日用化学工业（中英文）2025，Vol.55Issue(7)：817-824,8.DOI:10.3969/j.issn.2097-2806.2025.07.001
聚羟乙基丙烯酰胺体系的温度响应性相态转变
Temperature-induced phase transition in the system based on poly(hydroxyethyl acrylamide)
摘要
Abstract
Stimuli-responsive polymer gels have attracted significant attention owing to their controlled rheological properties resulted from sol-gel/gel-sol transition.Generally,the change of external conditions such as temperature and pH is usually essential to sol-gel/gel-sol transition.However,in some application scenarios,external conditions are not easy to change.Therefore,it is important to construct a gel system that can realize continuous sol-gel-sol phase transition under constant conditions.Herein,a novel polymer gel system(AGX)with the characteristic of continuous sol-gel-sol phase transition at constant temperature,was successfully constructed by using poly(hydroxyethyl acrylamide)(PHEAA)as the skeleton molecule,glyoxal(GX)as the crosslinking agent,and N,N-dimethylformamide(DMF)and water as the solvent.The effects of temperature,GX content,polymer content and water content on the gelation time,gel-breaking time and gel strength of AGX were investigated.The results showed that by changing the GX content and temperature,AGX could form a polymer gel with elastic modulus of 560 Pa within 7-2000 min and could turn to a low-viscosity liquid(<30 mPa·s)in just 2 h.The greater the concentration of GX or PHEAA,the faster the gelation and the slower the gel-breaking.With the increase of temperature,both the gelation and gel-breaking became faster.The introduction of electrolytes had little effect on the gelation time but could greatly reduce the gel-breaking time.The sol-gel transition was mainly ascribed to the aldol condensation between GX and PHEAA,while the gel-sol transition might be resulted from the breaking of amide bonds.关键词
聚羟乙基丙烯酰胺/乙二醛/缩醛反应/相态转变Key words
poly(hydroxyethyl acrylamide)/glyoxal/acetalation/phase transition分类
化学化工引用本文复制引用
李洋,穆蒙,束青林,李兴姚,唐绪涛,张永民..聚羟乙基丙烯酰胺体系的温度响应性相态转变[J].日用化学工业（中英文）,2025,55(7):817-824,8.基金项目
国家自然科学基金资助项目(22072058 （）
21503094) （）
中石化新领域培育项目(P24113) （P24113）
博士后项目(YKB2107) （YKB2107）
胜利油田创新项目(YKF2306) （YKF2306）
