ELECTROCHIMICA ACTA
·
2014
·
IF 4.086
Qingwen Lu,Jun Yang,Wei Lu,Jiulin Wang,Yanna Nuli
A new type of semi-interpenetrating polymer network (Semi-IPN) gel polymer electrolyte (GPE) membrane based on the cross-linked poly(ethylene glycol) diacrylate- co -poly(vinylene carbonate) P(EGDA- co -VC) and PVDF-HFP linear polymer is successfully synthesized by UV-cured technology. The cross-linked P(EGDA- co -VC) can accommodate a large amount of liquid electrolyte inside the non-porous membrane via its strong interaction with Li + and solvents, which avoids the liquid electrolyte leakage. The ionic conductivity of the Semi-IPN GPE reaches 1.49 × 10 −3 S cm −1 at 25 °C and the electrochemical stability window up to 4.2 V (versus Li/Li + ). It demonstrates excellent interface stability to lithium metal electrode, superior thermal stability and good mechanical properties. A symmetric Li/Li cell with the above electrolyte displays a lower voltage polarization and longer valid cycle life than that based on conventional liquid electrolyte. Moreover, the Li/LiFePO 4 cells using the Semi-IPN GPE show superior cycling stability and rate performance comparable to the cell based on conventional liquid electrolyte. This Semi-IPN GPE is promising for rechargeable lithium batteries with high safety and energy density.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2017
·
IF 4.873
Shuyan Yang,Wenjian Wu,Yuanqi Jiao,Zhuodi Cai,Hongbo Fan
Sustainable self-reinforcement organic filler, which does not contribute to environmental pollution , has been realized in the rubber industry as an alternative to modifying inorganic fillers with coupling agents or preparing rubber fillers, such as carbon black, with petrochemical products that cause environmental problems. In this work, tannic acid (TA), the world's third largest class of plant components that are easily available, is used as a self-reinforcing organic filler to prepare nitrile–butadiene rubber/TA (NBR/T) composites. Results show that TA can melt partially under vulcanization to assemble a weak interpenetrating polymer network (IPN) structure by hydrogen bonds under cooling, which is responsible for the dramatic increase in the mechanical and flexible properties of NBR/T composites even at low TA dosage. This finding provides a new perspective in preparing high-performance and sustainable rubber composites without sacrificing fossil fuels or non-renewable environmental resources .
研究领域:
高分子材料科学
·
复合材料
·
可持续化学
·
橡胶工业
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2020
·Vol. 27
·期 5
·1-11
·
IF 2.426
Pan Zheng,Lv Yukai,Chen Yulong,Qian Xin
Waterproofing layers play a pivotal role in tunnel engineering and building basements. Magnesium acrylate (CA-Mg 2 ) shot-membrane waterproofing materials- commonly used as a waterproof layer- is a type of hydrogel. Poly(vinyl alcohol) (PVA) solution subjected to freezing/thawing treatment has been added to a CA-Mg 2 monomer, resulting in the formation of a CA-Mg 2 /PVA interpenetrating polymer network (IPN) hydrogel which can produced by a redox initiation system. This new IPN hydrogel contains not only a CA-Mg 2 network formed with Mg 2+ coordination bonds, but also a PVA network created by hydrogen bonding between hydroxyl groups. In comparison to CA-Mg 2 hydrogels, the fracture stress of the CA-Mg 2 /PVA hydrogel increased from 0.45 MPa to 0.72 MPa, elongation from 602% to 854%, and the self-healing efficiency of the IPN hydrogel reached 99.9% over 3 h. A new shot-membrane waterproofing materials based on the CA-Mg 2 /PVA hydrogel was prepared and its fracture stress was 1.44 MPa, and self-healing efficiency 80%, at 3 h. In addition, damage to the hydrogel could be repaired repeatedly.
