REACTIVE & FUNCTIONAL POLYMERS
·
2021
·
IF 3.975
Hafezeh Nabipour,Haoxin Niu,Xin Wang,Sadia Batool,Yuan Hu
There are many applications for epoxy resin as a coating material in the automotive, electronics, and aerospace industries. However, when derived from petrochemical industries, adversely affect the environment, as they are rigid and resistant to recycling due to inherent cross-linked structure. In the present study, we prepared green epoxy resin from renewable resources, able to replace the conventionally produced DGEBA thermoset . Initially, we synthesized an epoxy thermoset from vanillin-derived Schiff base epoxy monomer (VTA-EP) that was thermally cured with bio-based 5, 5′-methylenedifurfurylamine (DFA). Due to the unsaturated double bond in cured VTA-EP/DFA thermoset displayed a relatively high glass transition temperature (T g ~ 170 °C) than the DGEBA/DDM system. Also, tensile strength (60 MPa), storage modulus (3271 MPa), and elongation at break (2.8%) were higher. Additionally, the peak of heat release rate (PHRR) and the total heat release (THR) of the cured VTA-EP/DFA resin decreased, and LOI and UL-94 ratings were improved. The green epoxy thermoset exhibited good dissolution in various acidic conditions due to the degradability of the Schiff base network in contrast to DGEBA/DDM. This work demonstrates that the combination of biomass with Schiff base structure provides a versatile platform for the fabrication of multifunctional vanillin-derived epoxy thermosets.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
Materials Today Sustainability
·
2022
·
IF 7.244
J. Liang,Z. Wang,Q. Ye,L. Qiao,H. Jiang,Y. Guo,Z. Fan
Melt-blown fabric masks have the drawbacks of the supply-demand imbalance, the risks of respirable infection, and environmental pollution . Therefore, it is urgently needed to exploit a new mask material with excellent air-filtration, antimicrobial, and degradable properties. In this study, a new sodium alginate (SA)/nanosilver composite mask intermediate filter layer (named as SAg air filter) is prepared by a simple and quantifiable pumping-injecting method to substitute the traditional melt-blown fabric. Subsequently, the prepared SAg air filter is softened with glycerol solution to improve the flexibility. Compared with the intermediate filter layer of the melt-blown fabric mask, the SAg air filter has more excellent performances, such as environmental friendliness, degradability , large-scale preparation, stable and long-lasting air filtration , good impermeability, as well as suitable breathability. What's more, the air filter combines physical and mechanical filtration, Coulomb adsorption of nano-silver, and antimicrobial air purification through the SAg aerogel network to ensure more comprehensive air purification and filtration. The novel SAg air filter will have a broad application prospect in the mask market, and eventually extend the new application of SA aerogel in the air filtration field.
研究领域:
材料科学
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医学
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环境科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2022
·
IF 6.449
Wei Wang,Dong Wang,Bihua Xia,Ting Li,Yang Wang,Xuhui Zhang,Huiyu Bai,Mingqing Chen,Weifu Dong
To alleviate the exhaustion of petrochemical resources and reduce their use in the polyurethane industry, biopolyols derived from dextrin and glycerol were prepared and used in rigid polyurethane foam (RPUF). Through simple and eco-friendly physical mixing, biopolyols with different dextrin contents were obtained, and the effects of different biopolyols on the foaming process, combustion behavior, mechanical properties and biodegradability were investigated. The apparent density of the RPUF ranged from 31.4 kg/m 3 to 49.1 kg/m 3 . Compared with conventional foam, RPUF based on dextrin and glycerol had a higher normalized compressive strength and biodegradability. In addition, when the ratio of dextrin to glycerol in the biopolyol was 1/1, the self-extinguishing time of the foam was only 9 s, and the LOI value was 14.5% higher than that of conventional foam. These results demonstrated that dextrin-glycerol polyols can completely replace petrochemical polyols to prepare water-foamed RPUF with excellent comprehensive properties.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Xianchun Li,Xin Li,Wuliang Ma,Jinxia Ma
