Materials Today Chemistry
·
2025
·
IF 6.7
Shan Zhang,Meng-chen Xu,Yu-peng Lu,Yi-tong Jiang,Shuo-chao You,Ya-hao Geng,Xiao-yan Li,Gui-yong Xiao
Biomedical dressings are highly susceptible to bacterial infections, and most suffer from poor mechanical resistance, leading to structural damage during application and reduced effectiveness. Therefore, developing novel dressings with high mechanical strength and effective antibacterial ability is essential. In this study, a multi-component composite membrane is designed to address these challenges by leveraging the reinforcing effect of hydroxyapatite nanofibers (HANFs) and the photothermal antibacterial abilities of copper sulfide (CuS). This composite membrane exhibits excellent mechanical properties, with a maximum ultimate tensile strength and Young's modulus of 61 ± 1.25 MPa and 937.36 ± 16.15 MPa, respectively, in the dry state. Under near infrared (NIR) irradiation, the generated heat and released Cu 2+ produce a synergistic antibacterial effect, with the inhibition rate against Staphylococcus aureus ( S. aureus ) exceeding 90 % when the HANFs@CuS content reaches 40 wt%. Cellular experiments confirm the good biocompatibility of the composite membranes across different HANFs@CuS contents, with cell viability maintaining over 80 % at 40 wt%. This study seamlessly integrates the mechanical advantage of HANFs with the photothermal antibacterial ability of CuS nanoparticles , providing a promising strategy for designing advanced biomedical dressings.
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Meirong Xu,Siqun Liu,Jiaxin Wen,Bingyang Wang,Huifang Wang,Xiaojie Lian,Xianghua Gao,Baolong Niu,Wenfeng Li
Silver-metal organic framework (Ag@MOF) has exhibited outstanding antimicrobial activity in antimicrobial applications, and reducing the biotoxicity associated with silver has become a research priority. In this study, Ag@MOF was initially modified with sodium alginate (SA) to form SA-Ag@MOF. The results showed that SA could control the release of Ag + , reducing the release by about 8% at 24 h, and the biotoxicity was significantly reduced. Finally, SA-Ag@MOF was applied as an antimicrobial agent in citric acid-modified PVA film to develop a novel composite antimicrobial film. When added at 2 MIC , the CA3-M2 film can effectively inhibit the growth of E. coli and S. aureus , and the inhibition rate has reached 98%. For white radish packaging applications, CA3-M2 film inhibited the growth of surface microorganisms, while ensuring moisture and tissue hardness to extend shelf-life up to 7 days. Overall, the strategy conceived here can be a theoretical basis for novel antimicrobial packaging .
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Zhongwen Su,Yonggang Peng,Ying Yu,Yujing Zhong,Junyue Zeng,Yikai Chen,Sekar Vijayakumar,Yangfan Mao,Lin Wang,Meihua Xin,Mingchun Li
Chitosan, a renewable resource, is increasingly studied for its food packaging applications. In this study, chitosan (CS) was used as a raw material to synthesize two derivatives—dodecyl chitosan quaternary ammonium salt (DMDBC) and triphenyl chitosan quaternary phosphonium salt (TPPBC). These were combined with polyvinyl alcohol (PVA) to develop a multifunctional food packaging material with enhanced physical, antibacterial, and antioxidant properties. The resulting composite films exhibited excellent homogeneity and biocompatibility. Strong intermolecular hydrogen bonding among DMDBC, TPPBC, and PVA was confirmed, contributing to the amorphous structural characteristics of the films. Among the various formulations, the film containing 6 % tartaric acid (6 % TA-C12) demonstrated the best mechanical strength, water vapor barrier, and oxygen barrier properties. Incorporation of DMDBC and TPPBC endowed the films with remarkable bioactivities, achieving DPPH and superoxide radical scavenging rates of 81.2 % and 35.6 %, respectively, along with inhibition zone diameters of 32.3 mm ( S. aureus ) and 29.5 mm ( E. coli ). Compared to commercial polyethylene (PE) films, the developed films effectively delayed spoilage and extended the shelf life of strawberries by up to nine days. These high-performance composite films hold strong potential as sustainable alternatives to conventional PE packaging materials in the field of fruit preservation.
