Applied Materials Today
·
2024
·
IF 7.2
Qingjie Liu,Laiyi Liu,Duan Fan,Shuang Xie,Chongyu Wang,Xue Gou,Xiaohong Li
Antibacterial properties are crucial for wound dressings to prevent bacterial infections that impede the healing process. However, achieving portability, permeability and biodegradability simultaneously in wound dressings is a challenging and essential task. Herein, we fabricated self-powered piezoelectric and biodegradable wound dressings with antibacterial properties using fibrous composites of poly(L-lactic acid) (PLLA), poly(ethylene glycol) (PEG) and tetragonal barium titanate (BT). During the initial treatment stage, the piezoelectricity of the composites effectively generated voltages to eliminate bacteria. As the composite degraded, the piezoelectricity dynamically and gradually diminished, resulting in relatively lower electrical signals to promote wound healing. The in-situ skin elongation of a rat in relaxed and active states was first evaluated through measuring the mechanical deformation of conductive nanofibers, illustrating that approximately 6 %−18 % strain was generated on a rat skin in daily life. Furthermore, the piezoelectric output of the fibrous composites was characterized by using a homemade dynamic stretching apparatus under the predetermined strain and frequency that mimicked the stretching deformation of the rat skin. To balance the biodegradability and antibacterial effects, PLLA composite fibers were optimized by incorporating 10 % PEG and 4 % BT, which effectively generated piezoelectric voltages from 2.2 to 4.2 V under the skin deformations from 6 % to 18 %. The fibrous composites produced reactive oxygen species to kill 99 % of bacteria in 60 min and maintained great biocompatibility even at the strain of 18 %. In vivo experiments demonstrated that the fibrous dressing led to a healing rate of 91 % on day 7 and a fully wound healing with an intact epidermis after 14 days. The study provides an innovative approach to develop self-powered piezoelectric and biodegradable fibrous composites for antibacterial wound healing applications.
研究领域:
生物医学工程
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材料科学
·
医学
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产品关联
DOI
高影响因子
Food Packaging and Shelf Life
·
2025
·
IF 10.6
Chao Yin,Jun Zheng,Yufan Yang,Xianwen Song,Miao Cui,Rujuan Shen,Yi Zhang
Plant polyphenols represent valuable additives for food packaging; however, their poor hydrophilicity necessitates complex pre-treatments. In this study, we propose a simple and eco-friendly strategy for the direct incorporation of hydrophobic polyphenols into packaging films. Using carboxymethyl chitosan and oxidized carrageenan as substrates, we successfully introduced hydrophobic polyphenols into multifunctional hydrogel films through borate ester bonds. The mechanical strength of these films was further enhanced by schiff base bonds. The prepared hydrogel films exhibited antibacterial rates exceeding 98 % against Escherichia coli and Staphylococcus aureus , and demonstrated excellent antioxidant and UV shielding properties. As the oxidation degree of carrageenan increased, the water vapor permeability rate of the hydrogel films decreased from 1.34 × 10⁻¹ ⁰ g·m⁻¹ ·s⁻¹ ·Pa⁻¹ to 3.13 × 10⁻¹ ¹ g·m⁻¹ ·s⁻¹ ·Pa⁻¹ , while the oxygen permeability rate decreased from 40.61 meq/kg to 20.04 meq/kg. This design effectively mitigates the deterioration of fruits and vegetables caused by dehydration and oxidation. Furthermore, the hydrogel films containing carrageenan with a medium oxidation degree exhibited superior mechanical properties, with tensile strength increasing by 4.8-fold and the ability to bear a load of 200 g. The banana preservation experiments demonstrated that hydrogel films can effectively delay the deterioration of bananas. Notably, the film exhibited excellent biodegradability, degrading by 90 % in soil within 60 days, underscoring its significant potential for developing functional and environmentally friendly food packaging systems.