Developing degradable plastics with excellent mechanical strength and wet stability from renewable and biodegradable biomass resources remains challenging. Here, we propose a simple one-step strategy for the in-situ multiscale dissolution of cellulose and crosslinking with 1,4-butanediol diglycidyl ether (BDDE) within a mixture of BDDE and AlCl 3 /ZnCl 2 aqueous solution at room temperature. This strategy enables the synthesis of cellulosic paper-based bioplastics with high mechanical strength and wet stability from cellulose paper. In this process, conventional cellulose paper is partially dissolved, and simultaneously, BDDE forms chemical crosslinking with undissolved micro-level, nano-level cellulose fibers and dissolved cellulose macromolecules through an autocatalytic effect from AlCl 3 /ZnCl 2 aqueous solution, resulting in multiscale physicochemical entanglements and multiple hydrogen bonds. Hence, the prepared bioplastic's dry and wet strength reached 58.2 MPa and 24.2 MPa, respectively, about 6.9 times and 71.2 times higher than untreated paper-based materials. The prepared bioplastic showed excellent wet stability, biosafety, and biodegradability. The density functional theory (DFT) simulation data indicates that Al 3+ , Zn 2+ ions, and freely hydrated hydrogen protons are crucial to the dissolving-co-crosslinking system. This strategy involves only green and recyclable chemicals, offering a promising pathway for producing strong and biodegradable cellulosic paper-based bioplastics as an alternative to nondegradable plastics.
研究领域:
材料科学
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环境科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Qin Wu,Xin Cai,Meng Sha Ma,Xuan Zhang,Keyin Liu,Nan Nan Xia
The practical applications of grass plastic mulch films are limited because their residues turn into microplastics and enter the food chain. This study solves this problem by preparing a degradable cellulose–lignin–waterborne polyurethane composite grass paper film. First, waterborne polyurethane prepared using a mild method was composited with lignin via an addition reaction and the formation of hydrogen bonding between the –OH groups of lignin and the –NCO and –OH groups of polyurethane. Finally, the as-prepared polyurethane–lignin composite was applied as a coating on the surface of a paper-based material to prepare a grass paper mulch film. The relationship between lignin content and the molecular weight, thermal stability, mechanical properties, polymer network crosslinking density, antioxidant capability, and light transmittance of the coating was studied, revealing that higher lignin contents considerably improved the barrier and mechanical properties of the coating and grass paper mulching film. In particular, a lignin content of 20 % resulted in a grass paper mulching film with outstanding grass pressing performance and degradability. Therefore, the multifunctional, ecofriendly grass paper mulch film prepared from cellulose–lignin–waterborne polyurethane composite materials provides an innovative approach to solve the pollution problem of traditional grass plastic paper mulch.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Chan Hee Jung,Myung-Seok Lee,Dal Yong Kim,Min Gyu Shin,Soyeon An,Dong-Ku Kang,Jeong F. Kim,Seung-Eun Nam,Sung-Joon Park,Jung-Hyun Lee
Thin-film composite (TFC) membranes are employed in water treatment and thus significantly contribute to environmental remediation efforts. However, the underlying porous support membrane of TFC membranes is fabricated using large amounts of synthetic chemicals and organic solvents, which can adversely affect the environment. Hence, the development of ecofriendly porous membranes is necessary. In this study, we fabricated an all-biopolymer (chitosan (CHS) and cellulose)-based, mechanically robust porous membrane via aqueous solution processes. A porous CHS membrane was formed on cellulose-based traditional Korean paper as a backing fabric through pH-induced aqueous phase separation, followed by chemical crosslinking with pyrogallol, a plant-derived natural compound. The resultant highly porous (overall porosity = 68.1 ± 1.9%), mechanically reinforced CHS membrane had higher compaction resistance than commercial ultrafiltration membranes under hydrodynamically pressurized conditions (up to 15.5 bar). The prepared CHS membrane was subsequently used as a support for fabricating a TFC membrane via interfacial polymerization. The CHS-supported TFC membrane exhibited competitive reverse osmosis performance (water permeance = 1.68 ± 0.13 L m −2 h −1 bar −1 , NaCl rejection = 99.4 ± 0.1%) and long-term durability. The CHS membrane also showed excellent biodegradability, which enabled its ecofriendly disposal. Our study provides a sustainable platform for fabricating green membranes for various separation applications.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Min Guan,Yang Liu,Hong Du,Yinying Long,Xingye An,Hongbin Liu,Bowen Cheng
