ELECTROCHIMICA ACTA
·
2014
·
IF 4.086
Bin Jiang,Hongting Pu,Haiyan Pan,Zhihong Chang,Ming Jin,Decheng Wan
Fluorine-containing polyimide (FPI) with hydroxyl groups is synthesized from 4,4′-(hexafluoro isopropylidene) diphthalic anhydride (6FDA), 2,2-bis (3-amino-4-hydroxyphenyl) hexafluoropropane (6FAP), and 4,4′-diaminodiphenyl ether (ODA) via high temperature polycondensation . Thereafter, alkynyl groups are introduced into FPI. During the preparation of the composite membrane, alkynyl groups on FPI react with azido methyl of 4,4′-bis(azido methyl) biphenyl via click chemistry and form semi-interpenetrating polymer network (semi-IPN) structure within the composite membranes. The mechanical properties, thermal behavior, water uptake, swelling ratio, proton conductivity, oxidative stability, as well as the performance in single cell operation are investigated. Compared to pure perfluorosulfonic acid (PFSA) polymer membrane, the composite membranes based on semi-IPN of FPI and PFSA exhibit improved mechanical properties, excellent thermal and dimensional stabilities, and suitable proton conductivity. The tensile strength of the composite membranes ranges from 28.0 to 67.0 MPa. With increasing FPI content in the membranes, the dimensional stability of the composite membranes increases. The composite membranes have the proton conductivity from 4.3 × 10 −2 S·cm −1 to 1.0 × 10 −1 S·cm −1 at 100 °C and also have good performances as proton exchange membrane (PEM) in single cell at 80 °C.
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
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Linlin Wang,Fenghua Zhang,Shanyi Du,Jinsong Leng
The triple-shape memory polymer (TSMP) can be programmed into two temporary shapes (S1 and S2) and shows an ordinal recovery from S2 to S1 and eventually to the permanent shape upon heating, which realizes more complex stimulus-response motions. We introduced a novel strategy for forming triple-shape memory cyanate ester (TSMCE) resins with high strength and fracture toughness via three-step curing, including four-dimensional (4D) printing, UV post-curing, and thermal curing. The obtained TSMCE resins presented two separated glass transition temperature (Tg) regions due to the formation of an interpenetrating polymer network (IPN), which successfully endowed the polymers with the triple-shape memory effect. The two Tg increased with the increasing cyanate ester (CE) prepolymer content; their ranges were 82.7–102.1 °C and 164.4–229.0 °C, respectively. The fracture strain of the IPN CE resin was up to 10.9%. Moreover, the cooperation of short carbon fibers (CFs) and glass fibers (GFs) with the polymer-accelerated phase separation resulted in two well-separated Tg peaks exhibiting better excellent triple-shape memory behaviors and fracture toughness. The strategy for combining the IPN structure and 4D printing provides insight into the preparation of shape memory polymers integrating high strength and toughness, multiple-shape memory effect, and multifunctionality.
研究领域:
材料科学
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高分子化学
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智能材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2019
·
IF 0
Tao Xu,Hang Li,Chao He,Hao Xu,Xin Song,Haifeng Ji,Changsheng Zhao
Wastewater containing positively-charged toxins and pathogenic bacteria can cause high environmental danger which seriously threatens human health. Fixed-bed column has emerged as a practical technique for water remediation owing to its simple operation, high efficiency and cost-effective implementation. However, how to prepare adsorbents with adequate dimensional stability, high adsorption capability and antibacterial property remains an open question. Herein, semi-interpenetrating network (Semi-IPN) microspheres were prepared by combining poly (ether sulfone) with poly (acrylic acid) (PAA) hydrogels via electrospraying technique coupled with subsequent in-situ cross-linking polymerization. Then, Ag nanoparticles were immobilized on the PAA hydrogels to endow the microspheres with antibacterial property. The as-prepared multifunctional microspheres exhibited superior dimensional stability. The compressive stress of the microspheres reached up to 17.90 MPa (with a strain of 60%), which was over 400-fold larger than that of the PAA hydrogels. The swelling ratio of the microspheres under pH 10 was 1.75 g/g and declined by 90.17% compared to that of the PAA hydrogels. Furthermore, the column filled with the microspheres showed ultrahigh removal ratios for positively-charged toxins (98.03%, 99.57%, 99.42% and 98.21% for methylene blue, Cu 2+ , Cd 2+ and Pb 2+ , respectively) and robust bacterial killing efficiency (100% for either Escherichia coli or Staphylococcus aureus ). Overall, we present a method on developing promising multifunctional hydrogel microspheres with enhanced antibacterial activities as well as adsorbent with higher adsorption capacities. We envision that the proposed multifunctional microspheres could overcome the limitations facing the fixed-bed column and be applied for treatment of water polluted by positively-charged toxins and pathogenic bacteria.