研究领域:
食品科学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Shuwei Tang,Zhengguo Wu,Lansheng Wei,Jiayao Weng,Jiwen Luo,Xiaoying Wang
Conventional oil-water separation membranes are difficult to establish a trade-off between membrane flux and separation efficiency, and often result in serious secondary contamination due to their fouling issue and non-degradability. Herein, a double drying strategy was introduced through a combination of oven-drying and freeze-drying to create a super-wettable and eco-friendly oil-water separating aerogel membrane (TMA df ). Due to the regular nacre-like structures developed in the drying process and the pores formed by freeze-drying, TMA df aerogel membrane finally develops regularly arranged porous structures. In addition, the aerogel membrane possesses excellent underwater superoleophobicity with a contact angle above 168° and antifouling properties. TMA df aerogel membrane can effectively separate different kinds of oil-water mixtures and highly emulsified oil-water dispersions under gravity alone, achieving exceptionally high flux (3693 L·m −2 ·h −1 ) and efficiency (99 %), while being recyclable. The aerogel membrane also displays stability and universality, making it effective in removing oil droplets from water in corrosive environments such as acids, salts and alkalis. Furthermore, TMA df aerogel membrane shows long-lasting antibacterial properties (photothermal sterilization up to 6 times) and biodegradability (completely degraded after 50 days in soil). This study presents new ideas and insights for the fabrication of multifunctional membranes for oil-water separation.
研究领域:
材料科学
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环境科学
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微生物学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Mengxiang Zhu,Daofa Ying,Huaran Zhang,Xiaojuan Xu,Chunyu Chang
Biodegradable cellulose films have high mechanical strength, excellent flexibility, and good transparency, which are potential candidate materials to replace petroleum-based packaging materials and disposable products. However, the poor hydrophobicity of cellulose films seriously limits their practical application. Herein, self-healing hydrophobic films were fabricated by incorporating natural wax into cellulose matrix. The effects of types of natural waxes, wax content, and annealing temperature on the performances of films were systematically investigated. The resultant films exhibited good hydrophobicity (water contact angle: ∼120°), and high tensile strength (>120 MPa), which could be completely biodegraded in natural soil (within 81 days). Importantly, the self-healing of hydrophobic films could be achieved by releasing wax from inside to surface of cellulose matrix during the annealing process. This work demonstrated a facile strategy for designing and developing hydrophobic and self-healable cellulose-based materials for packaging materials to replace petrochemical plastics, which is conducive to alleviate environmental problems caused by nondegradable plastic pollution.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
Materials Chemistry Frontiers
·
2021
·Vol. 5
·期 21
·7903-7909
·
IF 6.482
Hao Sun,Tong Ji,Xinyuan Zhou,Hongjie Bi,Min Xu,Zhenhua Huang,Liping Cai
Plastics with excellent mechanical flexibility and optical properties have been widely used as substrates in flexible electronics and optoelectronics. However, the intrinsic conflicts among the poor accessibility and adverse environmental impacts limit the further development of plastics. Development of sustainable alternatives with competitive properties to replace synthetic plastics is urgently needed. Here, we propose a feasible and effective strategy with a micro/nanoscale structure design to convert bulk natural wood into a high-performance wood film with a high optical transmittance (77% at 550 nm) and high haze (73.5%). The resulting transparent wood films (TWF) exhibited a high tensile strength of 426 MPa. Moreover, the TWF had a lower environmental impact as it can be easily recycled and biodegraded under natural conditions. The unique characteristics make it a low-cost, high-performance, sustainable, and biodegradable alternative for flexible electronics, humidity sensors, and optical management devices.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Zede Yi,Shiyu Fu,Ying Wang,Jingbo Ai,Chuanshuang Hu,Shao-Yuan Leu,Altaf Halim
The mass consumption of plastic straws already seriously causes environmental pollution and harms human health, which urgently requires the manufacture of eco-friendly straws as alternatives. Herein, a facile approach was reported for producing tough, water-resistant, and biodegradable lignocellulose straws. The renewable agricultural residue (i.e., rice stalk) was pretreated with a deep eutectic solvent to redistribute lignin from the stalk fibers and obtain two cellulosic materials: lignin-regenerated cellulosic fiber (LRCF) and lignin-dissolved cellulosic fiber (LDCF). The LRCF and LDCF were refined and fibrillated and subsequently utilized to form a wet film. The wet film was then rolled into a tube without any adhesives and dried as straw products. The obtained straws exhibited excellent mechanical properties (maximum tensile strength and toughness of 90.2 MPa and 15.3 MJ/m3, respectively), water resistance (maximum water contact angle of 95.34°), and natural biodegradability (the fastest complete degradation in 25 days). These straws are fully derived from lignocellulose biomass and provide environmentally friendly alternatives to plastic straws.