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Food Packaging and Shelf Life
·
2025
·
IF 10.6
Dan Chen,Shiyu Lin,Liming Cao,Wei Huang
Antibacterial food packaging plays a crucial role in preserving food quality and extending shelf life. Polyvinyl alcohol (PVA) is widely used in food packaging, but its lack of inherent antimicrobial properties restricts its wide applications. Zinc oxide (ZnO) is an effective antibacterial agent. However, the uniform dispersion of ZnO nanoparticles (NPs) remains a challenge. To address this, hybrid NPs were constructed using cellulose nanocrystals (CNC) and cellulose nanofibrils (CNF) as bio-templates with ZnO in-situ loading onto their surfaces. These hybrid NPs were then incorporated into PVA/chitosan (4:1, w/w) compound to prepare transparent and antibacterial packaging films. The results indicate that ZnO loaded on the surfaces of CNC or CNF exhibited distinct morphological features. Antibacterial tests revealed that the combination of CS and ZnO exhibited organic-inorganic synergistic antibacterial activity. Furthermore, the hybrid NPs enhanced the mechanical strength and hydrophobicity, with CNF-ZnO showing superior reinforcement. Preservation tests on strawberry demonstrated that the films outperformed PE and PVA/CS films, indicating their effectiveness in maintaining fruit quality and prolonging shelf life.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Pengzhen Jin,Chunyan Hu,Jian Zheng,Zhijia Zhu,Baojiang Liu
Addressing global energy and freshwater scarcity requires sustainable, integrated technologies. Inspired by sunflower's water transport mechanisms, we developed a hydrophilic composite aerogel based on polyvinyl alcohol (PVA), chitosan (CS), and waterborne polyurethane (WPU). Incorporating carboxylated multi-walled carbon nanotubes (c-MWCNTs) yielded the BMPCW aerogel, a bifunctional system for simultaneous solar desalination and hydrovoltaic power generation. This design synergizes the aerogel's interfacial evaporation properties with c-MWCNTs' conductivity and photothermal conversion, significantly enhancing water/ion transport and energy conversion efficiency. Under 1 kW m −2 simulated sunlight, the system achieved a high freshwater evaporation rate of 3.41 kg m −2 h −1 and generated an open-circuit voltage of 125.2 mV in 3.5 wt% sodium chloride (NaCl) solution. The BMPCW aerogel exhibits excellent chemical stability, renewability, and maintains robust performance over multiple cycles. Aerogel array devices successfully demonstrated applicability in seawater desalination and powering small electronics. This work highlights the aerogel's potential for distributed energy, smart agriculture, and offshore applications, offering a novel biomaterial strategy and feasible pathway for sustainable clean water and green energy co-production.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Anni Fu,Ziyang Qiu,Qiuxun Liu,Ye Chen,Yuxuan Hu,Ximei Liu
Solar-driven interfacial evaporation holds great promise for clean water production, particularly in seawater desalination and wastewater purification. However, the limited evaporation performance of evaporators and their incapability to degrade organic contaminants hinder their practical applications. Here, we develop a bifunctional frustum-array solar-driven evaporator with high efficiency in both seawater desalination and photocatalytic dye degradation. Our evaporator, designated as FATPE, is fabricated via a template-assisting method with Ti 3 O 5 /PVA/PAM hydrogels to create a frustum-array structure. Under 1 sun irradiance (1 kW m -2 ), FATPE achieves an exceptional evaporation rate of 4.34 kg m -2 h -1 , energy efficiency of 95.90%FATPE, as well as excellent desalination capability with a salt rejection rate exceeding 99.90% in simulated seawater with varying salinities. Furthermore, FATPE can realize efficient photocatalytic degradation of varying organic pollutants, exemplified with a methylene blue (MB) degradation rate of 85.37%. This work realizes the dual functional synergy of high-efficiency water purification and photocatalytic dye degradation, offering a promising strategy for producing clean water from seawater and dye-contaminated wastewater in coastal regions.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yifei Gong,Haiyang Shen,Hua Zhao,Yueyue Zhang,Ping Li,Congliang Cheng