研究领域:
环境科学
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材料科学
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生物学
✓ 已验证
DOI
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Pengfei Cao,Tianhui Cheng,Weixing Min,Mingli Wang,Shuangshuang Zhu,Lengwan Li,Shilun Gao,Zhenxi Li,Jia Tian,Dandan Yang,Huabin Yang
Although solid polymer electrolytes (SPEs) hold great promise for high-performance lithium metal batteries (LMBs), the low ionic conductivity and narrow electrochemical window limit their practical application. Herein, we report an ethyl cyanoacrylate (ECA) based semi-interpenetrating polymer network (SIPN) structured SPEs without a traditional solvent removal process. The fabricated deep eutectic solvent (DES) is utilized as both a plasticizer and initiator to trigger the anionic polymerization of ECA to form the linear PECA (DES-PECA). The polymer network formed by copolymerization of poly (ethylene glycol) dimethacrylate and methyl methacrylate is further incorporated to afford the SIPN-based SPEs with lithium difluoro(oxalato)borate as an additive (DESD-SIPN). Benefitting from the unique SIPN structure with a crosslinked polymer network affording mechanical robustness and linear polymer providing high mobility, the DESD-SIPN achieves a decent tensile strength of 1.3 MPa and a high ionic conductivity of 0.139 mS cm-1. The DES and PECA also enable the DESD-SIPN with a voltage stability of up to 4.97 V. Accordingly, the LCO/DESD-SIPN/Li cell stably cycles for 500 times at 1 C and 4.6 V, and the NCM811/DESD-SIPN/Li cell delivers a steady cycling performance at different cutoff voltages of 4.3 V, 4.5 V, and even 4.7 V.
研究领域:
材料科学
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能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Kaiwen Zhong,Hongyu Yang,Chendong Shuang,Guang Zhang,Dong Chen,Aimin Li
Polyacrylic anion exchange resin (AER) is effective in removing many contaminants in water, but their poor mechanical strength limits their industrial application. In this study, AER-1 with poly (acrylic acid) /phenolic interpenetrating polymer networks was prepared under acidic conditions, and the resin was characterized and evaluated for its adsorption performance. The sphericity after attrition of AER-1 was 97.5 %, while the AER was only 57.1 %. This improved mechanical strength could be partially attributed to hydrogen bonds. Moreover, the increased pore volume and average pore size results in the enhanced adsorption amount from 0.22 mmol/g to 0.26 mmol/g at equilibrium with 0.05 g resin in 100 mL of ibuprofen solution (0.15 mM). An increasing kinetic constant from 0.024 to 0.033 can be obtained from the pseudo-first order kinetic fitting ( R 2 > 0.99). Compared with AER-1, AER-2 synthesized under alkaline conditions shows a less improved performance in mechanical strength and pore structure. The Langmuir adsorption isotherm model ( R 2 > 0.98) is more consistent with the experimental data, indicating monolayer adsorption on a homogeneous surface. Small molecule acidic organics are more competitive due to the expansion of resin pore channels. Gallic acid (80 mg/L) lowers the adsorption capacity by 64.3 %, while humic acid only produces a 10 % reduction in adsorption capacity because of pore exclusion. Excellent reusability of AER-1 for ibuprofen adsorption has been demonstrated by adsorption-regeneration cycle experiments.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Yifan Sha,Tianhao Yu,Tao Dong,Xing-long Wu,Haoyu Tao,Haitao Zhang
A solid-state electrolyte has attracted great interest on energy storage and conversion, especially for lithium metal batteries (LMBs). However, its practical application is limited by poor ionic conductivity at room temperature and dendrite formation. Herein, a polymerized ionic liquid (PIL)-based solid electrolyte with the structure of a semi-interpenetrating polymer network is designed to enhance the ionic conductivity for LMBs. A one-step in situ cross-link [Vmim1O2][TFSI] is introduced in the poly(vinylidene fluoride)–hexafluoropropylene matrix to fabricate the electrolyte. The obtained solid electrolyte exhibits a high ionic conductivity (1.06 × 10–3 S cm–1 at 25 °C) and a wide electrochemical window (5.50 V vs Li/Li+). The assembled lithium symmetrical cell can maintain a stable voltage range over 1000 h, and the mechanism is confirmed by density functional theory calculations. The employed MD simulations indicate a coordination of the TFSI– anion with both Li+ and the polycation in different systems and demonstrate the feasibility of the Li+ transport improvement based on the PIL. Li/LiFePO4 batteries also show good cycle performance whose reversible capacity is about 153.7 mA h g–1 with 96.53% Coulombic efficiency at 0.1 C and 25 °C. This research shows that this PIL-based solid electrolyte possessed broad application for next-generation LMBs.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
