Preparation, properties, and degradation mechanism of thermosensitive self-degradation microgel.
- Resource Type
- Article
- Authors
- Zheng, Cunchuan; Yan, Chaozong; Xie, Hu; Huang, Lamei; Fu, Haoran; Zhang, Tailiang; Huang, Zhiyu
- Source
- Journal of Dispersion Science & Technology. 2023, Vol. 44 Issue 7, p1216-1225. 10p. 5 Diagrams, 3 Charts, 5 Graphs.
- Subject
- *MALEIC anhydride
*ACRYLIC acid
*MICROGELS
*POLYMER solutions
*MOLECULAR weights
*ACRYLAMIDE
- Language
- ISSN
- 0193-2691
An azo-type thermosensitive crosslinking agent was prepared from azobisisobutyramidine hydrochloride (V-50) and maleic anhydride. It is then copolymerized with acrylamide (AM) and acrylic acid (AA) to prepare thermosensitive self-degradation microgel. The microgel particles are uniformly dispersed in the aqueous solution in the form of particles. Water absorption and swelling experiments of microgel showed that the water absorptivity of microgel decreased with the increase of salinity. And the microgel have the best water absorptivity under a neutral environment. The results of microgel degradation experiments showed that the higher the temperature, the shorter the degradation time, and the degradation is complete within 5 h at 100 °C. The solid residue measured by the degradation liquid is almost 0, indicating that the microgel can be thoroughly degraded at high temperature. The polymer solution after degradation can be measured by gel chromatograph and the average molecular weight is Mn=1.9 × 105g/mol. And the swelling and degradation mechanism were summarized. [ABSTRACT FROM AUTHOR]