研究领域:
材料科学
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土木工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Energy Technology
·
2018
·Vol. 6
·期 11
·2264-2272
·
IF 3.175
Xupo Liu,Yunfeng Zhang,Yazhou Chen,Cuicui Li,Jiaming Dong,Jiaying Wang,Zehui Yang,Hansong Cheng
Low methanol permeability is one of the most critical factors for proton exchange membranes utilized in direct methanol fuel cells (DMFCs). Here, sulfonated poly(ether ether ketone) (SPEEK) polymer chains are interpenetrated into the semi-interpenetrating polymer networks (semi-IPNs) constructed by the alkylation reaction between bromobenzyl groups of bromomethylated poly(phenylene oxide) and amine groups of 2,2′-(ethylenedioxy)bis(ethylamine) cross-linker. The influences of crosslinking network contents on the key properties of SPEEK membranes are systematically investigated. Dimensional stability and methanol-permeability resistance are enhanced as the increase of the crosslinking network contents. The relative selectivity is significantly improved due to the largely reduced methanol permeability. The DMFC assembled by the membrane with 20 wt.% crosslinking networks demonstrates four times higher power output than the Nafion 117 DMFC in 5 M methanol solution.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Shuqi Li,Zhiquan Jin,Weishun Lai,Haiyan Zhang,Da Wang,Shuang Song,Tao Zeng
In this work, the synthesis of a three-dimensional interpenetrating porous polymer network (K/Na-DA-PPN) was accomplished via the intramolecular linkage of cyano/hydroxyl donor–acceptor motifs and interlayer linkage of alkalis. In addition to the improved light harvesting and more exposed active edges arising from the multiscale pore structure, narrowed band gaps and fast charge transfer induced by intense charge delocalization were observed after introducing alkalis and DA motifs in the K/Na-DA-PPN polymer, as confirmed by experimental and theoretical studies. The synergy endows the obtained polymer photocatalyst with remarkable enhancement in H 2 evolution and Cr(VI) reduction performance and an optimized reaction rate that is 6 times and 4.3 times that of pristine CTF. The molecular design of specific linkages combined with structural control of polymer networks provides a novel strategy to synthesize polymer-based organic photocatalysts.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Zhixin Zhao,Zhaojie Yang,Minghua Zhang,Wenhao Du,Wenting Lan,Xi Zhang,Minmin Fan
To facilitate large-scale commercial applications of anion exchange membrane fuel cells, high ionic conductivity and long-term durability of anion exchange membranes (AEMs) are crucial. Herein, poly(styrene-co-4-vinylbenzyl chloride) (PSVBC) without aryl ether linkages was synthesized by the radical bulk polymerization using styrene (St) and 4-vinylbenzyl chloride (VBC) as monomers. Then, using PSVBC as the framework material and secondary anion carrier, and polyquaternium-10 (PQ10) as the main anion carrier, the tripartite cationic full-interpenetrating polymer network (F-IPN QPSVBC-PQ10) AEMs were fabricated by the chemical crosslinking method. Upon preparation, the AEMs with distinctive nano-sized microphase separation can maintain a suitable swelling capability, assuring stable mechanical properties, dimensional stability, alkaline stability, and oxidation resistance, surpassing their semi-interpenetrating polymer network QPSVBC-PQ10 AEM counterpart. Specifically, the ionic conductivity and peak power density of the optimally formulated AEM were 81.89 mS/cm and 119.31 mW/cm2, respectively. Meanwhile, 91.06% of the initial mass and 88.37% of the original ionic conductivity were maintained after successive 10-day oxidation test and 30-day alkali resistance test. In summary, the unique design of tripartite cationic F-IPN QPSVBC-PQ10 AEMs without aryl ether linkages is undoubtedly beneficial to further promote the development of high-performance anion exchange membranes.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2021
·
IF 7.991
Yang Lei,Xiaorong Lan,Zhoukun He,Anlin Yin,Wanyu Jin,Qinsheng Hu,Yunbing Wang
The bioprosthetic heart valve (BHV) has attracted considerable attention in clinical practice. However, complications of the BHV such as thrombosis, calcification, and early deterioration after implantation have limited further applications. In the present study, we provide a strategy to fabricate an anti-biofouling BHV by constructing interpenetrating polymer network structures on both inner and outer valve materials. We systematically investigated the morphologies, wetting properties, elemental compositions, stability of the extracellular matrix, transparency, mechanical properties, and anti-biofouling properties (e.g., anti-cell adhesion, resistance to bovine serum albumin protein adsorption, anticoagulant properties, and anti-calcification properties) of the modified BHV via both in vitro and in vivo experiments. Compared to the BHV without coating treatment, treated with heparin, or treated with a hydrophobic polydimethylsiloxane coating, the BHV treated with a hydrophilic coating containing both polyacrylic acid and polydimethylsiloxane exhibited better multifarious anti-biofouling properties. Our findings provide a method for the preparation of multi-antifouling medical materials with better synergistic hemocompatibility and anti-calcification.