研究领域:
环境科学
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材料科学
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生物质工程
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Materials and Technologies
·
2025
·
IF 9.2
Liang Chen,Xiancheng Zhang,Taotao Qiang,Qin Chen,Jinchao Li,Yaping Zhang
Paper is an important sustainable material widely used in various fields, whereas its strong hydrophilicity limits its broader application. Herein, water resistant and biodegradable waste gelatin-based coating as surface paper sizing that consists of concurrently hydrophilic and hydrophobic components was demonstrated. The hydrophilic gelatin and hydrophobic stearic acid individually fulfilled the loosely packed structure filling and the hydrophobic surface forming. Furthermore, γ-(2,3-epoxypropoxy) propytrimethoxysilane was blended with the two-phase emulsion via a scalable process, enabling the coated paper to attain the desired mechanical strength, water stability, and durability. After the sizing process, the coated corrugated paper exhibited high strength with a tensile index of 68.92 ± 2.98 N·m/g, which was greater than twice enhancement than that of initial one. The coated corrugated paper maintained good wet strength (tensile index ≈ 31.57 N·m/g), which was stronger than that of the dry initial corrugated paper, and retained almost the same surface water repellency after the abrasion resistance test, suggesting its good water stability and durability. Importantly, the coated corrugated paper could completely biodegrade (∼10 weeks) in soil. Thus, our proposed waste gelatin-based coating can be recommended as a sustainable and eco-friendly surface paper sizing, extending the broader application of paper materials in different usage scenarios.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 23
·期 23
·14863
·
IF 6.208
Huiyang Bian,Xuan Shu,Wenhao Su,Dan Luo,Maolin Dong,Xiuyu Liu,Xingxiang Ji,Hongqi Dai
The exploration of functional films using sustainable cellulose-based materials to replace plastics has been of much interest. In this work, two kinds of lignin nanoparticles (LNPs) were mixed with cellulose nanofibrils (CNFs) for the fabrication of composite films with biodegradable, flexible and ultraviolet blocking performances. LNPs isolated fromp-toluenesulfonic acid hydrolysis was easily recondensed and deposited on the surface of composite film, resulting in a more uneven surface; however, the composite film consisting of CNFs and LNPs isolated from maleic acid hydrolysis exhibited a homogeneous surface. Compared to pure CNF film, the composite CNF/LNP films exhibited higher physical properties (tensile strength of 164 MPa and Young’s modulus of 8.0 GPa), a higher maximal weight loss temperature of 310 °C, and a perfect UVB blocking performance of 95.2%. Meanwhile, the composite film had a lower environmental impact as it could be rapidly biodegraded in soil and manmade seawater. Overall, our results open new avenues for the utilization of lignin nanoparticles in biopolymer composites to produce functional and biodegradable film as a promising alternative to petrochemical plastics.
研究领域:
材料科学
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环境科学
·
林业工程
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2019
·
IF 4.191
Xiaoyun Xu,Kaili Song,Bin Xing,Wenfeng Hu,Qinfei Ke,Yi Zhao
High-efficiency, biodegradable and easy-desized cellulose nanocrystals (CNC) modified soy protein sizing agents were prepared by incorporating CNC as protein molecular extenders, crosslinkers and reinforcements in soy protein sizes system for multifunctional yarn coating against film thermal-embrittlement and yarn abrasion during slashing. In this research, we found CNC could endow soy protein with unfolded and trimly arranged molecular structure as well as enhanced intermolecular slippage, especially under high temperature conditions. Thermal-tenacity (work of fracture) and tensile strength at constant temperature of the soy films were improved 731% and 93.9%, respectively, after being modified by CNC. Compared with poor biodegradable polyvinyl alcohol (PVA) sizes films, thermal tensile strength of 10CNC modified soy films was 118% higher. Regarding sizing performance, CNC reinforced soy sizes had 51.4% and 5.09% higher adhesion properties and 43.1% and 38.3% lower friction coefficient to both cotton yarn and viscose/polyester (65/35) yarns compared to the soy sizes. In addition, the CNC-soy sizes agents possessed excellent desizing performance and biodegradability, indicating the great potential as a substitute of petro-based PVA sizes. Successful utilization of CNC-soy sizes will lead to large-quantity applications of soy byproducts, impelling high value addition to agricultural byproducts and sustainability in textile industry.
