Heterogeneous zinc/catechol-derived resin microsphere-functionalized composite hydrogels with antibacterial and anti-inflammatory activities promote bacterial-infected wound healing.

Bacterial infection in the injured skin may threaten the wound repair and skin regeneration owing to aggravated inflammation. The multifunctional dressings with persistent antibacterial activity and improved anti-inflammatory capability are urgently required. Herein, a type of heterogeneous zinc/catechol-derived resin microspheres (Zn/CFRs) composed of zinc ions (Zn) and zinc oxide (ZnO) nanoparticles was developed to impart the methacrylamide chitosan (CSMA)-oxidized hyaluronic acid (OHA) hydrogel with a persistent Zn release behavior.

Reactions of Tris(o-,-dimethylaminobenzyl)cerium(III) with Oxidizing Agents, Dichalcogenides, and a Thiophosphinic Amide Ligand.

Reactions of a cerium(III) o-,-dimethylaminobenzyl (DMAB) complex with oxidizing agents, dichalcogenides, and a thiophosphinic amide have been studied. Treatment of the reported homoleptic DMAB complex [Ce(DMAB)] () with Ag(OTs) (OTs = tosylate) and Ag(OTf) (OTf = triflate) in tetrahydrofuran (thf) afforded [Ce(DMAB)(μ-OTs)(thf)] () and [Ce(DMAB)(OTf)(thf)] (), respectively. Reactions of with CuI and CuCl led to isolation of [Ce(DMAB)I] () and [Cu(DMAB)], respectively.

Preparation of strong and tough alginate fibers through multiple Ca crosslinking structures and interpenetrating networks.

Green and low carbon development has become an unstoppable mainstream of the global and forced a trend of developing biomass fibers with high performance. Alginate fiber is an important component of marine biobased fibers that has gained widespread interest recently. However, applications of alginate fiber are facing challenges because of its limited mechanical properties.

B/N/P synergistic system for multifunctional flame-retardant cotton fabrics with thermal stability and fine physical properties.

The flammability of cotton fabrics limits their application in certain fields, making it necessary to impart flame-retardant properties to them. In this experiment, a multi-element synergistic flame retardant, PNBAPP, was developed by introducing B/N/P elements. After modification, the limiting oxygen index (LOI) of the cotton fabric increased from 18 % to 42.

Facile preparation of flame-retardant phosphorylated chitin nanocrystals with reactive deep eutectic solvent based on urea-phosphate.

Nanochitin, a biomass resource, is well-known for its abundance, renewability, environmental friendliness, and nanoscale dimensions, which have garnered significant interest from researchers. However, it is a highly flammable polysaccharide, which limits its applications, especially in areas requiring high thermal stability and low combustibility. In this study, urea phosphate/urea was used as a reactive deep eutectic solvent (DES) to prepare phosphorylated chitin.

Natural polysaccharide mediated hybrid intumescent flame retardant enables epoxy resin with high fire safety and mechanical performance.

Effectively integrating synergistic flame retardancy and mechanical preservation for high-performance epoxy resins (EP) remains a great challenge. Herein, we demonstrate a natural polysaccharide-assisted assembly strategy to fabricate custard apple-like hybrid intumescent flame retardant (ZTA) that combines the synergistic advantages of ammonium polyphosphate (APP), tannic acid (TA), and zinc borate (ZB) endows EP with high flame retardancy, smoke/toxicity suppression, and mechanical preservation. Leveraging biomass TA as interface binder to provide multiple noncovalent and coordination anchor sites, ZB microparticles are rapidly assembled on the APP surface to form ZTA with protuberant microparticles.

Green Fabrication of Phosphorus-Containing Chitosan Derivatives via One-Step Protonation for Multifunctional Flame-Retardant, Anti-Dripping, and Antibacterial Coatings on Polyester Fabrics.

With the increasing urgency of petroleum resource scarcity and environmental challenges, the development of degradable bio-based flame retardants has become crucial for enhancing the fire safety of organic materials. In this work, a phosphorus-containing chitosan derivative (CS-PPOA) was synthesized via a one-step protonation reaction between chitosan (CS) and phenylphosphinic acid (PPOA) under mild conditions. The resulting multifunctional flame-retardant coating was applied to polyester (PET) fabrics.

