Page 103 - 《精细化工》2020年第8期

第 37 卷第 8 期 精 细 化 工 Vol.37, No.8
202 0 年 8 月 FINE CHEMICALS Aug. 2020

功能材料
PASP/PAA 互穿网络水凝胶的制备

及其作为保水剂的应用

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赵俭波 1,2 ，罗 楠 ，曹 辉
（1. 北京化工大学 北京市生物加工过程重点实验室，北京 100029；2. 塔里木大学 新疆生产建设兵团
南疆化工资源利用工程实验室，新疆 阿拉尔 843300）

摘要：采用水相法制备了聚天冬氨酸-聚丙烯酸互穿网络（PASP/PAA IPN）水凝胶，通过正交实验优化其制备工
艺。利用 FTIR、SEM、TGA 和 DSC 对 PASP/PAA IPN 水凝胶的结构及性能进行表征，考察了 PASP/PAA IPN
水凝胶在不同温度及 pH 条件下的吸水率，最后作为保水剂进行芹菜盆栽实验。结果表明，互穿网络组成对水
凝胶的稳定性和吸水性具有明显的影响，最终工艺条件为聚琥珀酰亚胺 3 g、丙烯酸 2 mL、交联剂乙二醇二缩
水甘油醚 1 g、交联剂 N, N′-亚甲基双丙烯酰胺 16 mg，在该条件下得到 PASP/PAA IPN 水凝胶吸液倍率为 266 g/g，
吸盐水倍率为 63 g/g，具有良好的热性能、pH 敏感性和温度敏感性。盆栽实验证明，PASP/PAA IPN 水凝胶无
论正常浇水还是干旱胁迫下，芹菜生长情况、光合速率及叶绿素含量均优于市售 PAA 保水剂，对应的光合速率
较 PAA 保水剂分别高 7.82%和 53.40%；叶绿素含量较 PAA 保水剂分别高 58.33%和 249.70%。
关键词：聚天冬氨酸；聚丙烯酸；互穿网络；保水剂；功能材料
中图分类号：TQ427.26 文献标识码：A 文章编号：1003-5214 (2020) 08-1601-08

Preparation of PASP/PAA interpenetrate network hydrogel and

its application in water retaining agent

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1,2
ZHAO Jianbo , LUO Nan , CAO Hui
（1. Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology, Beijing 100029, China;
2. Engineering Laboratory of Chemical Resources Utilization in South Xinjiang of Xinjiang Production and
Construction Corps, Tarim University, Alar 843300, Xinjiang, China）
Abstract: Poly(aspartic acid)-poly(acrylic acid) (PASP/PAA IPN) interpenetrating network hydrogel was
prepared by aqueous phase method and its preparation process was optimized by orthogonal experiment.
The structure and properties of PASP/PAA interpenetrating network hydrogel were characterized by FTIR,
SEM, TGA and DSC. The water absorption at different temperatures and pH values was investigated.
Finally, the prepared hydrogel was used as water retaining agent for pot experiment of celery. The results
showed that the composition of the interpenetrating network had a significant effect on the stability and
water absorption of hydrogel. The final process conditions were selected as follows: polysuccinimide 3 g,
acrylic acid 2 mL, crosslinker ethylenediamine diglycidyl ether 1 g and N, N′- methylene bisacrylamide
16 mg. Under these conditions, the prepared PASP/PAA interpenetrating network hydrogel exhibited good
thermal properties, pH sensitivity and temperature sensitivity, and the water absorption were 266 g/g in
distilled water and 63 g/g in saline. The pot experiment revealed that the growth, photosynthetic rate, and
chlorophyll content of celery used PASP/PAA interpenetrating network hydrogel as water retaining agent
were better than those used commercially available PAA water retaining agent whether under normal

收稿日期：2020-01-09; 定用日期：2020-05-09; DOI: 10.13550/j.jxhg.20200023
基金项目：国家自然科学基金项目（21865026）；北京化工大学化工资源有效利用国家重点实验室开放课题（CRE-2017-C-301）；新疆
生产建设兵团项目（2018BC005）
作者简介：赵俭波（1982—），男，副教授，博士生，E-mail：lain_1982@163.com。联系人：曹 辉（1977—），男，博士，副教授，
E-mail：caohui@mail.buct.edu.cn。