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第 37 卷第 2 期                             精   细   化   工                                  Vol.37, No.2
             202 0 年 2 月                             FINE CHEMICALS                                 Feb.    2020


              功能材料
                                γ-FeOOH-g-PDMAEMA 稳定的


                                   Pickering 乳液及其响应性能



                                                       1
                                           1
                                  王   肖 ,张康民 ,吴明元                   1,2 ,吴庆云      1,2 ,
                                        杨建军      1,2 ,刘久逸      1,2 ,张建安      1,2,3*
                 (1.  安徽大学  化学化工学院,安徽  合肥    230601;2.  绿色高分子材料安徽省重点实验室,安徽  合肥
                 230601;3.  安徽大学物质科学与信息技术研究院,安徽  合肥    230601)

                 摘要:以 FeSO 4 •7H 2 O 为原料,2-溴代异丁酸为表面改性剂,加入乙二胺调节 pH=9,得到表面含引发剂的 γ-FeOOH
                 纳米粒子(γ-FeOOH-Br);采用表面引发的原子转移自由基聚合法(SI-ATRP),在 γ-FeOOH-Br 纳米粒子上
                 接枝具有双重响应型的聚甲基丙烯酸 N,N-二甲基氨基乙酯(PDMAEMA),得到 γ-FeOOH-g-PDMAEMA 纳米
                 粒子刷;以其为 Pickering 乳化剂,制备了双重响应型的 Pickering 乳液。通过 SEM、TEM、FT-IR、TGA、Zeta
                 电位及粒径对产物进行了表征;考察了粒子刷稳定的 Pickering 乳液的稳定性、pH 和温度响应性能。结果表明:
                 γ-FeOOH-Br 及 γ-FeOOH-g-PDMAEMA 均为针状,γ-FeOOH-Br 长 700  nm、宽 50  nm,γ-FeOOH-g-PDMAEMA
                 的长宽分别增加到 710 和 80  nm。γ-FeOOH-g-PDMAEMA 乳化剂的低临界溶解温度(LCST)为 35  ℃,制备
                 的 Pickering 乳液稳定性好,具有可逆的 pH 及温度双重响应行为。
                 关键词:PDMAEMA;ATRP;γ-FeOOH;Pickering 乳液;响应性;功能材料
                 中图分类号:TQ423.92      文献标识码:A      文章编号:1003-5214 (2020) 02-0242-07



                     Preparation and responsive properties of γ-FeOOH-g-PDMAEMA
                                           stabilized Pickering emulsion


                                          1
                                                                         1,2
                                                          1
                                                                                       1,2
                                Wang Xiao , Zhang Kangmin , Wu Mingyuan , Wu Qingyun ,
                                                              1,2
                                                    1,2
                                        Yang Jianjun , Liu Jiuyi , Zhang Jian′an 1,2,3*
                 (1. School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, Anhui, China; 2. Anhui Province
                 Key Laboratory of Environment-friendly Polymer Materials, Hefei  230601, Anhui,  China;  3.  Institute of Physical
                 Science and Information Technology, Anhui University, Hefei 230601, Anhui, China)
                 Abstract:  Initiator  immobilized  γ-FeOOH  nanoparticles  (γ-FeOOH-Br)  were  prepared  by  using
                 FeSO 4·7H 2O  as  precursor,  2-bromoisobutyric  acid  as  surface  modifier  with  the  aids  of  ethylenediamine
                 under pH=9. Subsequently, double-responsive poly(2-(dimethylamino) ethyl methacrylate) (PDMAEMA)
                 was  grafted  from  γ-FeOOH-Br  nanoparticles  by  surface  initiated  atomic  transfer  radical  polymerization
                 (SI-ATRP) method to obtain γ-FeOOH-g-PDMAEMA particle brushes, which were further used as a solid
                 particle emulsifier to prepare Pickering emulsion. The obtained products were characterized systematically by
                 SEM,  TEM,  FT-IR,  TGA,  Zeta  potential,  and  particle  size  analyzer.  The  stability,  pH  and  temperature
                 response  of  particle  brushes  stabilized  Pickering  emulsion  were  studied.  The  results  showed  that  the
                 morphologies of both γ-FeOOH-Br and γ-FeOOH-g-PDMAEMA were needle-like. The size of γ-FeOOH-Br was
                 700 nm long and 50 nm wide, and the length and width of γ-FeOOH-g-PDMAEMA were increased to 710
                 and 80 nm, respectively. γ-FeOOH-g-PDMAEMA emulsifier had a low critical solution temperature (LCST)

                 收稿日期:2019-05-23;  定用日期:2019-07-16; DOI: 10.13550/j.jxhg.20190461
                 基金项目:安徽省高等学校自然科学研究重大项目(KJ2019ZD01);安徽省留学人员创新重点项目(2019LCX006);安徽省高等学校
                 自然科学研究项目(KJ2018A0036)
                 作者简介:王   肖(1996—),女,硕士生。联系人:张建安(1974—),男,副教授,ORCID ID: orcid.org/0000-0003-3195-9882,Jianan
                 Zhang,E-mail:jianan@ahu.edu.cn。
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