Multifunctional Meta-Aramid Fabrics Enhanced with Inherent Flame-Retardant Polyurea Coatings: Integration of Mechanical Strength, Puncture Resistance, and Self-Healing Properties.

In this study, a solvent-free, slow-curing, inherently flame-retardant polyurea coating was successfully developed through an optimized formulation. The novel polyurea was synthesized using mixed Schiff base latent curing agents derived from terminal polyether amines with different-number average molecular weights (D2000 and D400), methyl isobutyl ketone, and polyethyl phosphate glycol ester (OP550). Subsequently, polyurea/meta-aramid (PUA/AF) composite fabrics were fabricated via a scraping coating technique.

γ-Valerolactone-Enabled Mild Methanolysis of Waste Polyethylene Terephthalate for Efficient Chemical Recycling.

To tackle growing resource and environmental challenges, closed-loop chemical recycling of waste PET is gaining significant attention. Methanolysis demonstrates significant industrial potential due to the ease of separation and purification of its depolymerization product, dimethyl terephthalate (DMT). However, conventional methanolysis processes for PET typically require harsh conditions (>200 °C and 2-4 MPa), highlighting the need for more efficient and milder methods.

Green facile fabrication of halogen-free flame-retardant ABS with high mechanical performance.

The development of halogen-free flame-retardant acrylonitrile-butadiene-styrene (ABS) with both high fire safety and excellent mechanical properties remains a significant challenge. Herein, cerium chemical hybrid ammonium polyphosphate (Ce@APP) was synthesized through an ion-exchange reaction in a water-ethanol solvent, and halogen-free intumescent flame-retardant ABS composites (denoted as ABS6) were fabricated by incorporating a phosphamide derivative (DP). Different from the APP/DP system, the excellent synergistic effects of Ce@APP/DP, including strong catalytic cross-linking carbonization, gaseous dilution and capture mechanism at high temperatures (especially above 570 °C), endowed the ABS composites with excellent fire safety.

Cellulose-rich photothermal wood aerogels via partially delignification-reactive black dyeing for interface evaporation of dye wastewater.

Conventional dye wastewater treatment methods, like adsorption and degradation, have limitations such as restricted applicability, secondary pollution, and residue issues. Developing efficient, eco-friendly, and universal decolorization materials is crucial for treating complex dye wastewater. In this study, black-dyed cellulose-rich wood aerogels were used to construct a 3D flower-shaped solar evaporator for purifying dye wastewater.

Ultra-efficient and fire-safety glucose-based cellulose fabrics with high antibacterial and well wearing performance.

Developing ultra-efficient fire-safety lyocell fabrics with high performances from biomass was the immense interest due to the sustainable and protective concerns. Herein, novel fully biomass coating of lyocell fabrics (Lyocell/PA-ZnG) was prepared using phytic acid (PA) and zinc gluconate (ZnG) via ion exchange reaction with water solvent. The ideal molecular regulation strategy endowed the Lyocell/PA-ZnG fabrics with rapid-formation thermal insulation residuals and excellent fire safety, which could pass the vertical burning test with the limiting oxygen index (LOI) of 28.

Manufacturing of post-consumer waste cotton pulp and its regenerated cellulose fiber.

Disposing waste textiles through landfills and incineration leads to significant resource wastage and environmental pollution. The recycling and utilization of textile waste have gained increasing attention. This study aims to transform cotton textile waste into cellulose pulp, which is further processed into a regenerated cellulose membrane via the viscose process (NaOH/CS).

Janus cotton with unidirectional-wicking, tri-mold cooling and antibacterial performance for personal thermal-moisture management.

Single-mode personal thermal-moisture management fabrics cannot ensure the comfort and safety of the human body in high-temperature, high-humidity, and complex environments. Here, a tri-cooling cotton fabric (TCCF) that combines evaporation, convection, and heat storage with a converging pore array, Janus wetting structure and phase change microcapsule is demonstrated. Benefiting from its Janus wetting structure and converging pore array, the TCCF exhibits excellent unidirectional sweat-wicking performance (717 unidirectional transfer index) and rapid water vapor transmission (223.

