基于纤维增强和磁场诱导构建坚韧、抗疲劳各向异性水凝胶及其性能研究(英文) |
| |
作者姓名: | 陈琴 陈凯 武盟 张欣悦 冯海燕 冯存傲 王大刚 李晓伟 张德坤 曾宏波 |
| |
作者单位: | 1. School of Chemical Engineering and Technology,School of Materials Science and Physics,School of Mechatronic Engineering,China University of Mining and Technology;2. State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences;3. State Key Laboratory of Tribology in Advanced Equipment,Tsinghua University;4. Department of Chemical and Materials Engineering,University of Alberta |
| |
基金项目: | financially supported by the Natural Science Foundation of Jiangsu Province (BK20211243);;Jiangsu Provincial Key Research and Development Program (BE2022708);;the Tribology Science Fund of State Key Laboratory of Tribology in Advanced Equipment (SKLTKF21B15);;the Open Fund of State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics (LSL-2107); |
| |
摘 要: | 生物组织(如肌腱、软骨等)不仅具有优异的强度、模量和韧性,而且具有长期稳定性,可承受数百万次高应力循环而不断裂,其疲劳阈值超过1000 J m-2.相比之下,尽管合成水凝胶在强度、模量、韧性和其他性能方面与天然软组织相当,但这些增韧水凝胶仍然会在反复循环载荷下遭受疲劳断裂,其疲劳阈值通常低于100 1 m-2.在本工作中,我们报道了一种简单的策略,用于开发韧性和抗疲劳的各向异性水凝胶,其疲劳阈值超过常规水凝胶的100倍.各向异性水凝胶通过两步工艺合成,包括磁场定向工艺形成优先排列的PDA-Fe3O4-CF纤维结构,以及冷冻解冻-退火工艺处理.优先排列纤维结构和高结晶度的协同作用使各向异性水凝胶具有超高的强度和韧性、优异的摩擦学性能和非凡的抗疲劳性能.各向异性水凝胶的抗拉强度、抗压强度和疲劳阈值分别高达11.82±0.85 MPa、5.95±0.35 MPa和1845 J m-2,显著高于大多数生物凝胶和合成水凝胶.因此,本研究为制造性能优异的软材料提供了一种可行的方法,拓展了软...
|
|
|