期刊
BIOMACROMOLECULES
卷 20, 期 12, 页码 4476-4484出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.biomac.9b01223
关键词
-
资金
- Northeastern University
- Qufu Normal University
- South University of Technology
- National Natural Science Foundation of China [21808126]
Hydrogels are attracting increasing attention due to their potential use in various fields. However, most of the existing hydrogels have limitations in either dissipating mechanical energy or maintaining high stretchability under deformation, thus do not possess high mechanical properties. Herein, poly(vinyl alcohol) (PVA)-tannic acid (TA) hydrogels with both high mechanical strength and stretchability were obtained via a step-by-step physical cross-linking and molecular alignment method. Saline-triggered physical interactions serve as sacrifice domains to dissipate energy and endow PVA-based hydrogel with high mechanical strength (approximate to 116 MPa) and stretchability (approximate to 1000%). Due to the reversible arranging and disassociating property of physical interactions, PVA-TA hydrogels show excellent shape memory performance. We further demonstrated an effective approach to fabricate strong and aligned PVA-TA thread. The resultant well-aligned PVA-TA dry thread reveals an ultrahigh mechanical tensile strength of up to 750 MPa, nearly 4S times higher than PVA-TA thread with no alignment. Wide-angle X-ray two-dimensional diffraction images further confirmed the alignment of PVA fibers in stretching direction. In addition, we applied the PVA TA hydrogel as suture and evaluated the cytotoxicity and biocompatibility of the PVA-TA suture.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据