High-performance thermosetting elastomers suffer from a long-lasting conflict between mechanical robustness and dynamic recyclability. To overcome the issues, a novel concept that employing polyphenolic lignin and imine bond-containing chain extender to synergistically construct multi-dynamic crosslinked polyurethane (PU) vitrimer was proposed. The incorporation of polyphenolic lignin generated dynamic phenol-carbamate bonds in polymeric backbone offering H-bonding sites while inducing the ordered H-bond assembly in polymer hard domain, contributing to mechanical robustness and environmental tolerance. Reversible imine bonds mediated by chain extender promoted chain fluidity and reconfiguration to enable re-processability and recyclability at moderate temperature. The synergistic effect of these multi-dynamic bonds endowed the synthesized polyurethane (LPU-CN) vitrimer with remarkable tensile strength of 25.3 MPa, Young's modulus of 44.7 MPa and toughness of 138.8 MJ/m3 without trading off dynamic nature. LPU-CN exhibited a broad operational temperature range and scalable melt processability via molding, injection and extrusion techniques with a high melt flow index of 12.1 g/10 min. Notably, LPU-CN could withstand 10 processing recycles with 83.2% retained strength, the highest recyclability to our knowledge. Additionally, such vitrimer possessed exceptional resistance to common solvents and UV irradiation with structural stability. Therefore, this study provides a feasible strategy for developing high-performance polyurethane with thermoplastic-like re-processability and thermoset-like robustness.

Sunlight-driven photothermal materials have received increasing attention as promising candidates for addressing energy and freshwater crises; however, achieving a balance among high photothermal conversion efficiency, long-term stability, and environmental sustainability remains a significant challenge. Herein, a bio-derived sustainable photothermal material, polyhydroxyurethane (PHU) containing hydroxycarbamate structures, was designed and synthesized using lignin and CO₂ as renewable feedstocks. In this strategy, phenolic lignin is incorporated into polyurethane molecular backbone to construct hydroxycarbamate structure and dense hydrogen-bonded network, which strengthening π-π stacking interactions, endowing lignin-derived polyhydroxyurethane (LPHU) with broad-spectrum light absorption (200-2500 nm) and high photothermal conversion capability of 85.90%. Under simulated sunlight irradiation, the surface temperature of LPHU can reach 119.8 °C within 120 s. Furthermore, a thermoelectric generator combined with LPHU produced an open-circuit voltage of 1.6 V under natural sunlight, sufficient to drive cooling fan. Additionally, the phenolic hydroxyl groups and conjugate structures in lignin endow LPHU with enhanced UV-shielding and antioxidant properties. Exposed to UV radiation and thermal aging at 60 °C for 14 d, LPHU maintained its structural integrity, and 92% of photothermal conversion efficiency in comparison to the initial value. Furthermore, DFT calculations and quantum chemical simulations were conducted to provide molecular-level insights into the contribution of π-π conjugation interactions and intramolecular charge transfer processes to photothermal conversion enhancement.

The development of fire safety and sustainable polyurethane foam (PUF) has been given extensive attention in the construction and transportation fields, but still faces great challenges. Herein, a novel design strategy was proposed to achieve superior flame retardant and smoke suppression performances by a molecular incorporation of polyphenol lignin into the polymeric backbone and subsequently layer-by-layer coating of polydopamine (PDA) and phytic acid (PA). Such a unique molecular structure and dual protective layers synergistically improved the condensed-phase and gas-phase flame retardancies, enabling the resultant all biomass-derived polyurethane foam (PDA/PA/LPUF) with an exceptional limiting oxygen index (LOI) value of 32.0% and UL-94 V-0 level. Notably, the peak heat release rate (PHRR), total heat release (THR), peak smoke production rate (PSPR), and total smoke production (TSP) were reduced by 71.35%, 52.58%, 58.70%, and 70.73%, respectively, compared with single-component lignin-based PUF, highlighting the remarkable enhancement in fire safety. These outstanding flame retardant and smoke suppression performances arose from the synergistic interactions among lignin, PDA and PA, which constructed multi-scale gas-solid protective barriers. In addition, the integration of polyphenol lignin enhanced the polymeric frame, thereby endowing the foam with well-defined cell structure, improved mechanical strength and high temperature thermal stability with 123.72% increment in the char residue. Overall, this study demonstrates a practical and efficient strategy for designing advanced flameretardant foams using sustainable biomass resources.

