BIOMACROMOLECULES
·
2021
·
IF 6.988
Jing Yu,Kai Xu,Xiaojing Chen,Xiaodan Zhao,Yuxuan Yang,Dake Chu,Yongliang Xu,Qiang Zhang,Yanfeng Zhang,Yilong Cheng
Noncovalent cross-linked hydrogels with promising mechanical properties are on demand for applications in tissue engineering, flexible electronics, and actuators. However, integrating excellent mechanical properties with facile preparation for the design of hydrogen bond cross-linked hydrogels is still challenging. In this work, an advanced hydrogel was prepared from acrylamide and N-acryloyl phenylalanine by one-pot free-radical copolymerization. Owing to hydrophobicity-assisted multiple hydrogen bonding interactions among phenylalanine derivatives, the hydrogels exhibited fascinating mechanical behaviors: tensile strength of 0.35 MPa, elongation at break of 2100%, tearing energy of 1134 J/m2, and compression strength of 3.56 MPa. The hydrogels also showed robust elasticity and fatigue resistance, and the compression strength did not show any decline, even after 100 successive cycles, as well as promising self-recovery property. In addition, the cytotoxicity test in vitro proved that the hydrogel showed good biocompatibility with normal human liver cells (LO2 cells). The excellent stretchability, robust elasticity, high toughness, fatigue resistance, and biocompatibility of the hydrogel demonstrated its vast potential in the biomedical field and flexible electronic devices.
研究领域:
材料科学
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生物医学工程
·
组织工程
✓ 已验证
DOI
高影响因子
Small Science
·
2021
·Vol. 1
·期 9
·2100021
·
IF 0
Xiangyu Meng,Yufeng Sun,Mengzhou Yu,Zhiyu Wang,Jieshan Qiu
Li metal batteries offer the ultimate choice of high-energy power source, but suffer the performance decay and safety risk originated from notorious dendrite problem and infinite volume change of Li metal anode. Herein, it is reported to strengthen the Li metal anode by ultralight but highly robust MXene aerogels (ULRMA) with build-in strain-resistant and molecular-level lithiophilic properties. A hydrogen-bonding crosslinking strategy is developed for rapidly assembling 2D MXene to ULRMA at ambient conditions with less sacrifice of intrinsic properties of MXene. The ULRMA with an ultralow density below 10 mg cm −3 are favorable to maximize the merit of Li metal in gravimetric energy density while offering exceptional stability of porous frameworks against mechanical strain of long-term Li plating/stripping. The lithiophilic architecture with high conductivity and hierarchical porosity further largely reduces the potential polarization and guides the pattern of Li deposition. Uptaking Li metal into ULRMA leads to a stable Li metal anode with an ultralong lifetime of 1600 h with a high-rate response up to 20 mA cm −2 and high coulombic efficiency. It yields a highly robust Li metal anode with high effectiveness in engineering stable Li-ion and Li–S batteries even paring with commercial LiFePO 4 or sulfur cathode without nanostructuring.
研究领域:
材料科学
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能源存储
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电化学
✓ 已验证
DOI
Frontiers in Bioengineering and Biotechnology
·
2022
·
IF 6.064
Yu Han,Xiao Qiaohong,Qi Guilin,Chen Feixiang,Tu Biyue,Zhang Suo,Li Yinping,Chen Yun,Yu Hui,Duan Peng
Hydrogels with adhesive properties have the potential for rapid haemostasis and wound healing in uncontrolled non-pressurized surface bleeding. Herein, a typical hydrogen bond-crosslinked hydrogel with the above functions was constructed by directly mixing solutions of humic acid (HA) and polyvinylpyrrolidone (PVP), in which the HA worked as a crosslinking agent to form hydrogen bonds with the PVP. By altering the concentration of HA, a cluster of stable and uniform hydrogels were prepared within 10 s. The dynamic and reversible nature of the hydrogen bonds gave the HA/PVP complex (HPC) hydrogels injectability and good flexibility, as well as a self-healing ability. Moreover, the numerous functional groups in the hydrogels enhanced the cohesion strength and interaction on the interface between the hydrogel and the substrate, endowing them with good adhesion properties. The unique chemical composition and cross-linking mechanism gave the HPC hydrogel good biocompatibility. Taking advantage of all these features, the HPC hydrogels obtained in this work were broadly applied as haemostatic agents and showed a good therapeutic effect. This work might lead to an improvement in the development of multifunctional non-covalent hydrogels for application to biomaterials.
