A type of high solid content waterborne polyurethane (HSWPU) dispersions applied to foamed artificial leathers were designed and prepared by prepolymer method. The solid content of the waterborne polyurethane dispersions could reach 53 %, and the foaming ratio could reach an astonishing 2.50 by adjusting the parameters. The influence of synthesis parameters, including R value (molar ratio of -NCO/-OH), D value (hydrophilic group content), trimethylol propane (TMP) content (degree of crosslinking) and ethylenediamine (EDA) content (it was chain extender) on foaming ratio were investigated. Meanwhile, a series of properties of HSWPU dispersions, films and foamed artificial leathers were introduced in detail. The results demonstrated that R value, TMP content, D value and EDA content synergistically decided the foaming properties of HSWPU dispersions in three aspects: three-dimensional structure, surface tension and polarity, respectively. With optimized parameters of R = 2.0, TMP = 0.4 wt%, DMPA = 3.0 wt% and EDA = 60 wt%, the HSWPU dispersions had good appearance and stability, and the latex particles exhibited excellent water, acid and alkali resistance after films formation. The HSWPU dispersions with high foaming rate without collapsing in the foam-forming process and created uniformly bubble pores. In terms of application properties, the prepared foamed artificial leathers showed admirable air permeability and water vapor transmissions. All results distinctly demonstrate a feasible yet promising paradigm for applying the HSWPU on foamed artificial leathers had great potential applications.

The waterborne polyurethane(WPU)fixing agent is synthesized with polyethylene glycol(PEG-1450),toluene diisocyanate(TDI),1,4-butanediol(1,4-BDO),and N-methyldiethanolamine(MDEA)as raw materials.By changing the ratio of hydroxyl group in the soft and hard segments,and the ratio of 1,4-BDO to MEDA,and using acetic acid solution instead of deionized water to emulsify prepolymers,a stable color fixing agent is pre-pared.By testing of average particle size,zeta potential of WPU emulsions,wet rubbing fastness and soaping fastness of the treated fabric,WPU-10 is finally determined as the best formula.Stabilized working liquor is ob-tained with WPU-10,which have Class 4-5 rubbing fastness after finishing on cotton fibers.

Membrane separation technology has been increasingly applied owing to its high efficiency and low energy consumption during resource treatment. However, the development of eco-friendly membranes with high per-formance and long-term sustainability remains a challenge. To address this issue, we designed a three-dimensional (3D)-modified biopolymer-based membrane using renewable glucose and a zirconium-based met-al-organic framework (Zr-MOF) for molecules/ions separation. The Zr-MOF and basal membrane were poly-merized at the interface using natural glucose molecules and dopamine as bridging agents to form a 3D-integrated Zr-MOF-Glucose-Polydopamine (Zr-MOF-GP) composite membrane, serving as a "green" separa-tion layer. The developed separation layer emerged additional molecular transport channels, rapid adsorption, ultrafast penetration of the solution on the surface and inside the Zr-MOF-GP composite membrane, and high molecular retention while achieving ultrahigh permeability. Moreover, the Zr-MOF-GP composite membrane exhibited excellent structural and long-term application stability in complex systems owing to the new chemical bonds formed between glucose and Zr-MOF and polydopamine substrate (synergistic effect). The experimental results demonstrated that the designed membrane exhibits superior desalination properties (99.8% Na2SO4 retention while the water flux is 31.6 L/ m2 & BULL;h & BULL;bar), good removal of heavy metal ions (69.4% for 2000 ppm Pb2+), and considerable organic solvent resistance (98.8% Rose Bengal retention while the N,N-dimethylformamide permeance is 15.6 L/ m2 & BULL;h & BULL;bar), and excellent antifouling performance. This high -performance and environment-friendly biopolymer-based composite membrane will inspire the further the development of sustainable membrane-separation technologies.

