Glass-fiber (GF) membranes are widely used as venting components in medical infusion sets because of their high air permeability and low cost. However, their loose fibrous structure and heterogeneous pore architecture often lead to particle shedding, unstable barrier performance, and vulnerability to biofouling. Herein, a hierarchical GF/PVA/PVDF composite membrane was developed through a synergistic interphase engineering strategy. Poly(vinyl alcohol) (PVA) was first introduced into the GF scaffold by capillary infiltration to provide internal anchoring of the fibrous network through hydrogen-bonding interactions, followed by the deposition of a hydrophobic poly(vinylidene fluoride) (PVDF) nanofibrous overlayer to consolidate the heterogeneous surface morphology and regulate surface wettability while preserving interconnected venting pathways. Through the cooperative effects of internal anchoring and external surface consolidation, the resulting GF/PVA/PVDF membrane reduced the release of particles ≥ 5 μm by 55.6
In this study, anionic SiO2 nanoparticles were synthesized using the Stöber method. Then, the SiO2 nanoparticles were modified by chitosan quaternary ammonium salt (CQAS) to obtain cationic CQAS-SiO2 nanoparticles, which were analyzed by FT-IR, TG, TEM and XPS characterization. A direct layer-by-layer (LbL) assembly strategy by leveraging the electrostatic alternating attraction between CQAS-SiO2 and SiO2 without the assistance of polyelectrolytes was proposed to establish multi-layer SiO2 coatings on the surface of cotton fabric. By this way, a double-layer of SiO2 could be deposited in each assembly cycle, significantly improving the assembly efficiency. The effects of the amount of CQAS, the concentration of CQAS-SiO2/SiO2, and the number of assemble cycles on the coating effect were systematically investigated. When the dosage of CQAS exceeded 2
As thermal stress has intensified due to global warming and increasingly frequent summer heat waves, understanding how textile material properties and structural design influence thermal comfort has become increasingly important. This study investigated the thermal effusivity of 38 single fabrics (30 commercially labeled cooling fabrics and 8 non-cooling fabrics) and 66 bilayer fabric combinations to examine the effects of fiber composition, fabric layering, and placement on thermal effusivity under dry conditions. Thermal effusivity was measured using a Modified Transient Plane Source method. The results showed that, among single cooling fabrics, Nylon/Spandex blends exhibited the highest thermal effusivity, whereas 100
The direct incorporation of natural bioactive compounds into the polyester melt-spinning process is severely limited by thermal degradation and poor compatibility. This paper reports a method for preparing biofunctional polyester fibers containing hesperidin polyurea microcapsules. The microcapsules were synthesized via interfacial polymerization, and the thermal stability of the shell was optimized by adjusting the amount of reactant monomers and the polymerization temperature. The optimized microcapsules exhibit high encapsulation efficiency and reduced mass loss at polyester spinning temperatures. Subsequently, these microcapsules were melt-blended to form masterbatches, which were then used in melt spinning with pure polyester. The resulting polyester fibers exhibited strong antibacterial activity, significant antiviral efficacy and ABTS radical scavenging activity. After 30 wash cycles, the fibers retained most of their original bioactivity. This study provides a viable approach for the development of biofunctional polyester textiles.
Conventional cotton fabrics finished with physically coated erythritol for cool-touch performance suffer from poor washing durability, rapid Q-max decay, deteriorated air-moisture permeability, and mechanical property loss. To address these practical limitations, this work reports a green covalent cross-linking strategy for durable cool-touch cotton finishing. The strategy relies on pomelo-peel-derived polyphenol molecular bridges and thiol-generated disulfide (S–S) networks. Four sample groups (S0: blank cotton; S1: single polyphenol modification; S2: physical polyphenol-erythritol blend; S3: polyphenol-thiol disulfide cross-linked composite fabric) were prepared via a 130 °C pad-dry-cure process. Macroscopic performances including Q-max cool-touch coefficient, air permeability, water–vapor transmission, oil stain removal, washing resistance, tensile strength, UV resistance, and thermal stability were evaluated following national and international standards. Microscopic cross-linking mechanisms were characterized using SEM, XPS, Raman spectroscopy, UV–Vis spectroscopy, and TG analysis. The disulfide covalent networks enable stable immobilization of erythritol on fiber surfaces. Sample S3 exhibits improved Q-max performance and retains 80.1