Comparison of bacterial cellulose production by various biomass wastes as culture media.

Bacterial cellulose (BC) has been widely used in various fields because of its excellent physical and chemical characteristics. However, the high production cost limits its applications. This study focused on the investigation of culture media prepared from three kinds of biomass wastes including vinegar residue (VR), paper mulberry (PM), and seagrass (SG), and their potential for BC production using kombucha was evaluated.

Efficient Recovery of Waste Cotton Fabrics Using Ionic Liquid Methods.

Cotton fiber, renewable natural cellulose, make up the largest portion of textile waste. The ionic liquid method has been successfully employed to regenerate waste colored cotton fabric in this study, offering a comprehensive approach to the recycling of waste cotton. The chemical recovery process for reclaimed cellulose materials is crucial for high-value recycling of waste cotton fabrics.

Spider web-inspired multifunctional compound for durable fire safety, smoke suppression and enhanced strength cotton fabrics.

Flame retardants with outstanding flame resistance and durability, addressing the issues of excessive smoke and weakened strength found in traditional phosphorus-based flame retardants for cotton, and offering benefits such as high char yield, low smoke emission, formaldehyde-free composition, and enhanced fabric strength, represent the future direction of eco-friendly flame retardants for cotton textiles. This study reports a durable/enhanced/smoke suppressing flame retardant system with multiple flame retardant elements. A phosphorus‑nitrogen‑boron flame retardant (TCPA) was successfully synthesized from melamine, phosphoric acid, and a boron spiro ring.

Conductive Structural Colored Cotton Fabrics with Nonangle-Dependent Colors and Dynamic Thermal Management.

Textile dyeing based on structural colors has attracted great attention due to its environmental friendliness and long-lasting color fastness. However, most studies on structural colored fabrics focus on only improving the color and stability of the fabric, neglecting the increasing demand for multifunctional textiles in daily life. Herein, a simple and effective method was used for preparing conductive structural colored cotton fabrics with nonangle-dependent colors and dynamic thermal management.

A higher durability flame retardant for regenerated cellulose fabrics based on fully bio-based phytic acid and L-arginine.

To truly endow flame-retardant fabrics with practicality and solve the problem of non-durability of flame-retardant Lyocell fabrics, this study prepared a fully bio-based flame retardant, PALA, using biomass phytic acid (PA) and L-arginine (LA). PALA was processed onto Lyocell fabrics through twice dip-pad-cure processes to prepare flame-retardant Lyocell fabrics with higher durability. The limiting oxygen index (LOI) value of PALA-Lyocell (D) was 48.

High-Performance Alginate-Poly(ethylene oxide)-Based Solid Polymer Electrolyte.

Solid polymer electrolytes (SPEs) have gained tremendous attention because they are expected to solve the safety problems caused by liquid electrolytes. However, the low ion-transport capacity, insufficient mechanical strength, and unsatisfying flame-retardant properties greatly limit their further application. Here, we designed a poly(ethylene oxide) (PEO)-based SPE by introducing a calcium alginate (CA) nanofiber membrane obtained by electrospinning as a framework.

A biomass-based "double-encapsulation structure" heightens the flame retardancy, antimicrobial effectiveness, and hydrophobicity of cotton fabric.

Due to the non-renewable nature of petroleum resources, there has been a notable shift toward utilizing biomass materials to confer flame retardant properties to cotton fabrics. However, endow solely with single function cannot meet the application requirements across various fields. Therefore, there is considerable impetus to develop multifunctional cotton fabrics integrating flame retardant, antimicrobial, and hydrophobic properties sourced from biomass.

Flame retardancy and durability of cotton fabric modified with high-efficiency diboraspiro rings groups flame retardant.

The synthesis of highly efficient and environmentally friendly flame retardants through the synergistic interaction of boron, phosphorus and nitrogen is becoming a new research direction. In this study, N-DBSPA, a flame retardant with high flame retardancy, high thermal stability and high efficiency, was prepared by the reaction between pentaerythritol borate and amino trimethylene phosphate, and the limiting oxygen index (LOI) of the modified cotton fabric increased from 18 % to 44.7 % at a weight gain (WG) of 20.