Quaternized polyepichlorohydrin (PyPECH) was successfully synthesized by the quaternization reaction between Pyridine and PECH. The correctness of the experimental result was demonstrated through Fourier transform infrared spectroscopy (FTIR) and 1 H NMR spectroscopy. With the combination of PyPECH, Polyvinyl alcohol (PVA), Ethylene-vinyl alcohol copolymer (EVOH), and Tetraethyl orthosilicate (TEOS), five different anion exchange membranes (AEMs) for diffusion dialysis (DD) were successfully prepared. The structure of prepared membranes was characterized and analyzed in detail, which included FTIR, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscope (TEM). At the same time, the comprehensive performances which included wate uptake (W R ), linear expansion rate (LER), ion exchange capacities (IEC), thermal stability, chemical stability, and mechanical stability were also discussed at great length. In DD experiments, the prepared membranes demonstrated excellent acid recovery ability, with the acid dialysis coefficients (U H + ) of 11×10 −3 to 35.5×10 −3 m/h. Furthermore, according to the test results, the prepared membranes exhibited a higher S value (35−50) than that of commercial membranes DF-120 (18.5). Therefore, the prepared membranes had competitive advantage in acid recovery via diffusion dialysis.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Runying Gao,Qingyun Zhao,Birong Zeng,Xinyu Liu,Yiting Xu,Conghui Yuan,Lizong Dai
Water-soluble poly(vinyl alcohol) (PVA) faces challenges in fabricating cross-linking networks with high strength and good reversibility. Herein, a strategy of nanocross-linker was proposed utilizing phenylboronic acid-functionalized carbon dots (B-CDs) to construct high-performance PVA vitrimers. The engineered B-CDs, with precisely controlled nanoscale dimensions (2.4–5.6 nm) and abundant surface functional groups, enabled synergistic chemical cross-linking and physical interactions. The stress relaxation behavior, mechanical properties, water/ultraviolet (UV) resistance, and fluorescent properties, as well as the detection application, were systemically investigated. The results showed that the prepared PVA/B-CDs vitrimer film with a thickness of 90 ± 10 μm exhibited remarkable mechanical strength in water. Compared with pure PVA film, the tensile strength and Young′s modulus of PVA/B-CDs0.5 increased from 63.89 MPa and 1.56 GPa to 130.40 MPa and 2.80 GPa, respectively. After being soaked in water for 5 days, the PVA/B-CDs0.5 films still retained a mechanical strength of one-fourth of the original value. Moreover, the dynamic borate ester bonds in PVA/B-CDs0.5 could endow the PVA/B-CDs composite film with reprocessing ability under hot-pressing. Additionally, the unique fluorescence of B-CDs caused outstanding UV resistance of the PVA/B-CDs film. Furthermore, the PVA/B-CDs film was found to achieve the detection and quantification of three common food dyes as fluorescent probes: tartrazine, sunset yellow, and amaranth.
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JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 6
·1-11
·
IF 2.8
Han Yu,Wei Chaoquan,Wang Ting,Zeng En
The inevitable damage to paint films during coating applications significantly reduces their protective performance, leaving the underlying substrate vulnerable. Developing self-healing coatings is therefore of critical importance. This study presents the synthesis of polyvinyl alcohol (PVA)/polyurea hybrid microcapsules (MCs) loaded with isophorone diisocyanate via interfacial polymerization in an oil-in-water emulsion, with PVA serving as the emulsifier. These microcapsules were incorporated into acrylic resin, along with a dispersant, co-solvent, and isocyanate curing agent, to formulate a microencapsulated self-healing two-component waterborne polyurethane (2 K WPU) coating. The microcapsules were characterized using TG, FTIR, and SEM. The influence of PVA's polymerization degree and alcoholysis degree on microcapsule properties was systematically analyzed. Results indicate that PVA 1799 as an emulsifier yields microcapsules with minimal surface folds and smooth morphology. When 9 wt% of MC 1799 was added to the 2 K WPU coating, the resulting formulation exhibited optimal performance, achieving an average particle size of 29 μm, along with superior self-healing and anti-corrosion properties. This research offers a novel approach for developing high-performance self-healing coatings with potential industrial applications.