Journal of Coatings Technology and Research
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2024
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IF 2.3
Wu Jiangqin,Xue Qianwen,Zhang Yuxuan,Lv Zaosheng,Huang Yanfen,Lei Yang
The exceptional oil–water selectivity and low oil adhesion of hydrogel materials have garnered considerable attention within the realm of oil–water separation. In this paper, semi-interpenetrating polymer networks (semi-IPN) were introduced into polyvinyl alcohol (PVA)/polyacrylamide (PAM) hydrogels, which improved the mechanical properties of the hydrogels due to the presence of physical and chemical crosslinking. The incorporation of SiO 2 nanoparticles into the hydrogel improved the surface energy and roughness, which resulted in superhydrophilic and underwater superoleophobic properties of PVA/PAM/SiO 2 semi-IPN hydrogel-coated stainless-steel mesh (SSM). The SSM coated with hydrogel demonstrated excellent resistance to underwater oil, as evidenced by a contact angle of 156°. The oil–water separation flux was as great as 1.2 × 10 4 L m −2 h −1 , and the separation efficiency exceeded 98%. Furthermore, PVA/PAM/SiO 2 semi-IPN hydrogel-coated SSM is one of the best materials for solving oil–water separation issues due to its recyclability, self-cleaning properties, and stability under acidic and alkaline conditions.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jingyang Xu,Pengpeng Lu,Jie Zhao,Xin Zhao,Weijun Tian,Weihua Ming,Luquan Ren
Dual functional coatings with anti-fog and antimicrobial performances greatly enhance the safety and reliability of medical detection devices, but are prone to mechanical damage, resulting in reduced performance and a shorter service lifespan. Herein, a semi-interpenetrating polymer network (SIPN) coating, featuring hydrophobic-hydrophilic balanced copolymers as bulk chains and host–guest inclusion compounds (HGICs) as cross-linkers, is reported, which demonstrates particularly effective anti-fog and antibacterial performances, along with a surprisingly fast self-healing capability under various scenarios. This HGIC-based coating displayed remarkable anti-fog capability over a wide temperature range from −20 ℃ to 85 ℃ and exhibited reliable antibacterial activities (≥98 %) against both gram-positive and gram-negative bacteria. Also, this coating showed extremely high self-healing ability (≥92 % recovery rate) within just 20 s, significantly outperforming traditional self-healing systems. These findings support the development of functional coatings that can highly maintain rapid self-healing performance while also providing anti-fog and antibacterial properties in medical detection devices.
研究领域:
材料科学
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生物医学工程
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高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER TESTING
·
2019
·
IF 2.943
Yun-Fei Zhang,Ming-Ming Guo,Ya Zhang,Chak Yin Tang,Can Jiang,Yuqing Dong,Wing-Cheung Law,Fei-Peng Du
Stretchable conductive hydrogels have received significant attention due to their possibility of being utilized in wearable electronics and healthcare devices. In this work, a semi-interpenetrating polymer network (SIPN) strategy was employed to fabricate a set of flexible, stretchable and conductive composite hydrogels composed of polyvinyl alcohol (PVA) in the presence of glutaraldehyde as the crosslinker, HCl as the catalyst and poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) as the conductive medium. The results from FTIR, Raman, SEM and TGA indicate that a chemical crosslinking network and interactions of PVA and PEDOT:PSS exist in the SIPN hydrogels. The swelling ratio of hydrogels decreased with increasing content of PEDOT:PSS. Due to the chemical crosslinking network and interactions of PVA and PEDOT:PSS, PVA networks semi-interpenetrated with PEDOT:PSS exhibited excellent tensile and compression properties. The tensile strength and elongation at breakage of the composite hydrogels with 0.14 wt% PEDOT:PSS were 70 KPa and 239%, respectively. The compression stress of the composite hydrogels with 0.14 wt% PEDOT:PSS at a strain of 50% was about 216 KPa. The electrical conductivity of the hydrogels increased with increasing PEDOT:PSS content. The flexible, stretchable and conductive properties endow the composite hydrogel sensor with a superior gauge factor of up to 4.4 (strain: 100%). Coupling the strain sensing capability to the flexibility, good mechanical properties and high electrical conductivity, we consider that the designed PVA/PEDOT:PSS composite hydrogels have promising applications in wearable devices , such as flexible electronic skin and sensitive strain sensors.