High-performance elastomers with excellent mechanical strength, toughness, and weather resistance are attractive for service in complex environments, but face great challenge. Herein, this work proposed mechanically robust, highly stretchable, and long-term weather resistant polyurethane (PU) bio-elastomer with defined ordered hard domains based on lignin-mediated covalent and non-covalent assembly inspired by natural plants. Specifically, polyphenol lignin as structural and functional monomer was reacted with isocyanate to construct carbamate bonds (-NHCOO-) forming robust hard segments and strong H-bond interactions to facilitate the formation of soft-hard nanophase separation structures. Benefiting from the integration of polyphenol lignin as well as lignin-mediated multilevel structures, the synthesized lignin-derived polyurethane (LPU) displayed outstanding thermal and mechanical properties. The initial decomposition temperature of LPU increased by 75 °C compared with PU. The tensile strength, elongation at break, elastic modulus and toughness of LPU with lignin substitution of 70 % were high to 60.39 MPa, 532.52 %, 235.71 MPa and 183.24 MJ/m3, which were 2.82, 0.92, 5.43 and 2.73 times increment than PU, respectively. Importantly, such designed LPU being exposed to accelerated artificial weathering conditions including UV irradiation for 96 h, seawater corrosion for 60 d and heat aging at 100 °C for 7 d, demonstrated fascinating long-term weather resistance with excellent structural integrity and mechanical tolerance. The mechanism of weather resistance of LPU was investigated. Therefore, this work not only provides a novel strategy for developing superstrong, nonmigrating intrinsic weather-resistant PU elastomers for harsh environments, but also provides a promising application of lignin in green engineering materials.

Cellulose films (CF) stand out among petroleum-based plastics due to their resource abundance, renewability, biodegradability and nontoxicity, but are hindered by the water sensitivity and poor mechanical performances. Herein, inspired by the cellulose/lignin network structure in natural bamboo, tough, stretchable and waterproof lignocellulosic film (LCF) was developed by embedding lignin into CF via physical impregnation. Lignin serving as natural binder was filled into the gaps between lamellar fibers of the swollen cellulose film and adhered onto cellulose fiber surfaces via intermolecular hydrogen bonding. The synergistic effect of densified structure and strong interfacial adhesion promoted the mechanical properties and water stability of the resulting LCF. The tensile strength of LCF reached to 73.37 MPa and was improved by 79.8 % when compared with CF. Even immersing in water for 30 d, LCF still presented remarkable mechanical performances with mechanical strength of 60.88 MPa, strain of 10.04 %. Synergistically, the incorporation of lignin also enhanced the thermal stability, antioxidant, UV shielding properties of LCF. Although the biodegradability of LCF was reduced by comparing with CF, it was still regenerable for sustainable usage. Therefore, this work provides not only a convenient method to fabricate lignocellulosic film, but also a high-performance full-biomass film that promises to replace nonbiodegradable petrochemical plastic.

The development of lignin-based non-isocyanate polyurethane (LNIPU) to replace petrochemical polyurethane (PU) has attracted attention, but is limited by the low reactivity and heterogeneity of lignin. Herein, high reactive polyphenol lignin was employed to prepare LNIPU via cyclic carbonation of lignin and subsequently reacting with diamine. The integration of polyphenol lignin constructed hydroxylaminoformate structures in polymeric hard segments, promoting the formation of intermolecular hydrogen bond networks and dynamic hard domains. The resultant LNIPU possessed tunable hard-soft nanophase separation structures by altering cyclic carbonated lignin amounts. And LNIPU behaved fantastic thermostability with the initial degradation temperature (T5%) of 200 °C. The tensile strength, Young's modulus and fracture energy of LNIPU were 5.96 MPa, 33.5 MPa and 0.25 MJ/m3, increased by 7.6, 5.1 and 2.8 times compared with NIPU, respectively. Due to the dual dynamic covalent and noncovalent networks, LNIPUs had relatively low activation energy (77.32-107.25 J/mol) and high molecular motility, enabling 100 % self-healing nature. Moreover, abundant aromatic conjugated structures in LNIPUs with polyphenol lignin enabled outstanding photothermal conversion ability. Under NIR irradiation with a power density of 1.0 W/cm2, the surface temperature of LNIPU 30 % quickly increased to 200 °C after 120 s, and displayed excellent stability undergoing 5 heating-cooling cycles. Therefore, this work not only provides a green and facile strategy for developing lignin-derived non-isocyanate polyurethan, but also provides a promising green engineering material with high strength, toughness and photothermal conversion property.

