An open-pore MFI zeolite nanosheet-modified separator with Li-ion flux regulation for lithium-metal batteries.

Separator modification has become one of the most facile and promising methods to inhibit Li dendrite formation. Herein, an open-pore MFI zeolite nanosheet-modified polyacrylonitrile (open-pore MFI NSs@PAN) separator was prepared the combination of vacuum filtration and the electrospinning technique. The straight channels in the MFI NSs, the fluid channels formed by the stacking of the MFI NSs and the interconnected network channels formed by the interweaving of the PAN nanofibers jointly constructed a micro/nano pore structure, which provides sufficient Li transport channels and enables uniform Li flux.

Polyacrylonitrile/UV329/titanium oxide composite nanofibrous membranes with enhanced UV protection and filtration performance.

Ultraviolet (UV) radiation is extremely dangerous to humans and can contribute to immunosuppression, erythema, early ageing and skin cancer. UV protection finishing may greatly influence the handling and permeability of fabrics, while UV-proof fibres can guarantee close contact between UV-resistant agents and fabric without affecting the handling of the fabric. In this study, polyacrylonitrile (PAN)/UV absorber 329 (UV329)/titanium dioxide (TiO) composite nanofibrous membranes with complex, highly efficient UV resistance were fabricated electrospinning.

Fluorine-Free Hydrophobic Modification and Waterproof Breathable Properties of Electrospun Polyacrylonitrile Nanofibrous Membranes.

Waterproof breathable functional membranes have broad application prospects in the field of outdoors textiles. The fluorine-containing microporous membranes of the mainstream functional products easily cause harm to the environment, and thus, the fluorine-free environmental nanofibrous membranes are an important development direction for functional membranes. In this subject, the electrospun polyacrylonitrile nanofibrous membranes were first hydrophobically modified by amino functional modified polysiloxane (AMP), followed by in situ cross-linking modified with 4, 4'-methyl diphenylene diisocyanate (MDI).

In situ deposition of nano CuO on electrospun chitosan nanofibrous scaffolds and their antimicrobial properties.

In order to obtain a synergistic antimicrobial effect of cuprous oxide nanoparticles (CuO NPs) and chitosan (CS) nanofibers, the nano CuO/CS nanofibrous scaffolds were synthesized in situ via two subsequent steps of chelation and reduction. The Cu were stably chelated on CS nanofibrous scaffolds through the coordination of amino group (-NH) and hydroxyl group (-OH) on CS with Cu, and then the chelated Cu were reduced to nano CuO by Vitamin C under alkaline conditions. And by the measurements of XRD, XPS and FTIR-ATR, the results showed that CuO NPs were successfully deposited on the CS nanofibrous scaffolds.

Completely amorphous cellulose biosynthesized in agitated culture at low temperature.

The morphology and structure of the biosynthesized cellulose are related to the culture methods and conditions. In order to investigate the detail culture conditions, the Gluconacetbacter xylinum 1.1812 (ATCC 23767) strains were cultivated in static culture at 12 and 30 °C, and agitated culture at 12 °C.

Functional modification of breathable polyacrylonitrile/polyurethane/TiO nanofibrous membranes with robust ultraviolet resistant and waterproof performance.

Exploiting high-added-value textiles equipped with multiple functionalities like ultraviolet (UV) resistance, waterproofness, and thermal-moisture comfort is facing tremendous demand by a more discerning consumer market. However, the major challenge is to realize the equilibrium among the multifunction. Herein, a new attempt of fabricating superhydrophobic electrospun polyacrylonitrile (PAN)/polyurethane (PU)/titanium dioxide (TiO) nanofibrous membranes has been tried, and the membranes exhibited multifunction of UV resistance, waterproofness and breathability by coating modification with 2-hydroxy-4-n-octoxybenzophenone (UV531) and fluorinated acrylic copolymer (FAC).

Environmentally Friendly and Breathable Fluorinated Polyurethane Fibrous Membranes Exhibiting Robust Waterproof Performance.

Waterproof and breathable membranes that provide a high level of protection and comfort are promising core materials for meeting the pressing demand for future upscale protective clothing. However, creating such materials that exhibit environmental protection, high performance, and ease of fabrication has proven to be a great challenge. Herein, we report a novel strategy for synthesizing fluorinated polyurethane (C6FPU) containing short perfluorohexyl (-CF) chains and introduced it as hydrophobic agent into a polyurethane (PU) solution for one-step electrospinning.

Robust Fluorine-Free Superhydrophobic Amino-Silicone Oil/SiO Modification of Electrospun Polyacrylonitrile Membranes for Waterproof-Breathable Application.

Superhydrophobic waterproof-breathable membranes have attracted considerable interest owing to their multifunctional applications in self-cleaning, anti-icing, anticorrosion, outdoor tents, and protective clothing. Despite the researches pertaning to the construction of superhydrophobic functional membranes by nanoparticle finishing have increased drastically, the disconnected particle component is easy to fall off from the membranes under deformation and wear conditions, which has restricted their wide use in practice. Here, robust superhydrophobic microporous membranes were prepared via a facile and environmentally friendly strategy by dip-coating amino-silicone oil (ASO) onto the electrospun polyacrylonitrile (PAN) membranes, followed by SiO nanoparticles (SiO NPs) blade coating.

Tailoring Water-Resistant and Breathable Performance of Polyacrylonitrile Nanofibrous Membranes Modified by Polydimethylsiloxane.

The demand of water-resistant and breathable materials applied to a separation medium and protective garments is steadily increasing. Typical approaches to obtain these functional materials are based on hydrophobic agents and porous substrates with small fiber diameter, tiny pore, and high porosity. However, a fluorinated hydrophobic finishing agent usually employed in providing effective waterproofness is limited with respect to their environmental persistence and toxic potential.

Superamphiphobic nanofibrous membranes for effective filtration of fine particles.

The worldwide demands are rising for an energy-efficient and cost-effective approach that can provide advanced nanofibrous membranes with high filtration performance and superior antifouling properties. Here we report a novel synthesized fluorinated polyurethane (FPU) modified nanofibrous membrane optimized to achieve oil and non-oil aerosol particle filtration. By employing the FPU incorporation, the polyacrylonitrile/polyurethane (PAN/PU) composite membranes were endowed with superhydrophobicity with a water contact angle of 154° and superoleophobicity with an oil contact angle of 151°.