pH-Responsive polyethyleneimine hydrogel based on dynamic covalent bonds

编号 020038401

推送时间 20230227

研究领域 林产化工 

年份 2022 

类型 期刊 

语种 英语

标题 pH-Responsive polyethyleneimine hydrogel based on dynamic covalent bonds

来源期刊 Journal of Polymer Research

期 第384期

发表时间 20230203

关键词 Dynamic covalent bonds;  Smart hydrogels;  pH-responsive;  Temporary plugging agents; 

摘要 Smart hydrogels with excellent stimulus-responsiveness can be applied to a variety of fields. Herein, a new smart hydrogel with pH-responsive, reversible gel-fluid transition properties and self-healing ability was prepared by using the reaction of the primary amino group of the polyethyleneimine structural unit with the benzaldehyde group of the modified polyethylene glycol to obtain dynamic imine bonds. Different concentrations of cross-linking agents were added and their effects on the structure, morphology, mechanical properties, and self-healing ability of the hydrogels were evaluated. The prepared hydrogels showed good pH responsiveness and some self-healing properties. In addition, the hydrogels were stable in water at 9000 mg L- 1 salinity compared to that in ultrapure water, and they could be broken rapidly within 1 h at pH = 4. This study provides a new idea to realize the intelligent regulation of temporary plugging agent blocking/unblocking.

服务人员 尚玮姣

服务院士 宋湛谦

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