The high-value utilization of lignin for preparing high performance and multifunctional waterborne polyurethane (WPU) is a fascinating subject but still a challenge due to its low reactivity. Herein, highly reactive lignin with low molecular weight of 1398 Da and high hydroxyl groups of 12 mmol/g was employed as biopolyol to directly polymerize with isocyanate to prepare lignin-based WPU (LWPU). The integration of lignin to polymer backbone was conducive to the construction of strong H-bond interactions and more rigid hard-segment-rich domains, achieving uniform and stable LWPU emulsions. When the lignin substitution amount was 40 %, the mechanical strength, Young's modulus and toughness of the formed LWPU-40 films were improved to 12.51 and 272.25 MPa, 28.54 KJ/m3, increased by 13, 84 and 17 times than those of WPU, respectively, meanwhile the elongation at break was 370.44 %. Moreover, LWPU as coatings possessed fast film-forming ability, high adhesion strength, waterproofness and UV protection. Compared with commercial WPU (C-WPU), the surface and through drying time of LWPU-40 coating were shortened by 2 and 1.6 times, respectively. Moreover, the adhesive strength of LWPU-40 increased to 44.79 MPa, and could maintain initial 87.3 % after 48 h of water immersion. Therefore, this work proposes a novel insight of high-value utilization of lignin, simultaneously presents a feasible approach to develop high performance and multifunctional WPU coatings.

The development of bio-based polyurethanes (PU) elastomers with well-designed multiscale microstructures to customize their mechanical performances was desired, but remained an ongoing challenge. Herein, a novel strategy of integrating tailorable hard-soft nanophases with multiple hydrogen bond (H-bond) interactions was proposed to construct mechanically customizable PU bio-elastomers. In this strategy, highly reactive lignin with high hydroxyl contents was employed as bio-polyol monomer reacting with hexamethylene diisocyanate (HDI) to construct carbamate bonds with a function of tailoring H-bond degree via altering the feeding ratio of lignin. The rigid lignin cooperating with HDI as hard segments self-assembled to generate phase separated nanostructures. Consequently, the integration of well-defined hard-soft nanophases and multiple H-bond interactions in the synthesized lignin-based PU (LPU) achieved excellent and customizable mechanical performances ranging from highly elastic rubber to highly stiff plastic with ultrahigh strength of 72.8 MPa and unprecedented modulus of 3.5 GPa. Impressively, rubber-like LPU elastomers could recover 90 % of initial stress even after 500 stretching cycles, indicating fascinating resilience and fatigue resistance. More especially, rigid LPU plastics with fully hard domains and dense H-bond networks could be transformed into flexible and bendable paper-like elastomers once eliminating intermolecular H-bond interactions under 60( degrees)C hot water. Thus, this work provides a feasible and promising approach to construct supramolecular PU elastomers with excellent and customizable mechanical performances to extend their on-demand applications.

The development of sustainable bio-polyurethanes (bio-PU) from nonfood lignin has been attracting extensive attention owing to the abundant reserves, stable aromatic structures, and rich hydroxyls of lignin. However, exploiting a high-performance lignin-based PU integrating excellent mechanical properties with reprocessability is still a challenge. Herein, we proposed a dynamic phenolic-carbamates to construct robust and reprocessable bio-PU elastomers based on the reaction of phenolic lignin (PL) with isocyanate. Benefiting from the low Mw of 1692 Da and the abundant phenolic hydroxyls of 8.3 mmol/g, the adaptable cross-linking network consisting of dynamic hydrogen bonds and phenolic-carbamates were formed by PL. The synthesized phenolic lignin-based PU (PLPU) displayed tunable mechanical properties via adjusting PL substitution amount. The tensile strength, modulus and toughness of PLPU reached 58.8 MPa, 1350.3 MPa, and 57 MJ/m3 when the substitution amount of PL was 70%, respectively. Importantly, the reversible cross-linking structure endowed PLPU with excellent multi-reprocessability. After 5 reprocessing cycles, the retention ratio of strength, breaking elongation, modulus and toughness was 87.6%, 58.9%, 218.1% and 63.3%, respectively, which were 1.6, 1.1, 3.5, 2.2 times higher than those of commercial lignin-based polyurethane (CLPU). Therefore, this work not only presents a robust and multi-reprocessable lignin-based PU elastomer with high substitution amount, but also provides a promising sustainable alternative to replace petroleum-based plastic.