研究领域:
生物材料学
·
医学工程
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2019
·
IF 3.375
Yuetao Liu,Kaiming Zhang,Jiawen Sun,Junguo Yuan,Zhengyi Yang,Chuanhui Gao,Yumin Wu
The formation of reversible hydrogen bonds is a promising strategy for cross-linking organosilicon elastomers, which can yield the fascinating properties. Herein, we reported a new type of self-healing silicone rubber (hydrogen bond cross-linked silicone rubber, HBSR) cross-linked by the multiple hydrogen bonds with α,ω-aminopropyl poly(dimethylsiloxane) and ethylene carbonate based on the nonisocyanate reaction. The multiple hydrogen bonds between the carbonyl and imino groups as well as the generated hydroxyl groups were proved by the variable temperature Fourier transform infrared analysis. This ultimately produced a hydrogen bond cross-linked network of HBSR. The tensile strength of HBSR could reach to 0.52 MPa that was equal or even better than the conventional room-temperature vulcanized silicone rubber without fillers. The thermodynamic tests indicated that HBSR exhibited good thermal stability, which was not influenced by the generated hydroxyl groups. Moreover, the multiple hydrogen bonds led to a thermal-induced self-healing efficiency of 88.5% and good cyclic self-healing ability of HBSR. This study provided an alternative method to fabricate the self-healing silicone rubber with the hydrogen bond interactions. The type of silicone rubber might be applied into the soft robotics, wearable electronics, and stretchable circuit structure.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 74
·69966-69972
·
IF 3.289
Yu Guan,Leishan Shao,Dongyu Dong,Fei Wang,Yuliang Zhang,Yinghan Wang
Polymer composites exhibit very high strength but this is usually found to be at the expense of toughness, which greatly limits their application in many fields. Inspired by the hierarchical architectures in spider silk, we attempted to combine simultaneous high strength and toughness via a hydrogen bonding network. PVA composites with tannic acid (TA) molecules were fabricated by a green and easy-to-scale-up water casting method. The results showed that the hydrogen bonding crosslinking between PVA and TA has strong effect on the Tg, crystallinity, thermal stability and mechanical properties of PVA. In addition, the PVA composite films with 3 wt% TA exhibited, simultaneously, the best tensile strength and toughness, improving by 46% and 27% compared to the pure PVA, respectively.
研究领域:
高分子材料
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生物医学工程
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纳米复合材料
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生物启发设计
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组织工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Wen-Feng Ren,Jia-Bo Le,Jun-Tao Li,Yi-Yang Hu,Si-Yu Pan,Li Deng,Yao Zhou,Ling Huang,Shi-Gang Sun
Binders play a crucial role in the development of silicon (Si) anodes for lithium-ion batteries with high specific energy. The large volume change of Si (∼300%) during repeated discharge and charge processes causes the destruction and separation of electrode materials from the copper (Cu) current collector and ultimately results in poor cycling performance. In the present study, we design and prepare hydrogen-bonding cross-linked thiourea-based polymeric binders (denoted CMC-co-SN) in consideration of their excellent binding interaction with the Cu current collector and low cost as well. The CMC-co-SN binders are formed through in situ thermopolymerization of chain-type carboxymethylcellulose sodium (CMC) with thiourea (SN) in the drying process of Si electrode disks. A tight and physical interlocked layer between the CMC-co-SN binder and Cu current collector is derived from a dendritic nonstoichiometric copper sulfide (CuxS) layer on the interface and enhances the binding of electrode materials with the Cu current collector. When applying the CMC-co-SN binders to micro- (∼3 μm) (μSi) and nano- (∼50 nm) (nSi) Si particles, the Si anodes exhibit high initial Coulomb efficiency (91.5% for μSi and 83.2% for nSi) and excellent cyclability (1121 mA h g–1 for μSi after 140 cycles and 1083 mA h g–1 for nSi after 300 cycles). The results demonstrate that the CMC-co-SN binders together with a physical interlocked layer have significantly improved the electrochemical performance of Si anodes through strong binding forces with the current collector to maintain electrode integrity and avoid electric contact loss.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Fei Wang,Mingrui He,Yanlei Su,Wei Wang,Yanan Liu,Jing Xue,Jialin Cao,Jianliang Shen,Runnan Zhang,Zhongyi Jiang
