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| 疏水缔合水凝胶的性能及链缠结 |
| Performance and chain entanglement of hydrophobic association hydrogels |
| 投稿时间：2018-11-15 修订日期：2018-12-05 |
| DOI： |
| 中文关键词: 水凝胶 疏水缔合 力学强度 溶胀过冲 链缠结 缠结分子量 |
| 英文关键词: hydrogel hydrophobic association mechanical strength swelling overshoot chain entanglement entangled molecular weight |
| 基金项目:国家自然科学基金资助项目(21174053,U1301241) |
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| 中文摘要: |
| 为研究凝胶体系的分子链缠结,通过胶束共聚合成不同单体含量组成的疏水缔合水凝胶(HA-gels)。通过拉伸实验及溶胀实验分别测试HA-gels的力学性能及溶胀性能。通过力学及溶胀性能参数计算分子链缠结相关参数,进而利用MATLAB软件通过迭代法计算缠结分子量。结果表明,HA-gels的力学强度与模量均随单体含量增加而增加,断裂伸长率相应下降。HA-gels的溶胀率随单体含量的增加而降低,所有的HA-gels均呈现溶胀过冲现象。将HA-gels干燥后,干凝胶的溶胀率随单体含量增加而下降并出现溶胀过冲现象。HA-gels在水中的质量损失随单体含量的增加而降低。适用于任意单体含量的HA-gels及干凝胶的缠结分子量为Men= 15606 Φ2-0.853。 |
| 英文摘要: |
| In order to study the molecular chain entanglement of hydrogel system, hydrophobic association hydrogels (HA-gels) with different contents of monomers are synthesized by micellar copolymerization. The molecular chain entanglement parameters are calculated by the mechanical and swelling property parameters, and then the entanglement molecular weight is calculated by an iterative method using the MATLAB software. The results show that the mechanical strength and modulus increases and the elongation at break of HA-gels decreases with an increase on the content of monomers. The swelling ratio of HA-gels decreases with an increase on the amount of monomers. All HA-gels present a swelling overshoot appearance. After hydrogels are dried, the swelling ratio of the xerogels decreases with the increase of monomer content and the swelling overshoot phenomenon can also occurs. The mass loss of hydrogels in water decreases with an increase of monomer content. The entanglement molecular weight of HA-gels and xerogels for any monomer content is Men= 15606 Φ2-0.853. |
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