As conventional water purification technologies are inefficient, they put us at risk of exposure to emerging micropollutants. Here, we report a two-step method for rapid construction of a stable enzyme@MOF biomimetic membrane comprising enzyme-embedded metal-organic framework-based biocomposites for continuous and efficient removal of micropollutants from water. We first prepared a horseradish peroxidase@zeolitic imidazo-late framework-8 (HRP@ZIF-8) biocomposite via ball-milling method, capable of preserving structural integrity and the entrapped enzyme bioactivity under different denaturing environments. The second step involves bio-composite membrane synthesis via stimulation of polydopamine (PDA) polymerization with UV light after successively dispersing the dopamine and HRP@ZIF-8 biocomposite molecules in a neutral pH Tris-HCl system. Accompanied by the clever codeposition with PDA, the HRP@ZIF-8 biocomposite can be "sandwiched" between the PDA layers to create a stable HRP@ZIF-8-composite membrane (HRP@ZIF-8-CM). HRP@ZIF-8-CM syner-gistically integrates MOF adsorption, enzyme catalysis, and membrane separation functions. The calculated encapsulation rate of the HRP@ZIF-8 biocomposite is & LE; 98.2 %. The enzyme@MOF composite membrane has a catalytic degradation efficiency of 98 % for bisphenol A (1 mg/L), membrane water flux of 32.3 L/m2 h bar, outstanding stability, and high efficiency after 7 cycles of use. Surprisingly, the bisphenol A removal rate of the enzyme@MOF composite membrane remained stable under varying denaturing conditions, including wide pH and temperature ranges and proteolytic enzymes, indicating that HRP enzyme activity is well preserved, prob-ably owing to the bio-inertness of ZIF-8. In conclusion, we propose a new, simple, and fast method for the constructing enzyme@MOF composite membranes, which can significantly improve water purification.

The diverse application potential of metal-organic framework (MOF) materials are currently limited by their challenging and complicated preparation processes. In this study, we successfully developed a novel strategy for the rapid synthesis of a sustainable MOF composite membrane under neutral conditions with improved physicochemical and antibacterial properties. Our reaction pipeline comprised visible light that induced the production of reactive oxygen species (ROS) from ZIF-8 particles, which facilitated the rapid oxidative polymerization of dopamine to polydopamine. The physicochemical properties of the composite membrane were assessed using imaging methods, including scanning and transmission electron microscopy, X-ray photoelectron spectrometry, and nitrogen adsorption/desorption; its antibacterial effects against Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa were measured using optical densitometry. The bactericidal potency of the synthesized membrane was >99% against all tested strains under the conditions of simulated sunlight. Moreover, the composite membrane retained its structural integrity and antibacterial effect after multiple cycles of use and recovery, showcasing remarkable stability. Overall, this study displays a ROS-mediated method for the rapid preparation of sustainable MOF composite membranes under neutral conditions with optimal physicochemical characteristics, antibacterial properties, and performance. Our study provides insights into the use of membrane materials as design platforms for a range of diverse practical applications.

为使沸石分子筛具有更大的孔隙率,使用一种新型有机硅季铵盐介孔模板剂,采用一步水热合成法制备了含介孔沸石.在150℃下水热反应72 h,100℃干燥4h,600℃下焙烧6h获得ZSM-5-H产品.采用X射线衍射(XRD)、扫描电镜(SEM)、氮吸附方法对其进行表征,结果表明,所得沸石分子筛具有良好的晶态结构和较大的介孔体积.其粗糙的表面和丰富的介孔证明了所合成的模板剂具有改变沸石形貌和内部构造的功能.

Hierarchically porous ZSM-5 zeolites were synthsized by a new organosilane template with tricarbamate carbon chains.The structure of the zeolite crystals was confirmed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption-desorption measurements, and X-ray diffraction (XRD), which showed an elliptical crystal morphology and contained mesopores around3.5 nm in it.

A new organosilane template with double-carbamate carbon chains were synthesized for preparation of mesoporous zeolites. The structure of the acquired zeolite crystals was confirmed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption-desorption measurements, and X-ray diffraction (XRD), which indicated that their structure has the same characteristics as ZSM-5 zeolites, and there were about 4 nm and 6 nm mesopores in the acquired zeolites.

A novel hierarchical ZSM-5 zeolite containing two disparate morphologies was prepared by using a new organosilane surfactant with two long alkyl chains. Main crystal phase arrayed regularly and stacked in dense layers. However, the rest of crystalline phase was shaped like egg tarts.

Mesoporous zeolites were synthesized by a new organosilane template with double-oxycarbonyl carbon chains. The structure of the zeolite crystals was confirmed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption-desorption measurements, and X-ray diffraction (XRD), which showed that their structure has the same characteristics as ZSM-5 zeolites, and there were about 4 um mesopores in the acquired zeolites.

