A nonswellable gradient hydrogel with tunable mechanical properties,Journal of Materials Chemistry B

当前位置： X-MOL 学术 › J. Mater. Chem. B › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

A nonswellable gradient hydrogel with tunable mechanical properties
Journal of Materials Chemistry B ( IF 6.1 ) Pub Date : 2020/02/22 , DOI: 10.1039/d0tb00296h
Pingping Xu _{1,

2,

3,

4,

5} , Huaxiu Xu _{1,

2,

3,

4,

5} , Yang Yang _{1,

2,

3,

4,

5} , Xionglei Wang _{1,

2,

3,

4,

5} , Wenli An _{1,

2,

3,

4,

5} , Yan Hu _{1,

2,

3,

4,

5} , Shimei Xu _{1,

2,

3,

4,

5}

Affiliation

Susceptibility of traditional hydrogels to water leads to the deterioration of their mechanical properties and dimensional instability. Inspired by bone tissues, here, we report a nonswellable gradient hydrogel with adjustable mechanical properties via a simple acid-heat treatment of polyamide-based hydrogels. Both the hydrophilicity/hydrophobicity and crosslinking degree of the gel can be simultaneously regulated by taking advantage of the conversion of amide groups to imide groups in the hydrogel. A gradient imide structure is formed with a dense layer near the surface of the gel. The resultant hydrogel has no size change both in water and 0.9 wt% NaCl solution while it shows high strength with a compressive stress of 70 MPa at 70% strain at a higher imidization degree. At a lower imidization degree, the gel has excellent fatigue resistance and resilience and can return to its original state after 5 cycles of 90% strain.

中文翻译：

具有可调机械性能的不可溶胀梯度水凝胶

传统水凝胶对水的敏感性导致其机械性能和尺寸不稳定性下降。受骨组织的启发，在这里，我们报告了一种可膨胀的梯度水凝胶，其机械性能可通过聚酰胺基水凝胶的简单酸热处理。通过利用水凝胶中酰胺基向酰亚胺基的转化，可以同时调节凝胶的亲水性/疏水性和交联度。梯度酰亚胺结构在凝胶表面附近形成有致密层。所得的水凝胶在水和0.9重量％的NaCl溶液中均没有尺寸变化，同时在较高的酰亚胺化度下以70％的应变表现出高强度和70MPa的压缩应力。在较低的酰亚胺化度下，该凝胶具有出色的抗疲劳性和回弹性，并且在经过5次90％应变的循环后可以恢复其原始状态。

更新日期：2020-04-01

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11