研究领域:
生物医学工程
·
材料科学
·
心血管医学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2013
·
IF 2.206
Lei Xu,Guorong Shan
Simultaneous interpenetrating polymer networks (SIPNs) of linear polyurethane (PU) and linear poly(methyl methacrylate) (PMMA) were synthesized. Kinetic studies were carried out by means of titration of −NCO functional groups for PU and gas chromatography for methyl methacrylate (MMA). Factors that influence the kinetics of SIPN formation, such as the composition ratio, temperature, initiator concentration, catalyst concentration, time of initiator addition, and presence of the chain extender 1,4-butanediol, were investigated. It was found that all of the factors that influenced the system viscosity also affected the kinetics of SIPN formation and that the step-growth polymerization process was related to the radical polymerization process. If too much of the catalyst was added to the system, SIPNs would not completely form. The kinetics of polyurethane formation obeyed a second-order function during the early period of the reaction and a third-order function at high −NCO functional group conversions.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Yu Miao,Chong Wang,Jixiao Wang,Zhi Wang
Thin film composite reverse osmosis (TFC RO) membrane technology has seen widespread application in seawater/brackish water desalination and wastewater treatment . However, there are still problems such as unsatisfactory perm-selectivity and anti-fouling properties, and low feasibility of membrane manufacturing process. In view of the above problems, a novel UV-initiated modification process integrating with "Semi-interpenetrating polymer networks construction" and "Photo-Fries rearrangement initiation" is proposed. TFC RO membranes with both high perm-selectivity and anti-fouling properties were prepared by introducing polymerizable molecules (MAM, SA , AM) into the aqueous phase and conducting UV irradiation during interfacial polymerization (IP) process. The results showed that under the brackish water test conditions, the water flux and NaCl rejection of the optimal modified membrane (MAM-UV) were 77.5 L m −2 h −1 and 99.44%, respectively, which are 23.8% and 0.2% higher than those of the unmodified membrane (VIR-RO), respectively. The results of the anti-fouling test showed that MAM-UV exhibited good anti-fouling properties against both bovine serum albumin (BSA) and lysozyme (LYZ). In addition, the novel UV-initiated modification process proposed in this paper has broad prospects for industrial application because of its simple operation and easy scale-up.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 2
·128
·
IF 2.935
Bing Li,Qi Zhong,Dapeng Li,Ke Xu,Lu Zhang,Jiping Wang
The influence of ethylene glycol methacrylate (EGMA) to the hydration and transition behaviors of thermo-responsive interpenetrating polymeric network (IPN) hydrogels containing sodium alginate,N-isopropylacrylamide (NIPAAm), and EGMA were investigated. The molar ratios of NIPAAm and EGMA were varied from 20:0 to 19.5:0.5 and 18.5:1.5 in the thermo-responsive alginate-Ca2+/P(NIPAAm-co-EGMA) IPN hydrogels. Due to the more hydrophilicity and high flexibility of EGMA, the IPN hydrogels exhibited higher lower critical solution temperature (LCST) and lower glass transition temperature (Tg) when the ratio of EGMA increases. The swelling/deswelling kinetics of the IPN hydrogels could be controlled by adjusting the NIPAAm/EGMA molar ratio. A faster water uptake rate and a slower water loss rate could be realized by increase the amount of EGMA in the IPN hydrogel (the shrinking rate constant was decreased from 0.01207 to 0.01195 and 0.01055 with the changing of NIPAAm/EGMA ratio from 20:0, 19.5:0.5 to 18.5:1.5). By using 2-Isopropylthioxanthone (ITX) as a photo initiator, the obtained