Construction of zero-flux-decline membrane surfaces with superior antifouling properties is in great demand for the treatment of oil-water mixture. Inspired by nature, simultaneously incorporating hydrophilic and low-surface-energy groups to form a chemically heterogeneous hydrogel surface holds great promise. In this study, membranes with heterogeneous hydrogel surfaces were fabricated through a one-step reaction enhanced surface segregation method. In details, we synthesized a fluorine-containing copolymer as the modifier in casting solution, and designed tannic acid (TA) aqueous solution as the coagulation bath. During non-solvent induced phase separation, TA can in situ crosslink the modifier at the water-polymer interface through hydrogen bonds , forming a heterogeneous hydrogel layer over the membrane surface. Meanwhile, the hydrophilicity of TA rendered the hydrogel underwater superoleophobic properties. The thickness and chemical composition of the hydrogel layer were facilely manipulated by varying the TA concentration. To our surprise, the unique physicochemical characteristics of heterogeneous hydrogel layer greatly fortified the antifouling mechanisms on membrane surfaces, rendering the membrane zero-flux-decline feature with a flux of 330 L m −2 h −1 at 0.05 MPa during a 60-h cross-flow filtration of five different oil-in-water emulsions.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Heli Yu,Mingzhu Bi,Cuijuan Zhang,Tianjie Zhang,Xiaoning Zhang,Hongtao Liu,Jianli Mi,Xiangqian Shen,Shanshan Yao
Construction of high sulfur loading electrode is one of the effective ways to achieve high specific energy density lithium/sulfur batteries. Therefore, the optimization of polymeric binders has been considered as effective strategy to improve the volume changes of sulfur electrodes during charge/discharge processes. In this work, an effective route for the preparation of three dimensional polymeric binder (PAA-PANI) via multiple hydrogen bonds was developed and fabricated through in situ polymerization between polyacrylic acid (PAA) and polyaniline (PANI), which possess bifunctional effects on high sulfur loading cathodes in lithium/sulfur batteries. The carboxyl polar groups of PAA could effectively adsorb polysulfides and the conductive PANI enhance the electronic conductivity of the sulfur electrode. The three dimensional polymeric binder of PAA-PANI has enhanced the active material adhesion, mechanical properties and electronic conductivity, which decreased overpotential polarization, improved the lithium ions diffusion coefficient, and reduced the self-discharge. More importantly, the PAA-PANI functional binder could alleviate the expansion of high sulfur loading electrode. Taking advantages of PAA-PANI binder, the carbon nanotubes modified sulfur electrode (CNTs@S; sulfur content: 84.3 wt%) with PAA-PANI binder exhibits an initial discharge capacity of 906 mAh g –1 at 2.56 mA cm –2 (0.3 C) under a sulfur loading of 5.1 mg cm –2 . Even at higher current density of 8.54 mA cm –2 (1 C), the PAA-PANI binder electrode delivers a high capacity of 846 mAh g –1 . Moreover, with an extremely high areal sulfur loading of 17 mg cm –2 , the cathode shows an areal specific capacity of 16.7 mAh cm –2 .
研究领域:
电化学
·
能源材料
·
高能电池
·
功能高分子
·
界面化学
·
储能技术
✓ 已验证
DOI
高影响因子
POLYMER
·
2018
·
IF 3.483
Haofei Li,Hongbo Wang,Dongfei Zhang,Ziyang Xu,Wenguang Liu
Recently, we have constructed a high strength and thermoplastic supramolecular poly( N -acryloyl glycinamide) (PNAGA) hydrogel which can be developed as printable bioinks. However, the PNAGA hydrogel is low in stiffness and toughness, potentially limiting its application as load-bearing soft tissue scaffolds. In this work, we fabricate a supramolecular polymer double-network hydrogel based on hydrogen bonding crosslinked PNAGA and Fe 3+ -coordination crosslinked sodium carboxymethyl cellulose (CMC). The combined hydrogen bonding and ionic crosslinks contribute to high-strength nonswellable PNAGA/CMC-Fe hydrogels (Tensile strength of 2.9 MPa and compressive strength of 7.3 MPa at 80% strain without fracture) and stiffness (Young's modulus of 1.2 MPa and compressive modulus of 1.5 MPa). Furthermore, these reversible double physical crosslinks enable the PNAGA/CMC-Fe hydrogels to dissipate energy efficiently with a high toughness (12.3 MJ m −3 ) and tear energy (3700 J m −2 ), meanwhile imparting self-recoverability, anti-fatigue ability and self-healability to the network. This cytocompatible supramolecular polymer double network hydrogel with excellent multifaceted mechanical performances are promising to exploited as load-bearing soft tissue engineering scaffolds .
研究领域:
生物材料学
·
组织工程
·
高分子科学
·
再生医学
·
生物力学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）