[1]赵彩霞,柏祥,邹国享,等.醇解度对聚乙烯醇水凝胶的形成及性能影响[J].常州大学学报(自然科学版),2017,(03):1-5.[doi:10.3969/j.issn.2095-0411.2017.03.001]
　ZHAO Caixia,BAI Xiang,ZOU Guoxiang,et al.The Effect of Alcoholysis Degree on Formation Process and Properties of PVA Hydrogels[J].Journal of Changzhou University(Natural Science Edition),2017,(03):1-5.[doi:10.3969/j.issn.2095-0411.2017.03.001]
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醇解度对聚乙烯醇水凝胶的形成及性能影响()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
期数:
2017年03期
页码:
1-5
栏目:
材料科学与工程
出版日期:
2017-05-28

文章信息/Info

Title:
The Effect of Alcoholysis Degree on Formation Process and Properties of PVA Hydrogels
作者:
赵彩霞; 柏祥; 邹国享; 李锦春
常州大学 材料科学与工程学院,江苏 常州 213164
Author(s):
ZHAO Caixia;  BAI Xiang;  ZOU Guoxiang;  LI Jinchun
School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China
关键词:
聚乙烯醇;  醇解度;  水凝胶;  时间依赖性;  温度敏感性
Keywords:
polyvinyl alcohol;  alcoholysis degree;  hydrogel;  time-dependence;  temperature sensibility
分类号:
O 631.1
DOI:
10.3969/j.issn.2095-0411.2017.03.001
文献标志码:
A
摘要:
将相同聚合度、不同醇解度的聚乙烯醇(PVA)以水作为介质制备PVA水溶液。采用旋转流变仪测试了PVA水溶液的黏度与静置时间的关系,研究PVA水溶液形成水凝胶的过程; 并对所形成水凝胶的温度敏感性和动态流变性能进行了研究。结果表明,PVA1788水溶液的黏度不具有时间依赖性,在静置过程中不形成凝胶; PVA1795和PVA1799水溶液为非牛顿流体,且体系的黏度随着静置时间的延长逐渐增大,即形成凝胶,表现出时间依赖性; 形成的PVA1795和PVA1799凝胶体系具有温度敏感性,在30 ℃左右胶体结构破坏; PVA1795水凝胶在低频区呈现出以弹性为主的固态特性,在高频区呈现出以黏性为主的液态特性,PVA1799在0.01～100 rad·s-1频率内呈现出由固态转变为凝胶态。
Abstract:
PVA with the same degree of polymerization and different alcoholysis degree was dissolved in water to obtain a solution. The relationship between viscosity and standing time of PVA solution was investigated by a rotational rheometer in order to research the form hydrogel process from aqueous PVA solution. Temperature sensibility of hydrogel and dynamic rheological properties also were studied. The results showed that the viscosity of the PVA1788 aqueous solution was not dependent upon standing time, indicating there was no gel formed. The viscosity of PVA1795 and PVA1799 aqueous as non-Newtonian fluids increased with standing time increase gradually, indicating the aqueous form hydrogel, which means the solution is of time-dependence. PVA1795 and PVA1799 hydrogels were of a temperature sensibility and gel structural damaged at about 30 ℃. PVA1795 hydrogel presented mainly solid elastic characteristics in the low frequency region, and viscous liquid-based features in the high frequency region. Solid-state properties of PVA1799 hydrogel changed into gel-state at the range of 0.01-100 rad·s-1.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2016-11-10。
基金项目:常州大学科技项目(ZMF10020003)。
作者简介:赵彩霞(1980—),女,湖北天门人,博士,讲师,主要从事水性高分子材料的研究。
更新日期/Last Update: 2017-06-05