Page 74 - 《精细化工》2023年第8期

第 40 卷第 8 期 精 细 化 工 Vol.40, No.8
20 23 年 8 月 FINE CHEMICALS Aug. 2023

功能材料
基于四重氢键的自修复温敏相变凝胶的制备及性能

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陈小菁 ，丘晓琳 1,2* ，范晓月 ，刘华萱
（1. 江南大学 机械工程学院，江苏 无锡 214122；2. 江苏省食品先进制造装备技术重点实验室，江苏 无
锡 214122）

摘要：为提高定型相变材料（SSPCM）的使用寿命，以水和离子液体（IL）为相变材料（PCM），N-异丙基丙
烯酰胺（NIPAM）为单体，壳寡糖（COS）为添加剂，引入 2-脲基-4[1H]-嘧啶酮（UPy）形成四重氢键二聚体，
采用自由基聚合法制备了自修复温敏型相变凝胶（S-EBIL）。通过 FTIR、SEM、TEM 对相变凝胶的化学结构与
微观形貌进行了表征，并测定了相变凝胶的自修复性、溶胀性和热性能。结果表明，相变凝胶具有多孔结构，内
部孔径为 18~38 μm，微凝胶核壳尺寸 2~4 μm。相变凝胶具有温度敏感性，当温度升高时，相变凝胶黏弹性增大，
不仅能维持相变材料的基本形状，而且能防止相变材料泄漏。相变凝胶相变温度为–10~0 ℃，相变焓值最高
为 252.9 J/g，导热系数为 0.5207 W/(m·K)。自修复温敏相变凝胶（S-EBIL3，IL 与 H 2 O 质量比为 3∶10）修复效
率可达 95.5%（30 s）。
关键词：自修复凝胶；四重氢键；定型相变材料；离子液体；功能材料
中图分类号：TB34 文献标识码：A 文章编号：1003-5214 (2023) 08-1688-09

Preparation and properties of temperature-sensitive phase change
hydrogels based on quadruple hydrogen bond self-healing

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CHEN Xiaojing , QIU Xiaolin 1,2* , FAN Xiaoyue , LIU Huaxuan
（1. College of Mechanical Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China; 2. Jiangsu Key Laboratory
of Advanced Food Manufacturing Equipment and Technology, Wuxi 214122, Jiangsu, China）
Abstract: In order to improve the service life of shape-stabilized phase change material (SSPCM), self-healing
temperature-sensitive phase change hydrogels (S-EBIL) were prepared from free radical polymerization
method using water and ionic liquid (IL) as phase change material (PCM), N-isopropylacrylamide as
monomer, chitosan (COS) as additive, and 2-ureido-4[1H]-pyrimidinone (UPy) to form a quadruple
hydrogen bonds dimer. The chemical structure and micromorphology of the phase change hydrogels were
analyzed by FTIR, SEM and TEM, followed by investigation on the self-healing, swelling and thermal
properties. The results showed that the phase change hydrogels displayed a porous structure with internal
pore size of 18~38 μm and microgel core-shell size of 2~4 μm. Meanwhile, the phase change hydrogels
exhibited temperature sensitivity. As the temperature increased, the hydrogel showed enhanced viscoelasticity,
which maintained the basic shape and prevented the leakage of PCM. The phase change hydrogels
displayed a phase change temperature ranging from –10 ℃ to 0 ℃, phase change enthalpy and thermal
conductivity up to 252.9 J/g and 0.5207 W/(m‧K), respectively, and a self-healing efficiency up to 95.5%
within 30 s.
Key words: self-healing hydrogels; quadruple hydrogen bonds; shape-stabilized phase change materials;
ionic liquids; functional materials

收稿日期：2022-11-25; 定用日期：2023-01-28; DOI: 10.13550/j.jxhg.20221083
基金项目：国家自然科学基金项目（51503084）；中国博士后科学基金项目（2016M601713）；江苏省博士后科学基金项目（1601068C）
作者简介：陈小菁（1997—），女，硕士生，E-mail：xiaojingchenwm@126.com。联系人：丘晓琳（1979—），女，副教授，E-mail：
xiaolinqiu2005@126.com。