双网络<strong>Au NCs/HA/PVA</strong>复合水凝胶的荧光示踪性能和力学性能

doi:10.11901/1005.3093.2020.500

材料研究学报

2022, Vol. 36

Issue (2): 107-113 DOI: 10.11901/1005.3093.2020.500

研究论文

本期目录 | 过刊浏览

双网络Au NCs/HA/PVA复合水凝胶的荧光示踪性能和力学性能

廖静文, 饶春兴, 王艳芹(

), 陈维毅

太原理工大学生物医学工程学院太原 030024

Fluorescent Tracing Abilities and Mechanical Properties of Au NCs/HA/PVA Composite Hydrogel

LIAO Jingwen, RAO Chunxing, WANG Yanqin(

), CHEN Weiyi

College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, China

引用本文:

廖静文, 饶春兴, 王艳芹, 陈维毅. 双网络Au NCs/HA/PVA复合水凝胶的荧光示踪性能和力学性能[J]. 材料研究学报, 2022, 36(2): 107-113.
Jingwen LIAO, Chunxing RAO, Yanqin WANG, Weiyi CHEN. Fluorescent Tracing Abilities and Mechanical Properties of Au NCs/HA/PVA Composite Hydrogel[J]. Chinese Journal of Materials Research, 2022, 36(2): 107-113.

全文: PDF(4129 KB) HTML

摘要:

以聚乙烯醇(PVA)为原料、金纳米簇(Au NCs)和纳米羟基磷灰石(HA)为掺杂物、戊二醛作为交联剂，用化学交联法和循环冷冻-解冻法制备双网络Au NCs/HA/PVA复合水凝胶并检测其荧光特性、力学性能和溶胀率，研究了Au NCs含量和冷冻-解冻循环次数对其性能的影响。结果表明：这种凝胶具有较好的荧光特性；Au NCs与PVA的质量比为2.6%和冷冻-解冻循环次数为9次时，这种凝胶的力学性能最优并具有显著的荧光性能，其拉伸弹性模量、断裂强度以及断裂能分别达到63.09 kPa、152.84 kPa和130.36 kJ·m^-3，含水率约为80%，与人体软骨组织的含水率相近。

关键词 ：复合材料, 双网络水凝胶, 力学表征, 金纳米簇, 荧光示踪

Abstract：

Composite hydrogel of Au NCs/HA/PVA with double network was prepared by means of chemical crosslinking and cyclic freezing-thawing with polyvinyl alcohol (PVA) as raw material, gold nanocluster (Au NCs) and hydroxyapatite (HA) as dopants, and glutaraldehyde as crosslinking agent. The effect of Au NCs content and the number of freezing-thawing cyclics on the physical properties of Au NCs/HA/PVA composite hydrogels was investigated. The results show that the mechanical strength of the gels increased with the increasing number of the freezing-thawing cycles. When the Au NCs content is 2.6% and the number of the freezing-thawing cyclic is 9, the gel has the optimized mechanical properties. The elastic modulus, breaking strength and fracture energy of the gel are 63.09 kPa, 152.84 kPa and 130.36 kJ·m^-3, respectively. The moisture content is about 80%, which is similar to the human cartilage tissue, and shows remarkable fluorescence properties.

Key words： composite double networks hydrogels mechanical characterization gold nanoclusters fluorescence tracing

收稿日期: 2020-11-23

ZTFLH:

R318.08

基金资助:国家自然科学基金(12172243);山西省自然科学基金(2021-0302123158)

作者简介: 廖静文，女，1997年生，硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2020.500 或 https://www.cjmr.org/CN/Y2022/V36/I2/107

图1 Au NCs/HA/PVA水凝胶的结构示意图

图2 Au NCs的TEM照片

图3 Au NCs的荧光光谱图

图4 在自然光和紫外光照射下不同Au NCs含量的Au NCs/HA/PVA复合水凝胶的照片

图5 不同Au NCs含量的Au NCs/HA/PVA复合水凝胶的断裂能

图6 不同Au NCs含量的Au NCs/HA/PVA复合水凝胶的断裂应变

图7 不同Au NCs含量的Au NCs/HA/PVA复合水凝胶拉伸时的弹性模量

图8 不同Au NCs含量的Au NCs/HA/PVA复合水凝胶压缩时的弹性模量

图9 Au NCs5.3/HA/PVA水凝胶的SEM照片

图10 不同次数冷冻-解冻循环的Au NCs/HA/PVA复合水凝胶的断裂能

图11 不同次数冷冻-解冻循环的Au NCs/HA/PVA复合水凝胶的断裂应变

图12 经过不同次数冷冻-解冻循环的Au NCs/HA/PVA复合水凝胶拉伸时的弹性模量

图13 经过不同次数冷冻-解冻循环的Au NCs/HA/PVA复合水凝胶压缩时的弹性模量

图14 不同Au NCs含量的Au NCs/HA/PVA复合水凝胶的溶胀比率与时间的关系

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