研究领域:
材料科学
·
纺织工程
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生物材料
✓ 已验证
产品关联
DOI
高影响因子
Applied Sciences-Basel
·
2021
·Vol. 11
·期 23
·11094
·
IF 2.679
Shanshuai Lu,Congling Li,Rui Liu,Aifeng Lv
Particulate matter (PM), composed of tiny solids and liquid droplets in polluted air, poses a serious threat to human health. Traditional air filters usually cause secondary pollution due to their poor degradability. Here, shellac, as an environmentally friendly natural organic material, was successfully applied to fabricate biodegradable air filters. Since pure shellac fiber shows poor mechanical properties and bad light transmittance, we then introduced a small amount of polyvinylpyrrolidone (PVP) in the shellac solution to prepare highly efficient air filter membranes by the electrospinning method. The prepared PVP-assisted shellac nanofiber membrane (P-Shellac FME) demonstrated improved filtration efficiencies as high as 95% and 98% for PM2.5and PM10, respectively. The P-Shellac FME also showed good stability, with filtration efficiencies still above 90% and 95% for PM2.5and PM10even after six hours of air filtering under high PM concentrations. The pressure drop going through the filter was only 101 Pa, which is also comparable to the value of 76 Pa obtained using commercial polypropylene nanofibers (PP nanofibers, peeled off from the surgical mask), indicating good air permeability of P-Shellac FME. Additionally, P-Shellac FME also showed the advantages of translucence, biodegradability, improved mechanical properties, and low cost. We believe that the P-Shellac FME will make a significant contribution in the application of air filtration.Keywords:shellac;nanofiber;air filtration;electrospinning method;biodegradability;translucence
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Jing Hu,Zhenjun Xiong,Yuqing Liu,Jinyou Lin
Conventional petroleum-based synthetic polymeric fiber filter materials for separation may cause secondary pollution to the environment due to their non-degradable properties. Herein, we report a facile method of preparation of a biodegradable composite filter that can achieve filtration for air by underlaying the commercialized cellulose paper towel under electrospun zein fibers. The morphology of zein fibers was successfully steered via varying the weight ratios of ethanol/deionized water mixture solvent, as a result, the round or flat ribbon fibers were obtained. The effect of zein fiber morphology on air filtration performance was investigated both experimentally and theoretically. It was found that the flat ribbon fiber filter had a higher filtration efficiency (99%) for PM0.3 removal and a lower pressure drop (109 Pa) compared with the round zein fiber filter. Notably, the as-prepared composite filter can be biodegradable easily, contributing to green ecological environment. This work shows an efficient way to develop biodegradable filtration materials with the cheap price, easy availability of component materials, exhibiting a great potential application in air filtration area.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2023
·
IF 4.3
Shen Zhi-Wei,Hu Shu-Feng,Zeng Chen,Kong Wei-Qing,Zhu Mei-Fang
With the global ban on plastics intensifying, the substitution of plastic with paper has garnered increasing attention. However, the inadequate water and oil repellency of pulp molding hinders its practical applications. Currently, the common method to enhance the oil and water repellency of pulp molding is by adding fluorinated water and oil repellents. Nevertheless, fluorinated compounds are environmentally and physiologically harmful. Therefore, the development of fluorine-free, water and oil repellent alternatives is crucial. In this study, chitosan and stearic acid were utilized as the first and second layers of the oil and water repellent coatings, respectively. The coated samples exhibited favorable water repellency, with a water contact angle of 116.4°, and excellent oil repellency, achieving a 12/12 rating on the kit scale. Importantly, the samples did not exhibit any leakage after being soaked in hot water and hot oil at 95±5 °C for 30 min, demonstrating remarkable performance as a barrier against hot water and oil. Moreover, the coated samples displayed outstanding mechanical properties, thermal stability, biodegradability, and recyclability. The approach presented in this study is simple, cost-effective, environmentally friendly, and represents a promising technique for producing fluoride-free, oil- and water-resistant pulp molding products.
研究领域:
材料科学
·
环境科学
·
化学工程
·
可持续性
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）