Paper-based wearable sensors are becoming popular in flexible electronic devices, owing to their good degradability, high permeability, low cost, and scalable production. However, the strong water absorption of the paper limits its application in wearable strain sensors. Herein, a hydrophobic and breathable paper/MXene/sizing agent (PMS) flexible strain sensor is reported by facile successive dip coating methods. The MXene layer endows the composite with high sensing performance while the sizing agent layer ensures its hydrophobicity. This PMS sensing film demonstrated high sensitivity (gauge factor, GF = 161) in the bending angle of 0-120° and excellent durability of 100,000 cycles in bending deformation of 30°. Benefiting from the paper substrate and the biomass sizing agent, this sensor exhibits superior hydrophobicity (contact angle, CA = 133.4°), good air permeability (154.08 mm/s), and high degradability. For the proof of concept, human movement detection and wearable Morse code wireless transmission systems under water conditions are demonstrated. This work presents an appropriate strategy for building comfortable and versatile paper-based wearable electronics.
研究领域:
材料科学
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生物医学工程
·
柔性电子
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产品关联
DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2023
·Vol. 224
·期 24
·2300359
·
IF 2.5
Kuan Zhang,Lin Dang,Junliang Zhang
Silicone rubbers are widely employed in various fields such as electronics, electrical engineering, mobile communications, aerospace, and automotive industries. However, silicone rubbers are typically challenging to reprocess and degrade. Moreover, with the advancement of technology, higher demands are placed on its thermal conductivity and dielectric properties. In this study, diglycidyl ether terminated polydimethylsiloxane is cured by 4,4′-dithiodibutyric acid which contains dual dynamic covalent disulfide and ester bonds with triazobicyclodecene as the ester exchange catalyst to prepare silicone rubber vitrimers (SRVs) through a casting method. The SRVs demonstrate a relatively higher intrinsic thermal conductivity of 0.26 W (m⁻ 1 K⁻ 1 ) compared to ≈0.20 W (m⁻ 1 K⁻ 1 ) of conventional silicone rubber. Besides, the SRVs exhibit very low and stable dielectric constant and dielectric loss at both low and high frequencies (X-band). The lowest dielectric constant and dielectric loss tangent at 10 GHz are 2.75 and 0.0650, respectively. Besides, the dual dynamic covalent bonds enable the SRVs to have excellent reprocessability and fast degradability. Moreover, the SRVs reveal UV-shielding capability, as the transmittance of the SRVs is 0% from 200 to 400 nm of UV light.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Xiaoxue Shi,Yun Zhu,Guiyou Wang
An ideal tissue engineering scaffold should possess mechanical properties and biodegradability that are compatible with the host tissue. To address this issue, the ring-opening polymerization of ε-caprolactone (ε-CL) was conducted in conjunction with polyether polyols, poly(propylene glycol) (PPG) and poly(trimethylene ether) glycol (PO3G), to synthesize the triblock copolymers PCL-PPG-PCL and PCL-PO3G-PCL. Subsequently, biodegradable polyurethanes (PUs) were synthesized utilizing these triblock copolymers as the soft segments, while a PU incorporating poly(ε-caprolactone) (PCL) as the soft segment served as a control group. The influence of block polyols on the structural, morphological, mechanical, and degradation properties of the resulting materials was systematically investigated. The findings indicate that the PU from the triblock copolymers exhibited lower modulus, tensile strength, and hardness, a higher degradation rate compared to the PU from PCL. Additionally, these polyether-ester-based PUs demonstrated superior elastic recovery at strains exceeding 100% in comparison to the control PU sample. Biodegradable PUs were fabricated into porous scaffolds through electrospinning, and the mechanical properties of these scaffolds were tailored by adjusting the fiber diameters, achieving a modulus as low as 2 MPa. The biodegradable PUs developed in this study possess a low initial modulus and tunable mechanical properties, indicating their potential application in scaffolding.
