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日用化学工业（中英文）

日用化学工业（中英文） ›› 2025, Vol. 55 ›› Issue (7): 817-824.doi: 10.3969/j.issn.2097-2806.2025.07.001

• 特邀专稿 •    下一篇

聚羟乙基丙烯酰胺体系的温度响应性相态转变

李洋1,穆蒙2,3,*(),束青林4,李兴姚1,唐绪涛1,张永民1,*()   

  1. 1.江南大学 化工与材料工程学院，江苏 无锡 214122
    2.中石化胜利油田博士后工作站，山东 东营 257100
    3.中石化胜利油田石油工程技术研究院，山东 东营 257100
    4.中石化胜利油田，山东 东营 257100
  • 收稿日期:2024-08-12 出版日期:2025-07-22 发布日期:2025-07-23
  • 基金资助:
    国家自然科学基金资助项目(22072058);国家自然科学基金资助项目(21503094);中石化新领域培育项目(P24113);博士后项目(YKB2107);胜利油田创新项目(YKF2306)

Temperature-induced phase transition in the system based on poly (hydroxyethyl acrylamide)

Yang Li1,Meng Mu2,3,*(),Qinglin Shu4,Xingyao Li1,Xutao Tang1,Yongmin Zhang1,*()   

  1. 1. School of Chemical & Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
    2. Postdoctoral Scientific Research Working Station of Shengli Oilfield, SINOPEC, Dongying, Shandong 257100, China
    3. Petroleum Engineering Technology Research Institute of Shengli Oilfield, SINOPEC, Dongying, Shandong 257100, China
    4. Shengli Oilfield, SINOPEC, Dongying, Shandong 257100, China
  • Received:2024-08-12 Online:2025-07-22 Published:2025-07-23
  • Contact: *E-mail: mumeng_cas@163.com;zhangym@jiangnan.edu.cn

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摘要： 聚合物凝胶的溶液-凝胶-溶液（sol-gel-sol）相态转变往往需要外界条件（温度、pH等）的变化来实现，但是，在一些特殊的应用情景下，环境条件不易改变。因此，构建能够在恒定条件下实现sol-gel-sol连续相态转变的凝胶体系是必要的。本文以聚羟乙基丙烯酰胺（PHEAA）为骨架分子，乙二醛（GX）为交联剂，N,N-二甲基甲酰胺（DMF）和水为溶剂，成功构建了可以在恒温条件下发生sol-gel-sol连续相态转变的AGX体系。系统考察了温度、GX含量、聚合物含量、水含量等因素对AGX的成胶时间、破胶时间及凝胶强度的影响。结果表明：通过改变GX含量和温度，AGX可在7~2 000 min内形成弹性模量达560 Pa的聚合物凝胶，且最快可在2 h后降解为低黏液体（<30 mPa·s）。GX或PHEAA浓度越大，成胶越快，破胶越慢；温度升高，成胶和破胶均变快；电解质的引入对成胶时间的影响较小，但可以大幅降低破胶时间。sol-gel转变主要归因于GX与PHEAA之间的羟醛缩合，而gel-sol转变可能归因于酰胺键的断裂。

关键词: 聚羟乙基丙烯酰胺, 乙二醛, 缩醛反应, 相态转变

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 7-2 000 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.

Key words: poly（hydroxyethyl acrylamide）, glyoxal, acetalation, phase transition

中图分类号: 

  • TQ427