Surfaces and Interfaces
·
2025
·
IF 6.3
Yinchuan Pu,Duoduo Huang,Su Wang,Wei Xu
Developing robust and durable superhydrophilic surfaces on polyethylene terephthalate (PET) films is critical for advancing their applications in self-cleaning and biomedical technologies. In this study, a coating solution containing polyethyleneimine and HDI polyisocyanate was bar-coated onto PET film surfaces and subsequently cross-linked to form a dense R-NH-CO-NH-R' covalent network. After modification, the PET film surfaces demonstrated superhydrophilicity (WCA=0°) accompanied by a significant increase in surface energy to 79.4 mN/m, while achieving excellent 5B-grade adhesion. Furthermore, when exposed to 40-hour immersion in aqueous solutions, the modified surfaces maintained their superhydrophilicity (0° WCA) with essentially unchanged surface energies. The coatings showed near-complete surface coverage along with substantial covalent bonds retention. Such crosslinking construction approach via bar-coating exhibits promising potential for PET films in superhydrophilic applications.
研究领域:
生物医学工程
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材料科学
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表面工程
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产品关联
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 23
·3437
·
IF 4.7
Wei Wang,Ke Zheng,Wenzheng Zhao,Shenglong Zheng,Hui Wan,Jingran Gao
Tung oil pressing generates a substantial amount of tung cake waste rich in protein, which can be used to develop a novel wood protein adhesive. This study determined the optimal alkali treatment parameters based on NaOH concentration, reaction temperature, and reaction time. Potassium permanganate (KMnO4) and methyl trimethoxy silane (MTMS) were then sequentially added for cross-linking modification to achieve the optimal preparation process for the tung cake protein adhesive. Bonding strength was tested on pressed boards, and various characterization techniques, including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Thermogravimetric analysis (TG/TGA), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM), were used. The results indicated the following: (1) Optimal preparation conditions: The best preparation process for the adhesive involved 30% NaOH at 50 °C for 50 min, with the addition of 12% KMnO4and 6% MTMS, meeting Class II plywood standards. (2) XRD and FTIR analyses revealed that carbohydrates in the tung cake oxidized and reacted with protein amino groups. The active groups in the protein cross-linked with MTMS, forming a spatial network structure, reducing hydrophilic groups, and enhancing water resistance. (3) TG/TGA and DSC showed that the thermal stability of the modified adhesive improved, thermogravimetric loss was reduced, and curing performance was enhanced. (4) SEM verified the adhesive’s reaction mechanism, demonstrating that MTMS filled the protein structure unfolded by KMnO4, forming a three-dimensional network and improving bonding strength. This study successfully developed a new, formaldehyde-free, environmentally friendly tung cake protein adhesive with excellent performance.
研究领域:
材料科学
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环境科学
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林产化学加工工程
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Hao Zheng,Xiliang Chen,Zhengchun Cai,Bo Fu,Haian Xia
Wood tar is an unavoidable by-product during a slow-pyrolysis process of biomass, which is usually discarded as a waste and results in environment pollution. Recently, wood tar has been used as a starting material for carbon electrodes because of its thermoplasticity and high carbon content. However, wood tar is mainly composed of various light phenolic molecules, which usually leads to a low carbonization yield after carbonization and an inferior electrochemical performance after activation. In this work, in order to improve the carbonization rate and electrochemical performance of these materials, wood tar was first condensed and crosslinked with formaldehyde and urea via a condensation reaction to produce condensed macromolecular resins, which were then carbonized at 550°C and activated with KOH at 800°C to prepare high-performance nitrogen-doped carbon electrodes for supercapacitors. The samples possess high carbonization yield, large specific surface area (3515.1 m 2 g −1 ) and moderate nitrogen content (1.11 %). The high-performance carbon electrodes fabricated by this method achieves a high capacitance of 437.8 F g −1 (6 M KOH electrolyte) at 1 A/g −1 . The assembled supercapacitor has an energy density of 13.41 Wh kg −1 at a power density of 124.93 W kg −1 . And the capacitance retention was essentially 100 % after 10000 cycles at 5 A g −1 . The study presents an innovative strategy for the production of porous carbon for supercapacitors using wood tar and improves carbonization yield via condensation cross-linking modification.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
MATERIALS SCIENCE FORUM
·
2019
·
IF 0
Shan Shan Liu,He Yi Ge,Yu Zou,Juan Chen
Wood plastic composite (WPC) has been rapidly developed because of its environmental friendliness and sustainability. In order to improve the interfacial compatibility between plant fiber and polypropylene (PP) matrix, three different cross-linking modification methods were used to treat corn straw fiber (CSF). These methods were glutaraldehyde/chitosan (GA/CS) crosslinking modification, KH560/chitosan crosslinking modification and glutaraldehyde/polyvinyl alcohol (GA/PVA) crosslinking modification. The characterization and the mechanical analysis of WPC showed that different cross-linking methods have different morphology on the surface of CSF. Compared with CSF-PP, the bending strength of GA/CS-CSF-PP and GA/PVA-CSF-PP were increased by 11.1% and 16.7%, respectively. This study provided appropriate methods to improve the interface compatibility between plant fiber and resin matrix.