Lignin extraction and upgrade are the great importance to lignin valorization but are closely related to raw material sources, separation methods, and conditions. The advantage of this work is to firstly exploit an efficient and practical approach to extract highly reactive lignin from waste mulberry branches (MB) using green deep eutectic solvent (DES). To better understand the relationship between the extraction conditions and the properties of lignin, the influences of DES components, extraction temperature and time on the extraction efficiency, average molecular weight, chemical structure, and thermal stability of lignin were systematically investigated and analyzed. The synergistic effects of processing conditions resulted in high extraction efficiency with 62.9

The development of high-performance biodegradable polylactic acid (PLA) materials integrating high strength, malleability and toughness is desired but an ongoing challenge. In this work, a novel full-biobased block copolymer was designed and synthesized by grafting L (+)-lactide +)-lactide (L-LA) and epsilon-caprolactone (epsilon-CL) onto lignin via ring-opening polymerization. The obtained lignin-PLA-PCL block copolymer was composed of rigid lignin and poly (LA-CL) rubber segment, could self-assemble into uniform nano-micelles with average diameters of 80-100 nm regulated by simply altering copolymer content. The incorporation of lignin-PLA-PCL copolymers into PLA matrix induced the formation of many cavities, promoted free volume between PLA matrix and copolymer to accelerate chain mobility, achieving excellent ductility and stretchability with maximum stretching deformation of 64.8 %. The resultant PLA composites with the copolymer content as low as 5 wt% displayed simultaneously improved strength (41.84 MPa) and toughness (8.1 MJ/m3), 3 ), 6.7 % and 1520% increment than those of neat PLA, respectively. The reinforcing and toughening mechanisms were explored and verified that the combination of cavity growth and fibrillation, followed by extensive shear yielding of matrix, causing substantial plastic deformation. This study extended the design strategy and the foundation for simultaneous reinforcing and toughening PLA plastics using lignin-derived rubbery micelles.

The development of sustainable, biodegradable, non-toxic biomass foams with outstanding physical properties to replace traditional petroleum-based foams is urgent. In this work, we proposed a simple, efficient, and scalable approach to fabricate nanocellulose (NC) interface enhanced all-cellulose foam through ethanol liquid phase exchange and subsequent ambient drying. In this process, NCs served as reinforcer and binder were integrated with pulp fiber to improve cellulose interfibrillar bonding and interface adhesion between NCs and pulp microfibrils. The resultant all-cellulose foam displayed stable microcellular structure (porosity of 91.7-94.5 %), low apparent density (0.08-0.12 g/cm3), and high compression modulus (0.49-2.96 MPa) by regulating the content and size of NCs. Further, the strengthening mechanism of the structure and property of all-cellulose foam were investigated in detail. This proposed process enabled ambient drying, and is simple and feasible for low-cost, practicable, and scalable production of biodegradable, green bio-based foam without special apparatuses and other chemicals.

Biomass-derived sustainable film is a promising alternative to synthetic plastic, but hampered by strength, toughness and flexibility trade-off predicament. Here, a feasible and scalable strategy was proposed to fabricate strong and flexible lignocellulosic film through molecular reconstruction of cellulose and lignin. In this strategy, polyphenol lignin was absorbed and wrapped on the surface of cellulose fiber, forming strong interfacial adhesion and cohesion via intramolecular and intermolecular hydrogen bonding. Further, covalent ether bond was generated between the hydroxyl groups of lignocellulose to form chemical cross-linking network induced by epichlorohydrin (ECH). The synergistic effect of hydrogen bonding and stable chemical cross-linking enabled the resultant lignocellulosic film (ELCF) with outstanding mechanical strength of 132.48 MPa, the elongation at break of 9.77 %, and toughness of 9.77 MJ·m-3. Notably, the integration of polyphenol lignin synergistically improved the thermal stability, water resistance, UV-blocking performances of ELCF. Importantly, after immersion for 30 d, ELCF still possessed high wet strength of 70.38 MPa, and elongation at break of 7.70 %, suggesting excellent and durable mechanical performances. Moreover, ELCF could be biodegraded in the natural soil. Therefore, this study provides a new and versatile approach to reconstruct highly-performance lignocellulosic films coupling strength, toughness with flexibility for promising plastic replacement.

