微晶和氢键双增强水凝胶<strong>AG/PVA/CB[7]</strong>的制备和性能

doi:10.11901/1005.3093.2020.111

材料研究学报

2020, Vol. 34

Issue (9): 691-696 DOI: 10.11901/1005.3093.2020.111

研究论文

本期目录 | 过刊浏览

微晶和氢键双增强水凝胶AG/PVA/CB[7]的制备和性能

杨琴(

), 赵卫杰, 赵娜, 王若迪, 陈诚

西安建筑科技大学化学与化工学院西安 710055

Preparation and Properties of a Novel AG/PVA/CB[7] Hydrogel Reinforced by Microcrystalline and Hydrogen Bonds

YANG Qin(

), ZHAO Weijie, ZHAO Na, WANG Ruodi, CHEN Cheng

School of Chemistry and Chemical Engineering, Xi 'an University of Architecture and Technology, Xi 'an 710055, China

引用本文:

杨琴, 赵卫杰, 赵娜, 王若迪, 陈诚. 微晶和氢键双增强水凝胶AG/PVA/CB[7]的制备和性能[J]. 材料研究学报, 2020, 34(9): 691-696.
Qin YANG, Weijie ZHAO, Na ZHAO, Ruodi WANG, Cheng CHEN. Preparation and Properties of a Novel AG/PVA/CB[7] Hydrogel Reinforced by Microcrystalline and Hydrogen Bonds[J]. Chinese Journal of Materials Research, 2020, 34(9): 691-696.

全文: PDF(8098 KB) HTML

摘要:

以天然高分子琼脂糖(AG)为第一物理交联网络、聚乙烯醇(PVA)为第二物理交联网络、七元瓜环(CB[7])为交联剂，制备了双网络AG/PVA/CB[7]水凝胶。使用SEM、FT-IR和XRD等手段表征AG/PVA/CB[7]水凝胶的形貌、结构以及交联方式，研究了这种水凝胶的力学性能、溶胀性能和宏观自愈性能。结果表明：这种凝胶具有高强度和自愈性，高分子链之间通过氢键和微晶共同交联使其机械性能提高；该凝胶的力学性能随着冷冻-解冻次数的增加而提高，交联剂CB[7]的加入也使其力学性能提高，循环5次后其拉伸强度为0.37 MPa，杨氏模量为 0.23 MPa，平衡溶胀率为140%。

关键词 ：高分子材料, 自愈水凝胶, 结构表征, 生物相容性, 微晶交联

Abstract：

A novel dual-network hydrogel AG/PVA/CB[7] was prepared with natural polymer agarose (AG) as the first physical crosslinking network, polyvinyl alcohol (PVA) as the second physical crosslinking network, and cucurbituril[7] (CB[7]) as the crosslinking agent. The morphology, structure, crystallinity and crosslinking mode of the AG/PVA/CB[7] hydrogel were characterized by SEM, FT-IR and XRD. The mechanical properties, swelling properties and re-healing properties of the hydrogel were investigated. The results show that the hydrogel presents high strength and re-healing properties. The mechanical properties of the hydrogel may be enhanced by cross-linking the polymer chains with hydrogen bonds and microcrystals. The mechanical properties of the hydrogel were not only increased with the increase of freeze-thaw times but also improved by the addition of crosslinking agent CB[7]. After 5 freeze-thaw cycles, the hydrogel presents tensile strength of 0.37 MPa, young's modulus of 0.23 MPa and equilibrium swelling rate of 140%.

Key words： polymer materials self-healing hydrogel structural characterization biocompatibility microcrystalline crosslinking

收稿日期: 2020-04-13

ZTFLH:

TQ427.26

基金资助:陕西省自然科学基金(2019JM-541)

作者简介: 杨琴，女，1974年生，副教授，博士

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https://www.cjmr.org/CN/10.11901/1005.3093.2020.111 或 https://www.cjmr.org/CN/Y2020/V34/I9/691

图1 AG/PVA/CB[7]水凝胶的SEM照片

图2 PVA、AG/PVA和AG/PVA/CB[7]水凝胶的红外光谱图

图3 AG/PVA/CB[7]水凝胶的XRD谱

图4 AG/PVA/CB[7]水凝胶的结构示意图

图5 PVA、AG/PVA和AG/PVA/CB[7]水凝胶的应力-应变曲线

图6 不同冷冻-解冻次数AG/PVA/CB[7]水凝胶力的应力-应变曲线

表1 AG/PVA/CB[7]水凝胶的交联密度

图7 PVA/AG水凝胶的自愈合过程

图8 PVA/AG/CB[7]水凝胶自愈合过程

图9 温度对AG/PVA/CB[7]水凝胶溶胀性能的影响

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