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CORROSION SCIENCE
·
2021
·
IF 7.205
Yue Zhao,Xiao-Han Chen,Ji-Ming Hu
A novel and environmental-friendly pretreatment layer was prepared on a mild steel from an aqueous solution of polyvinyl alcohol (PVA)-grafted phytic acid (PA). This composite pretreatment layer provides greatly improved adhesion to the metal substrate, owing to the strong chelation and coordination interaction between PA and metals. Meanwhile, PVA modification produces highly porous structure in the hybrid layer. This is beneficial to the improvement of adhesion between metal substrates and subsequent polymer coatings. Further, the highly porous structure is good at loading -corrosion inhibitors, and the polymeric coatings painted on PVA-PA pretreatment layer pre-encapsulated with inhibitors exhibit satisfactory anticorrosion performance.
研究领域:
材料科学
·
腐蚀工程
·
表面化学
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FOOD CONTROL
·
2021
·
IF 5.548
Jianghao Yan,Min Li,Huifang Wang,Xiaojie Lian,Yanying Fan,Zhigao Xie,Baolong Niu,Wenfeng Li
Traditional plastic packages threaten the security of the environment and human beings. In this circumstance, novel biodegradable composite packages based on biodegradable materials have attracted increasing attention. In this study, the multilayer films containing chitosan and polyvinyl alcohol were prepared by Layer-by-Layer assembly technology with the addition of ferulic acid as a cross-linking agent. They demonstrated the enhanced performances in terms of tensile strength , water resistance, and antioxidant activity , while the interaction between PVA and chitosan was investigated by structure analysis. Successively, the addition of Cu 2 O@NCs further improved the tensile strength, water resistance, and antibacterial activities of films due to the well-dispersed nanoparticles in the matrix. The prepared films exhibited biodegradable properties and extended the shelf life of cherry tomatoes . In summary, the prepared composite films exhibited great potential for functional food packaging.
研究领域:
材料科学
·
生物学
·
食品科学
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DESALINATION
·
2022
·
IF 11.211
Xuechen Liang,Xiaopeng Pei,Yun Yang,Erna Jia,Hua Zhou,Sheng Xiang,Feng Lin,Ying Tan
Solar-driven interfacial evaporation has attracted significant research attention owing to its high conversion efficiency of solar energy and transformative industrial potential. The evaporation rate depends on the intrinsic properties of the photothermal conversion materials and external environmental factors. The development of a photothermal evaporation device with a high evaporation rate is urgently required for the application of photothermal interfacial evaporation. Here, we introduce a chimney in a hydrogel composite material to create a novel photothermal evaporation device. First, we fabricated a hydrogel composite material by in situ polymerization in the sponge. The porous structure of the sponge endows the resulting composite hydrogel with a high water-absorption rate. Thus, it improves the water supply rate of traditional hydrogel materials. Meanwhile, we applied a 26 cm high chimney to the photothermal evaporation device and demonstrated that the evaporation rate highly increased from 1.56 to 5.90 kg m −2 h −1 for pure water evaporation , 1.43 to 4.47 kg m −2 h −1 for seawater evaporation under 1 sun illumination . The evaporation system requires no additional energy input or other external conditions. In addition, the improved device structure is simple and can be applied to previously reported photothermal evaporation systems to achieve a higher evaporation rate.
研究领域:
材料科学
·
能源工程
·
环境科学
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