A ZSM-5 zeolite molecular sieve was prepared by using a new type of double long-alkyl-chain organosilane template. The structure of the acquired zeolite was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nitrogen adsorption–desorption measurement, which showed a piled circular sponge crystal morphology and contained mesopores around 4 nm in it.

Pores of ca. 11 nm size were created in ZSM-5 zeolite crystals by a novel double-acyloxy amphiphilic organosilane surfactant as a mesopore-directing template. The zeolite crystals had a platelet-like morphology and sponge-like surface. The morphology of the obtained zeolites was compared with conventional zeolite synthesized by the same procedure except for the absence of the double-acyloxy organosilane surfactant.

A novel type of double-acyloxy amphiphilic organosilanes with different alkyl chain lengths were synthesized as mesoporous templating agents to prepare mesoporous ZSM-5 zeolites. The zeolites obtained had sponge-like surfaces and variable morphology; mesopores of 4, 13, and 33 nm were constructed in the crystals without damaging their crystallinity. The H2O/Si ratio, Si/Al-gel ratio, and organosilane template content all had an influence on zeolite crystallinity and surface properties as indicated by X-ray diffraction (XRD), nitrogen physisorption analysis, and scanning electron microscopy (SEM). In addition, variation of the alkyl chain length of the organosilanes resulted in different zeolite crystal size, morphology, and pore-size distribution.

TPOAC and TPABr were used to achieve the facile synthesis of two different types of hybrid core–shell ZSM-5 zeolites.

AbstractQuaternary ammonium surfactants 3a–d, with diether linkages in the backbone between hydrocarbon chains and the ammonium head groups, were synthesized as potential soft-template agents for the preparation of mesoporous materials. Varying the length of their carbon chains was expected to control the pore sizes of the corresponding mesoporous materials prepared. The critical micelle concentration (CMC) and γcmc (surface tension of the CMC) of these surfactants were measured by surface tension method.

An oligosaccharide donor, acetylated sept-D-glucopyranose tetradecyl carbamate, was designed and synthesized. This compound could be easily linked to hydroxyl-containing compounds through an Oglycosidic bond. Characterization of all the oligosaccharide intermediates and the final product was thoroughly discussed.

Mesoporous zeolites with a chain-like morphology were synthesized by adding a rationally designed carbamate-linked organosilane to conventional alkaline zeolite synthesis mixtures. The structure was confirmed by a complementary combination of X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and nitrogen adsorption desorption measurements. The XRD patterns and SEM images of the samples acquired at different crystallization time clearly showed the change of crystallinity and the forming process of the morphology.

A series of rationally designed carbamate-linked organosilanes with double alkyl chain lengths from C8 to C14 were synthesized as novel template agents to prepare hierarchically porous zeolites. The variable chain lengths had strong affects on zeolite morphology control process in the given synthesis condition as indicated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and nitrogen adsorption–desorption analyses. The addition of the organosilanes with C8, C10 and C14 lengths (5 mol % of the total silica source) into the synthesis compositions gave zeolites with isolated crystals. While the organosilane with C12 length caused dramatic change in the product morphology and gave mesoporous ZSM-5 crystals with a chain-like morphology. XRD patterns, nitrogen sorption isotherm and SEM images of the samples taken during crystallization clearly showed the change of crystallinity, texture properties and forming process of this morphology.

The comprehensive experiment has been one of the prescribed courses for the senior students in the department of applied chemistry of Donghua University since 2004.It has become one of the practice teaching courses which are helpful in cultivating the spirit of innovation of undergraduate students' after educational reform.The senior students can obtain primary knowledge of scientific research through the selection of the experimental method and parameters.

This paper reports the development of deodorant and antimicrobial finishes for wool. The better deodorization activity and antimicrobial activity were obtained when the wool fabrics were treated with 25g/L beta-cyclodextrin, 60g/L polyurethane, chitosan (0.5%, w/w), dried at 80 degrees C for 3 min and cured at 180 degrees C for 1 min. Wool fabric treated by beta-cyclodextrin combined with chitosan showed much better antimicrobial activity than wool treated by chitosan alone even after 20 wash cycles.