研究领域:
材料科学
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环境科学
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DOI
RSC Advances
·
2015
·Vol. 5
·期 73
·59273-59285
·
IF 3.84
Jing Wang,Xiaoyan Lin,Xuegang Luo,Wenhui Yao
Linked carboxymethyl cellulose microspheres loaded with lanthanum(III) (linked-CMC–La) were fabricated with glutaraldehyde, from lanthanum carboxymethyl cellulose microspheres (CMC–La), and used to remove fluoride from aqueous solution. Characterization by SEM, resistance to acid and alkali, TG, pHpzc and FT-IR was used to distinguish the superiority of the two adsorbents. The results showed that the linked-CMC–La had a higher decomposition temperature (200 °C) than CMC–La (190 °C) and a better resistance to acid and alkali compared with CMC–La. Batch adsorption experiments were also performed, varying factors of pH, initial fluoride concentration, and contact time. The results showed that the maximum removal efficiencies (REs) of CMC–La and linked-CMC–La were about 98.85% and 99.31%, respectively, when the fluoride concentration was 40 mg L−1 at pH 4.0. The adsorption process could be described well using the Langmuir isotherm model. The adsorption kinetics data was fitted well using a pseudo-second-order model. The analysis of the adsorption and desorption of the linked-CMC–La and CMC–La revealed that crosslinking had no obvious effect on the removal efficiency or mechanism of the adsorption and desorption of the two absorbents. The surface adsorption occurred between the linked-CMC–La and fluoride due to Lewis acid–base interaction and supplemented with electrostatic attractions.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Zongrong Yang,Chengqing Yuan,Xiuqin Bai,Shaoli Jiang,Zhiwei Guo,Georges Limbert
Water-lubricated bearings are prone to severe wear under low-speed and heavy load conditions. Improving the tribological properties of bearing materials can effectively improve bearings’ reliability and working life. Ultrahigh molecular weight polyethene (UHMWPE) materials are modified using a silane coupling agent and peroxidant. The tribological properties and interface properties of the material were characterized and verified. The results showed that the cross-linked modified UHMWPE improved the material’s interface properties and wear resistance. The electrostatic potential energy of the material was increased significantly. Under low speed and heavy load conditions, the wear amount dropped by nearly 20%. These research results provide an experimental basis for the functional design and performance enhancement of water-lubricated bearing materials.
研究领域:
材料科学
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机械工程
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高分子科学
·
摩擦学
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产品关联
DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Jiawei Wei,Ruru Liu,Fang Wang,Xiangying Chen,Zhongjie Zhang
In present work, citric acid was used as a cross-linking agent to perform surface hydrophobization of magnesium oxysulfate (MOS) whiskers and bamboo flour (BF), producing PP/MOS/BF ternary composites via melt extrusion and injection molding processes. The results show that MOS increase the crystallization temperature, melting temperature, and degree of crystallinity of the composites, acting as heterogeneous nucleation agents. BF inhibits the crystallization process of PP, but when compounded with MOS, it enhances the crystallization performance of the ternary composites, leading to an increase in crystallinity. Additionally, the rigidity of MOS and the flexibility of BF synergistically enhance the adhesion between PP and the filler, thereby improving the mechanical properties of the ternary composites. Furthermore, the storage modulus and loss modulus of the ternary composites increase, while the loss factor and bonding factor decrease, with no significant change in the glass transition temperature. The good compatibility and bonding strength generated between MOS whiskers, BF, and PP result in optimal dynamic mechanics. For the M-B-30-3:1 sample, its tensile performance reaches 33.74 MPa, as well as bending strength and notched impact strength of 28.87 MPa and 9.77 kJ/m 2 , respectively.
研究领域:
材料科学
·
高分子科学
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复合材料
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表面化学
·
纳米技术
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产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Qiaoguang Li,Wei Wei,Wenqing Xiao,Yunliang Li,Zekun Chen,Guijun Xie,Yigang Wang
We have successfully developed a molecular design strategy to synthesize a hydrogenated rosin-modified isocyanatopropyltriethoxysilane crosslinking agent (HRIS) with organic and inorganic active groups. Then curing it, rosin-based silicone rubber chemically cross-linked modified pine (RSP) is formed. This process enables the organic integration of fire-retardant silicon, nitrogen elements, and the rigid hydrogenated phenanthrene ring structure of rosin with the internal and external surfaces of the pine’s porous structure through chemical bonding. In the channels, rosin-based silicone rubber with 48.81 % of carbon, 42.96 % of oxygen, and 8.23 % of silicon, respectively was observed. The degradation mechanism coupled with LOI (limiting oxygen index) testing revealed that the RSP exhibited enhanced flame retardancy, with its LOI significantly increasing from 24.68 % to 25.4 %. Additionally, it exhibited higher thermal stability up to 330℃ than pine, indicating that the fire-retardant performance of RSP was effectively enhanced through the crosslinking modification with HRIS and PDMS (hydroxyl-terminated polydimethylsiloxane). During the thermal degradation process, RSP will produce gaseous cyclic siloxane molecules such as D3 (hexamethylcyclotrisiloxane), D4 (octamethylcyclotetrasiloxane), D5 (decamethylcyclopentasiloxane), etc. This study demonstrated that a new type of adhesive has been synthesized, but the influence of byproducts on the entire system should be considered in application, which is of significance for indicating the direction.
研究领域:
高分子科学
·
材料工程
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化学合成
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阻燃材料
·
木材科学
·
热分析
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）