[1]程勇博,王 启,王 磊,等.高强度和自修复PAA-co-PAM/Gelatin双物理网络水凝胶的制备及性能研究[J].西安工业大学学报,2020,(01):9-17.[doi:10.16185/j.jxatu.edu.cn.2020.01.002 ]
 CHENG Yongbo,WANG Qi,WANG Lei,et al.Preparation and Performance Study of PAA-co-PAM/Gelatin Dual-Physical Network Hydrogels with High Strength and Self-Repairing Properties[J].Journal of Xi'an Technological University,2020,(01):9-17.[doi:10.16185/j.jxatu.edu.cn.2020.01.002 ]
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高强度和自修复PAA-co-PAM/Gelatin双物理网络水凝胶的制备及性能研究()
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《西安工业大学学报》[ISSN:1673-9965/CN:61-1458/N]

卷:
期数:
2020年01期
页码:
9-17
栏目:
基础科学
出版日期:
2020-02-15

文章信息/Info

Title:
Preparation and Performance Study of PAA-co-PAM/Gelatin Dual-Physical Network Hydrogels with High Strength and Self-Repairing Properties
文章编号:
1673-9965(2020)01-0009-09
作者:
程勇博王 启王 磊马爱洁
(西安工业大学 材料与化工学院,西安 710021
Author(s):
CHENG YongboWANG QiWANG LeiMA Aijie
(School of Materials and Chemical Engineering,Xi'an Technological University,Xi'an 710021,China)
关键词:
双网络水凝胶 自修复 物理交联 氢键
Keywords:
dual network hydrogel selfhealing physical crosslinking hydrogen bond
分类号:
TQ318
DOI:
10.16185/j.jxatu.edu.cn.2020.01.002
文献标志码:
A
摘要:
针对传统的双网络(DN)水凝胶由于缺乏有效的动态交联机制,从而很难同时实现高强度和自愈合性能的问题。文中设计制备了具有双物理网络的水凝胶聚丙烯酸-co-丙烯酰胺/明胶(PAA-co-PAM/Gelatin),在所制备的凝胶中,聚丙烯酸-co-丙烯酰胺分子链以氢键交联作为第一网络,明胶通过分子链螺旋化交联作为第二网络。分别考察了不同丙烯酸-丙烯酰胺浓度及明胶含量对DN凝胶的力学性能和自修复性能的影响。实验结果表明:当丙烯酸-丙烯酰胺总浓度为5 mol·L-1,明胶的质量分数为30%时,制备的水凝胶性能最佳,其弹性模量可达361.8 kPa,断裂强度和断裂伸长率分别为605.3 kPa和835%,冲击强度和耗散能分别为4.26 MJ·m-3和806.5 kJ·m-3,自修复效率大于70%。所制备的PAA-co-PAM/Gelatin凝胶兼具良好的力学强度和自愈合性能,能够在4 h内快速修复表面划痕。
Abstract:
It is difficult for the traditional dual-network(DN)hydrogel to have both high strength and self-healing properties due to the lack of an effective dynamic cross-linking mechanism.The polyacrylic acid-co-polyacrylamide/gelatin(PAA-co-PAM/Gelatin)hydrogel with dual physical networks were prepared.In the prepared hydrogel, the PAA-co-PAM molecular chain was cross-linked by the hydrogen bond as the first cross-linking network,and gelatin was cross-linked by the molecular chain triple helixes as the second network. The effects of different polymer monomer concentrations and gelatin content on the mechanical properties and self-healing properties of DN hydrogels were investigated.Experimental results show that when the concentration of the copolymer monomer was 5 mol·L-1 and the gelatin mass fraction was 30%,the prepared hydrogel performed the best. Its elastic modulus reached 361.8 kPa,its breaking strength and the breaking elongation were 605.3 kPa and 835%,respectively, and its impact strength and dissipation energy were 4.26 MJ·m-3 and 806.5 kJ·m-3,respectively,with its self-healing efficiency greater than 70%.It is concluded that the prepared PAA-co-PAM/Gelatin gel has good mechanical strength and self-healing property,and the surface cracks and scratches can be repaired within 4 hours.

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相似文献/References:

[1]程勇博,马爱洁,徐 佳,等.PAA/GO/Fe3+水凝胶的制备及自修复性能研究[J].西安工业大学学报,2019,(04):382.
 CHENG Yongbo,MA Aijie,XU Jia,et al.Preparation and Self-Healing Performance of PAA/GO/Fe3+ Hydrogels[J].Journal of Xi'an Technological University,2019,(01):382.

备注/Memo

备注/Memo:
收稿日期:2019-11-28
基金资助:陕西省教育厅自然科学专项项目(17JK0380); 西安工业大学2019年省级大创项目(S201910702081)。 第一
作者简介:程勇博(1993-),男,西安工业大学硕士研究生。 通信作者简介:马爱洁(1980-),女,西安工业大学副教授,主要研究方向为功能高分子材料,E-mail:maaijie@xatu.edu.cn。
(编辑、校对 潘秋岑)
更新日期/Last Update: 2020-02-15