Journal of Materials Chemistry C
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2023
·Vol. 11
·期 40
·13857-13864
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IF 6.4
Wentang Wang,Xinyue Deng,Jinlong Lu,Chunhui Luo
Traditional conductive hydrogels are inevitably dehydrated by water evaporation when exposed to dry environments, which greatly retards their applications. Although great efforts have been devoted to reducing water evaporation, a combination of excellent stretchability, high sensitivity, non-freezing properties and self-adhesive capability has hardly been realized. Inspired by painting, an emulsion from poly butyl acrylate was prepared and coated onto the surface of a micellar cross-linked polyacrylamide (PAM) hydrogel to prepare a hydrophobic coated PAM gel (C-PAM). The presence of a hydrophobic layer endowed it with excellent anti-drying capability (84 ± 0.45% weight retention after 7 days under ambient conditions), while micelle-like aggregates imparted excellent extensibility (elongation at break = 5200%). The introduction of poly butyl acrylate also empowered self-adhesive properties. The C-PAM hydrogel could adhere to rubber, cardboard, metal, wood, glass and plastic with strengths of 38.59 ± 8.29, 47.42 ± 8.06, 15.53 ± 2.61, 46.54 ± 7.92, 14.71 ± 2.17 and 29.33 ± 3.11 kPa, respectively. The adoption of sodium chloride (NaCl) imparted high sensitivity (GF = 6.41) and anti-freezing properties (−20 °C). Bearing multi-functions, the reported strategy is expected to significantly broaden the applications of conductive hydrogels.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
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2022
·
IF 3.682
Guanglong Ma,Fangqin Ji,Weifeng Lin,Shengfu Chen
Nonfouling materials have attracted increasing interest for their excellent biocompatibility and low immunogenicity. Strong hydration is believed to be the key reason for their resisting capability to nonspecific protein adsorption. However, little attention has been paid to quantifying their strong water binding capacity. In this study, we synthesized four zwitterionic polymers, including poly(sulfobetaine methacrylate) (pSBMA), poly(carboxybetaine methacrylate) (pCBMA), poly(carboxybetaine acrylamide) (pCBAA) and poly(2-methacryloyloxyethyl phosphorylcholine) (pMPC), and compared non-freezing water of these zwitterionic polymers with typical antifouling polymer poly(ethylene glycol) (PEG) using differential scanning calorimetry (DSC). Non-freezing water of their monomers was also investigated. The non-freezing water of the polymers (per unit) is pMPC (10.7 ± 1.4) ≈ pCBAA (10.8 ± 1.5) > pCBMA (9.0 ± 0.6) > pSBMA (6.6 ± 0.4) > PEG20000 (0.60 ± 0.04). Similar trend is observed for their monomers. For all studied zwitterionic materials, they showed higher binding capacity than PEG. We attribute the stronger hydration of zwitterionic polymers to their strong electrostatic interactions.
研究领域:
生物材料学
·
高分子化学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Qingyu Wang,Chen Wang,Shang Ma,Ping Lu,Jian Dong
Kinetic hydrate inhibitors (KHIs) are polymers that play a vital role in gas energy production, transport, and storage. A series of polyaspartamides based on l-aspartic acid were designed to serve as potential KHIs. Tuning the fine structures of the polyaspartamides can inhibit the tetrahydrofuran hydrate formation more effectively than classical KHIs, i.e., poly(N-vinylcaprolactam) (PVCap) and poly(N-vinylpyrrolidone) (PVP). When the hydrophobic side chain is longer, the polyaspartamide is more effective. For elucidation of the polymer structure–property relationships in the inhibition of the clathrate hydrate, the molecular-level interactions between the polyaspartamides and tetrahydrofuran hydrate were studied. Dynamics of water surrounding the polymers probed by NMR relaxometry demonstrate that the polyaspartamides can bind tightly with water molecules in the hydrate, resulting in faster transverse relaxation times of the nonfreezable water. This phenomenon can be interpreted by quantum chemical simulations and nonfreezable bound water analysis by calorimetry. The simulations show that the interaction between the polyaspartamides and the clathrate hydrate is featured by the formation of strong hydrogen-bonding, rendering severe distortion and destruction of the clathrate cages. High levels of nonfreezable bound water per polymer repeat unit were found in the amphiphilic polymers. Polyaspartamide could be used as a green resource for prevention of gas hydrate formation in energy production.
研究领域:
材料科学
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化学工程
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能源技术
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产品关联
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Chuan Li,Xiaohong Zhu,Donghong Wang,Shuo Yang,Rong Zhang,Pei Li,Jun Fan,Hongfei Li,Chunyi Zhi
Hydrogels are widely used as quasi-solid-state electrolytes in aqueous batteries. However, they are not applicable in high-voltage batteries because the hydrogen evolution reaction cannot be effectively suppressed even when water is incorporated into the polymer network. Herein, by profoundly investigating the states of water molecules in hydrogels, we designed supramolecular hydrogel electrolytes featuring much more nonfreezable bound water and much less free water than that found in conventional hydrogels. Specifically, two strategies are developed to achieve this goal. One strategy is adopting monomers with a variety of hydrophilic groups to enhance the hydrophilicity of polymer chains. The other strategy is incorporating zwitterionic polymers or polymers with counterions as superhydrophilic units. In particular, the nonfreezable bound water content increased from 0.129 in the conventional hydrogel to >0.4 mg mg–1 in the fabricated hydrogels, while the free water content decreased from 1.232 to ∼0.15 mg mg–1. As a result, a wide electrochemical stability window of up to 3.25 V was obtained with the fabricated hydrogels with low concentrations of incorporated salts and enhanced hydrophilic groups or superhydrophilic groups. The ionic conductivities achieved with our developed hydrogel electrolytes were much higher than those in the conventional highly concentrated salt electrolytes, and their cost is also much lower. The designed supramolecular hydrogel electrolytes endowed an aqueous K-ion battery (AKIB) system with a high voltage plateau of 1.9 V and contributed to steady cycling of the AKIB for over 3000 cycles. The developed supramolecular hydrogel electrolytes are also applicable to other batteries, such as aqueous lithium-ion batteries, hybrid sodium-ion batteries, and multivalent-ion aqueous batteries, and can achieve high voltage output.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）