alginate-Ca2+/P(NIPAAm-co-EGMA360) IPN hydrogels were successfully immobilized on cotton fabrics. The surface and cross section of the hydrogel were probed by scanning electron microscopy (SEM). They all exhibited a porous structure, and the pore size was increased with the amount of EGMA. Moreover, the LCST values of the fabric-grafted hydrogels were close to those of the pure IPN hydrogels. Their thermal sensitivity remained unchanged. The cotton fabrics grafted with hydrogel turned out to be much softer with the continuous increase of EGMA amount. Therefore, compared with alginate-Ca2+/PNIPAAm hydrogel, alginate-Ca2+/P(NIPAAm-co-EGMA360) hydrogel is a more promising candidate for wound dressing in the field of biomedical textile.Keywords:thermo-responsive;interpenetrating polymeric network hydrogel;ethylene glycol methacrylate;N-isopropylacrylamide;cotton fabrics
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2013
·Vol. 49
·期 6
·1731-1741
·
IF 2.562
Wenwen Yu,Dezhi Zhang,Miao Du,Qiang Zheng
A series of novel polyurethane (PU)/epoxy resin (EP) graft interpenetrating polymer network (IPN) composites with graded length side chains were prepared from toluene diisocyanate (TDI), polytetrahydrofuran glycol (PTMG), EP, trimethylolpropane (TMP), and diol chain extenders. The effects of the side chain lengths, content, and groups on the damping properties and mechanical properties were investigated. Two damping peaks were observed in the PU/EP IPN system, indicating that the peak damping factor (tan δ ) increased with increased side chain length at low temperatures. The introduction of an apolar side chain slightly narrowed the damping range. However, the side chain carrying polar groups broadened the damping temperature range. The strong H-bond interaction between the ester group of side chain and the N H of hard segments in PU was believed to favor microphase separation to form a larger-sized domain and induce the appearance of the relaxation peak at high temperatures. Consequently, the effective damping temperature range was broadened. The side chain content tethered in the hard segment remarkably influenced the damping properties of PU/EP IPNs both at low and high temperatures. The width and intensity of the tan δ peaks of PU/EP IPNs increased with increased side chain content. The mechanical properties (tensile strength and elongation at break) were significantly affected by the side chain content. Thus, an important method of improving the mechanical damping of elastomers by controlling the side chain molecular structure was established.
研究领域:
高分子材料科学
·
功能高分子
·
阻尼材料
·
复合材料
·
聚合物共混物
·
材料力学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF PHARMACEUTICS
·
2011
·
IF 3.607
Wei Wu,Jing Liu,Shuqin Cao,Hong Tan,Jianshu Li,Fujian Xu,Xiao Zhang
A series of pH sensitive semi-interpenetrating polymer network (semi-IPN) structural hydrogels composed of poly(vinyl alcohol) (PVA) and 21-arm star poly[2-(dimethylamino)ethyl methacrylate] (star PDMAEMA) with different molecular weight were prepared. Riboflavin was used as a model drug to evaluate the drug loading capacities and drug release behaviors of the semi-IPN structural hydrogels. The molecular weight of the star PDMAEMA polymers was calculated by GPC, and the formation of semi-IPN structure was confirmed by FTIR and SEM. It was found that the molecular weight of star PDMAEMA has significant effect on the structure, swelling ratio and drug release behaviors of the semi-IPN hydrogel at different pH conditions. The results suggested that the PVA/star PDMAEMA-50,000 hydrogel exhibited highest swelling ratio and drug loading capacity. The pH-sensitive semi-IPN hydrogel based on star PDMAEMA could be a promising drug delivery system due to the controllable porous structure.
研究领域:
材料科学
·
药学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）