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第 35 卷第 7 期                             精   细   化   工                                  Vol.35, No.7
             201 8 年 7 月                             FINE CHEMICALS                                 July  2018


              功能材料
                   温度和 pH 双重敏感性 P(DEA-co-DMAEMA) /


                                  Na WO 水凝胶的合成与表征
                                                4
                                       2

                                                   1
                                                                1*
                                                                             2*
                                          马建军 ,王   丰 ,徐世美
                 (1.  新疆大学  化学化工学院  石油天然气精细化工教育部自治区重点实验室,新疆  乌鲁木齐   830046;
                 2.  四川大学  化学学院,四川  成都  610065)

                 摘要:以 N,N-二乙基丙烯酰胺(DEA)和甲基丙烯酸二甲氨基乙酯(DMAEMA)为单体,N,N-亚甲基双丙烯
                 酰胺(BIS)为交联剂,采用一锅法制备了温度和 pH 双重响应性 P(DEA-co-DMAEMA)/Na 2 WO 4 水凝胶。考察
                 了 Na 2 WO 4 的引入对水凝胶的结构、温度和 pH 响应性能的影响。结果表明:复合水凝胶中除了化学交联外,还
                 存在 Na 2 WO 4 与聚合物间由于氢键和配位作用产生的物理交联;复合水凝胶的低临界相转变温度(LCST)随着
                 Na 2 WO 4 质量分数的增加呈线性降低,当 Na 2 WO 4 质量分数从 0 增至 3%时,LCST 由 41.6 ℃降至 34.4 ℃;复合
                 水凝胶表现出双重 pH 响应性,即在酸性条件下溶胀,中性条件下溶胀率减小,碱性条件下溶胀率又升高。
                 关键词:水凝胶;温敏性;pH 响应性;Na 2 WO 4 ;功能材料
                 中图分类号:O633      文献标识码:A     文章编号:1003-5214 (2018) 07-1116-05


                     Synthesis and Characterization of Temperature- and pH-sensitive

                                   P(DEA-co-DMAEMA)/Na 2WO 4 Hydrogels

                                                                               2*
                                                                 1*
                                                    1
                                         MA Jian-jun , WANG Feng , XU Shi-mei
                 (1. Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang Uyghur Autonomous Region,
                 College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, Xinjiang, China; 2. College of
                 Chemistry, Sichuan University, Chengdu 610065, Sichuan, China)

                 Abstract: A  series of temperature-  and pH-sensitive P(DEA-co-DMAEMA)/Na 2WO 4 hydrogels  were
                 synthesized by one pot method with N,N-diethylacrylamide (DEA) and dimethylaminoethyl methacrylate
                 (DMAEMA) as monomers,  N,N-methylene bisacrylamide (BIS) as crosslinking agent, respectively.  The
                 effect of Na 2WO 4 content on the structure, temperature and pH dual-responsive behavior of hydrogel was
                 investigated. The results showed that besides chemical cross-linking in composite hydrogel, there was a
                 physical cross-linking caused  by  hydrogen  bonding and coordination between  Na 2WO 4 and  polymer.
                 Furthermore, low critical solution temperature  (LCST)  of composite hydrogel  decreased linearly with
                 increasing of Na 2WO 4 content. When the Na 2WO 4 content increased from 0 to 3%, the LCST decreased
                 from 41.6 ℃ to 34.4 ℃. In addition, the composite hydrogel exhibit double pH-responsive properties, i.e.,
                 swelling  ratio  of composite hydrogel increased  under acidic condition, then it  decreased  under neutral
                 condition, but increased again under alkaline condition.
                 Key words: hydrogel; temperature sensitivity; pH sensitivity; Na 2WO 4; functional materials
                 Foundation item: National Natural Science Foundation of China (21366031)


                 智能水凝胶是一种能够对外界刺激做出响应的                          为的一类智能水凝胶,它在相转变温度〔包括低临
                                             [2]
                                                   [3]
                                       [1]
            水凝胶,典型的刺激包括温度 、pH 和光 等。温                           界相转变温度( LCST )和高临界相转变温度
            敏性水凝胶是指可以随外界温度改变而发生响应行                             (UCST)〕前后表现出截然不同的性质,如透明度

                 收稿日期:2017-06-05;  定用日期:2017-11-27; DOI: 10.13550/j.jxhg.20170471
                 基金项目:国家自然科学基金资助项目(21366031)
                 作者简介:马建军(1991—),男,硕士生。联系人:王   丰(1962—),女,教授,E-mail:wangfeng62@126.com;徐世美(1973―),
                 女,教授,E-mail: xushmei@gmail.com。
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