研究领域:
生物材料学
·
组织工程学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Qiansen Wang,Cong Jiang,Hong Wang,Xingming Jin,Yehan Tao,Jie Lu,Jian Du,Haisong Wang
The development of sustainable agriculture has boosted an increase in demand for biodegradable and multifunctional biomass-based mulch films. Herein, a sort of eco-friendly and multifunctional soybean protein isolates crosslinked gelatins (SPI-c-Gel) composite mulch films were elaborately designed through the Schiff base reaction. The formation of physical entanglement and chemical cross-linking between the molecular chains of SPI and Gel could effectively dissipate the loading energy and thereby strengthen the resistance of the composite mulch films to water penetration. Specifically, the maximum tensile strain and tensile stress were observed to increase from 4.05 MPa at 73.3 % for pure SPI film to 14.7 MPa at 151 % for optimized SPI-c-Gel 0.3 mulch film. The swelling rate in water declined from 280 % for pure SPI film to 141 % for SPI-c-Gel 0.3 composite film. Furthermore, the fabricated composite mulch film exhibited satisfied water retention, urea slow-release properties, and biodegradability. The application experiments of SPI-c-Gel 0.3 composite mulch have shown that the seeds grew faster when cabbage seeds were covered by such mulch film during seed germination. Our findings provide a novel strategy for regulating the physical and chemical properties of biopolymer-based multifunctional mulch films, which may be employed to promote the development of sustainable agriculture.
研究领域:
农业科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2024
·
IF 9.7
Gang Wang,Quancheng Shu,Jinzhi Sun,Yucan Liu,Xiaoyong Yang,Hao Lin,Jing Ding,Yanxiang Zhang,Lijuan Lan,Hongwei Sun
To recycle the nutrients in spiramycin (SPM) fermentation residue (SFR) through biological methods, acid hydrothermal treatment (AHT) was employed as pretreatment to enhance SFR biodegradability. The results showed that the degradation rate of residual SPM in SFR reached 100% after 120 min at 100℃ and 0.30 M acid with a 30.5% and 89.7% increase in proteins and polysaccharides, respectively. The SPM degradation was faster at higher acidity and temperature. However, elevated SPM concentration and the presence of protein, humic acid, and polysaccharide inhibited SPM degradation. The disintegration of SFR was evidenced by changes in its microstructure and could be predicted through the release of dissolved organic matter. Eight major SPM intermediates were identified with lower mutagenicity and antibacterial activity testing against Staphylococcus aureus . These results demonstrate that AHT not only disintegrates SFR but also degrades the residual SPM antibiotics, which implies the possibility for practical applications.
研究领域:
环境科学
·
微生物学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Jiao Feng,Yangbing Wen,Wenmin Yang,Xianghua Hu,Yecheng Xu,Zhen Fang
The development of biodegradable films with enhanced mechanical performance is of great importance for environmental concerns. Inspired by the unique multiple hydrogen bonding of spider silk, in this work, we developed a tough polyvinyl alcohol (PVA)-based, TEMPO-oxidized cellulose nanofibers (TOCNF)-enhanced film with outstanding stretchability, mechanical strength, fatigue resistance, and biodegradability by constructing an interpenetrating polymer network (IPN) with abundant hydrogen bonds via a combination of in situ radical-crosslinking and solvent casting method. The film incorporated 1 wt% of TOCNF, namely P/A-TCF1, exhibits excellent biodegradability, outstanding elongation (470 %), significant toughness (143 MJ/m 3 ), healable efficiency (90 %) and high tensile strength (45 MPa), surpassing the performance of a vast of commercially-available films. Importantly, the P/A-TCF1 film can withstand 5000 actual 180° folds without causing any structural damage, and the tensile strength remains almost 90 % of its original value. This strategy provides a novel approach for exploring exceptional fold-resistant films.
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
危险品化学品经营许可证（带存储）