研究领域:
材料科学
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生物医学工程
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电子皮肤
✓ 已验证
DOI
高影响因子
Polymers
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2018
·Vol. 10
·期 2
·153
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IF 2.935
Dajiang Kuang,Feng Wu,Zhuping Yin,Tian Zhu,Tieling Xing,Subhas C. Kundu,Shenzhou Lu
Silk fibroin hydrogel is an ideal model as biomaterial matrix due to its excellent biocompatibility and used in the field of medical polymer materials. Nevertheless, native fibroin hydrogels show poor transparency and resilience. To settle these drawbacks, an interpenetrating network (IPN) of hydrogels are synthesized with changing ratios of silk fibroin/N-Vinyl-2-pyrrolidonemixtures that crosslink by H2O2and horseradish peroxidase. Interpenetrating polymer network structure can shorten the gel time and the pure fibroin solution gel time for more than a week. This is mainly due to conformation from the random coil to the β-sheet structure changes of fibroin. Moreover, the light transmittance of IPN hydrogel can be as high as more than 97% and maintain a level of 90% within a week. The hydrogel, which mainly consists of random coil, the apertures inside can be up to 200 μm. Elastic modulus increases during the process of gelation. The gel has nearly 95% resilience under the compression of 70% eventually, which is much higher than native fibroin gel. The results suggest that the present IPN hydrogels have excellent mechanical properties and excellent transparency.Keywords:silk fibroin;PVP;interpenetrating polymer network;hydrogel;protein biopolymer
研究领域:
生物材料
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医学高分子材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Qingye Liu,Xiaohui Wang,Yarui Hou,Yue Cheng,Jianfeng Zhang,Longqiang Xiao,Jingtai Zhao,Wei Li
Inspired by intelligent biomaterials which often have flexible responsiveness to multiple environmental cues and strengthen their mechanical properties by trainings, emerging soft actuators require programmable manipulation. Currently, the integration of such characteristics as rapid self-strengthening, strain-adaptive stiffening and smart actuation, into a single hydrogel actuator is urgently needed. Here, we report a self-strengthened hydrogel actuator based on the semi-interpenetrating polymer network consisting of polyvinyl alcohol (PVA) and poly(N-isopropylacrylamide) (PNIPAm), which can display diverse programmable actuations by responding to temperature/salt stimuli. In the design, the layer of freeze-thawed PNIPAm/PVA (PPGel-F) is assembled with another original PNIPAm/PVA hydrogel layer (PPGel) into one device. By taking advantage of the PVA crystalline nanofibrils in the PPGel-F matrix, the differentiated swelling degree across the bilayer structure gives rise to asymmetric deformations and the resultant shape transformation. Moreover, upon the mechanical training with less than 100 cycles, the anisotropic arrangement of PVA nanofibrils through strong hydrogen bonding interactions can swiftly immobilize the amorphous polymer chains orientation along the tensile direction. This enhances the strain-induced crystallization, thereby generating the rapid self- strengthening behavior. The proposed work provides potential solution for constructing dynamically adaptive hydrogel systems that can mimic biological tissues for more intelligent soft robotics and bionic research.
研究领域:
材料科学
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生物仿生学
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软体机器人
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Jin Wang,Hucheng Chen,Yahui Xiao,Xianghu Yu,Xiaoxuan Li
Polyelectrolyte hydrogels have great potential as gel-polymer electrolytes (GPE) because of their low-cost and environmental benefits. Here a polyelectrolyte hydrogel of high ionic conductivities and mechanical properties was developed via the formation of semi-interpenetrating polymer network (s-IPN) GPE, which consists of Poly (2-acrylamide-2-methyl propane sulfonic acid) (PAMPS), poly(vinyl alcohol) (PVA) and sodium montmorillonite(MMT). The additions of MMT and PVA can both increase the ionic conductivities and the tensile strength of PAMPS. PAMPS/PVA/MMT s-IPN GPE show excellent overall performance of ionic conductivity of 6.4×10 -2 S cm -1 and tensile strength of 24.3 MPa when the ratio of PVA/AMPS is at 0.8:1 and MMT is at 7wt%. When PAMPS/PVA/MMT s-IPN is used as a GPE in supercapacitors, it exhibits good electrolyte behavior with its specific capacitance of 208 F g -1 , close to that of using 4M KOH aqueous solution electrolyte.
研究领域:
材料科学
·
能源技术
✓ 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）