Due to the complexity, heterogeneity and recalcitrant structure of lignin, the extraction of multifunctional lignin directly from lignocellulose is still a challenge. Here, a green and recyclable route was proposed to separate highquality lignin and tailor its functionalities. Through tuning the components of deep eutectic solvent (DES) and separation procedures, DES extracted lignin (DESL) exhibited high purity of 99.6 %, yield of 83.2 % and phenolic hydroxyl content of 8.33 wt%. The results of FTIR and 13C NMR demonstrated that DESL possessed more oxygencontaining reactive groups compared with commercial lignin (CL), enabling DESL with more superior functional activities. DESL exhibited higher antioxidant activity with the DPPH capture rate of 73.2 %. Meanwhile, DESL showed strong bactericidal effects against E. coli (100 %) and S. aureus (100 %) due to higher phenolic hydroxyl content, which could destroy bacterial cell membranes and inhibit bacterial metabolism by interacting with phospholipid layer and protein. Additionally, DESL displayed strong UV absorption and could be blended with polyurethane to enhance UV shielding property of polyurethane composite film with >50 of UPF value. In summary, DES treatment is a suitable strategy for high-quality lignin separation, which opens a broad spectrum of possibilities for lignin valorization.

随着人们对生活品质要求的提高,混纺粗毛纱作为高端毛纺织品在市场上的需求量逐年攀升.然而,混纺粗毛纱的生产工艺和机械性能影响仍然是制约其产业发展的关键因素之一.本研究通过对混纺粘胶、涤纶、锦纶和羊毛的粗毛纱制作过程中加捻程度的调整,探究了加捻对纱线断裂强度和断裂伸长率的影响.结果表明,在一定的加捻程度范围内,纱线的断裂强度与断裂伸长均随着加捻程度的增加而呈现先上升后下降的趋势.加捻过程中,粗毛纱中的纤维同时收到拉伸和摩擦作用,适当的加捻能提升粗毛纱的机械强度,同时受混纺纤维的种类与性能影响显著.本研究结果可为混纺粗毛纱生产工艺的优化提供理论依据和实践指导.

Superelastic silk fibroin (SF)-based aerogels can be used as multifunctional substrates, exhibiting a promising prospect in air filtration, thermal insulation, and biomedical materials. However, fabrication of the superelastic pure SF aerogels without adding synthetic polymers remains challenging. Here, the SF micro-nano fibrils (SMNFs) that preserved mesostructures are extracted from SF fibers as building blocks of aerogels by a controllable deep eutectic solvent liquid exfoliation technique. SMNFs can assemble into multiscale fibril net-works during the freeze-inducing process, resulting in all-natural SMNF aerogels (SMNFAs) with hierarchical cellular architectures after lyophilization. Benefiting from these structural features, the SMNFAs demonstrate desirable properties including ultra-low density (as low as 4.71 mg/cm3) and superelasticity (over 85 % stress retention after 100 compression cycles at 60 % strain). Furthermore, the potential applications of superelastic SMNFAs in air purification and thermal insulation are investigated to exhibit their functionality, mechanical elasticity, and structural stability. This work provides a reliable approach for the fabrication of highly elastic SF aerogels and endows application prospects in air purification and thermal insulation opportunities.

In order to realize the high-value utilization of waste lignocellulose, bamboo powder was used as raw material, and the deep eutectic solvent (DES) composed of choline chloride (ChCl)/lactic acid (LA) was used to separate the components of bamboo powder. The lignin and cellulose were reconstructed by a simple hot-pressing method to prepare lignocellulosic board. In this paper, the effects of the components of DES, the amount of ferric chloride, reaction temperature and reaction time on the separation of lignocellulosic components were investigated. The structure and properties of DES-separated lignin (DESL) and cellulose (DESC), DES/FeCl3-separated lignin (DESL-FeCl3) and cellulose (DESC-FeCl3), and lignin fiberboards were analyzed by infrared spectroscopy (FT-IR), X-ray diffractometer (XRD), scanning electron microscope (SEM), Zeta potential tester, and universal testing machine. The results showed that the optimum process conditions were choline chloride and lactic acid with a molar ratio of 1:2, FeCl3 addition amount of 2%, reaction temperature of 140 ℃, and reaction time of 6 h. The yields of lignin and cellulose under these conditions were 85.57% and 48.4%, respectively. The phenolic hydroxyl number and Zeta potential of the extracted lignin were 12.86 mmol/L and -32.26 mV, respectively, and the particle size was small. The extracted cellulose had more active sites, which were favorable for the molecular reconstruction and interfacial bonding with lignin. After five cycles of recycling, DES still had good separation performance for lignocellulose. The water stability and mechanical properties of the prepared lignocellulosic board had been improved, water contact angle reached to 58.6°, and its tensile strength increased from 8.4 MPa to 53.1 MPa, which had the potential to replace petroleum-based plastics.

