Radiation synthesis and characterization of thermo-sensitive PNIPA/clay hydrogels

SONG Hongyan; HE Suqin; LIU Wentao; YANG Mingcheng; ZHU Chengshen

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Radiation synthesis and characterization of thermo-sensitive PNIPA/clay hydrogels

更新时间：2023-03-30

- Radiation synthesis and characterization of thermo-sensitive PNIPA/clay hydrogels
- Journal of Radiation Research and Radiation Processing Vol. 25, Issue 4, Pages: 216-220(2007)
- 作者机构：
  
  1.郑州大学材料科学与工程学院　郑州　450052
  2.河南省科学院同位素研究所　郑州　450015
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SONG Hongyan, HE Suqin, LIU Wentao, et al. Radiation synthesis and characterization of thermo-sensitive PNIPA/clay hydrogels. [J]. Journal of Radiation Research and Radiation Processing 25(4):216-220(2007)
DOI：

SONG Hongyan, HE Suqin, LIU Wentao, et al. Radiation synthesis and characterization of thermo-sensitive PNIPA/clay hydrogels. [J]. Journal of Radiation Research and Radiation Processing 25(4):216-220(2007) DOI：

摘要

本工作以N-异丙基丙烯酰胺（NIPA）为聚合单体，采用辐射法合成了PNIPA/膨润土复合水凝胶材料，研究了钠基膨润土与有机改性膨润土种类、膨润土的含量以及分散条件对水凝胶溶胀性能的影响。溶胀性能测试结果表明，加入膨润土的复合水凝胶其溶胀性能优于均聚PNIPA，加入有机膨润土的复合凝胶平衡溶胀率（SR）最好，且表现较好的温度响应性和快速的相转变特性；随着有机膨润土含量的增加，复合水凝胶的SR和温度响应性均逐渐升高，当膨润土含量为10%时，水凝胶的溶胀性能最优。退溶胀实验结果表明，PNIPA/有机膨润土水凝胶失水最快，在0.5h内，其失水率为83%，PNIPA/钠基膨润土水凝胶失水74%，而PNIPA水凝胶失水则只有50%左右。压缩性能测试结果表明，加入膨润土后，水凝胶的压缩强度、最大压缩力等均有了不同程度的增大，随着土含量的增加，凝胶的压缩性能呈上升趋势，当有机改性土含量为15%时，其压缩强度为均聚PNIPA的2.5倍，压缩屈服力由原来的0.38N增加到5.28N，提高了约14倍。

Abstract

In this work, the thermo-sensitive hydrogels of P NIPA/Clay were synthesized by ,60,Co-γ rays irradiation. The effects of organically modified clay and Na,+, clay, clay content, and dispersing condition on swelling behavior of PNIPA/clay hydrogels were investigated. The results showed that the equilibrium swelling ratio (SR) of the PNIPA/clay hydrogels is better than PNIPA, and the SR of PNIPA/ organically modified clay hydrogels is the highest. With clay content increases, the SR of hydrogels became better. The deswelling behavior of hydrogel was improved, the deswelling ratio of the hydrogel with organically modified clay is highest, and ratio of losing water is 83%, while PNIPA is about 50%. The compressive properties of hydrogel composites were also examined. The results showed that the compressive properties of the PNIPA/clay hydrogels were improved distinctly than that of the conventional hydrogels without clay. And with increasing of clay content, the compressive properties of hydrogel composites improve rapidly. When the content of clay is 15%, the maximum compression force of the PNIPA/clay hydrogel is 5.28N, which is 14 times of PNIPA hydrogel and compression strength is 2.5 times.

关键词

辐射PNIPA膨润土溶胀性能压缩性能

Keywords

RadiationPNIPAClaySwelling behaviorCompressive properties

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