In this paper, the compound hot-melt adhesives were prepared by blending alkyl sulfonate polymer antistatic agent with modified rosin hot-melt adhesive and used for the preparation of polyethylene film/polypropylene-coated non-woven fabrics. The effects of the amount of antistatic agent on the melt viscosity, softening point, and thermal stability of the compounded hot-melt adhesives were studied. Then, the antistatic properties and its washing fastness of the coated non-woven fabrics were tested and analyzed. The results showed that the softening point and the melt viscosity of the hot-melt adhesives decreased after compounding, and the thermal stability of the compound hot-melt adhesives decreased in the high temperature range, which was not affected before 200℃. The surface inductive voltage, half-life, and specific resistance of the coated non-woven fabrics prepared from the compound adhesives decreased gradually with the increase of the amount of the antistatic agent, indicating that the antistatic property of the prepared fabrics was gradually improved. In addition, the fabrics still exhibited antistatic properties after soaping for several times. The influence of compound adhesive on the wettability of fabric surface was consistent with that of antistatic property. Finally, the mechanism of the hot-melt adhesive and antistatic agent compounding technology to improve the antistatic performance of the coated non-woven fabrics was elaborated, and the reason for its excellent soaping durability was also explained.

Activated carbon fiber (ACF) has broad application prospects in dyeing wastewater purification owing to its high specific surface area and hierarchical pore distribution. Natural fiber based ACFs is a group of emerging biomass adsorbent with attractive potential adsorbent properties. Herein, we develop a facile carbonization strategy to obtain a novel biomass ACF derived from the seed hair fibers of metaplexis japonica (MACFs), and the prepared MACFs possess hollow structure and the formation of graphite-like crystallites from MACFs is promoted by high temperature of carbonization. MACFs possess well-developed pore distribution, with a maximum specific surface area and total pore volume of 1882.003 m(2)/g and 1.613 cm(3)/g, respectively. MACFs exhibits the maximum adsorption capacity to be 943.372 mg/g for methylene blue (MB) fitting well with Langmuir model. Furthermore, MACFs can adsorb full solution of 90 mg/l by filtering only one time, proving its fast-adsorption performance. The high adsorption capacity and speed of MACFs are mainly attributed to three factors: high specific surface area and rich pores benefited from the full activation of hollow fibers, strong electrostatic attraction to MB provided by surface groups, and good contact with dye liquor. This work may shed light of the adsorption mechanism of biomass ACFs for the dyeing molecules and pave the way for the development of low-cost and highly efficient adsorbent.

Metaplexis japonica seed hair fibers (Mj-fiber), harvested from the seed pods of Metaplexis japonica (Apocynaceae: Asclepiadoideae) originating in China, Japan and Korea, have features ensuring its potential application in the textile and other industrial fields. In spite of the extensive study on the medicinal properties of Metaplexis japonica, research literature about Mj-fiber is quite limited. We obtained Mj-fibers by artificial peeling and seed removing; then the fiber morphology, chemical composition, structures, fiber surface absorption characteristics, and tensile and thermal properties were studied in detail. From the results, Mj-fiber has a hollow structure with a thin fiber wall and large lumen, in which the hollowness is over 92%. Uniquely, Mj-fiber is a natural profiled fiber with a cross-section of a "cross flower" morphology. At the same time, the density of it is very low, accounting for only one-fifth of the cotton fibers, and the fiber length distribution is relatively concentrated. The main component is cellulose, with a content of 53.9 ± 3.20% and structure of cellulose I. In particular, Mj-fiber has excellent hydrophobic and oil affinity surface characteristics. Moreover, the fibers bulkiness and warmth retention performance are comparable to that of duck down. Therefore, the results provide an experimental basis for the application of Mj-fibers in the textile and other industrial fields.