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第 36 卷第 7 期                             精   细   化   工                                  Vol.36, No.7
             201 9 年 7 月                             FINE CHEMICALS                                 July    2019


              表面活性剂
              双羟基 Gemini 表面活性剂的溶液性能及其聚集形态



                                                                *
                                             钱逢宜,李   蓉 ,任学宏
                                  (江南大学  生态纺织教育部重点实验室,江苏  无锡    214122)


                 摘要:以 1-溴十二烷、2-甲氨基乙醇、1,3-二溴丙烷、1,4-二溴丁烷、1,6-二溴己烷、1,8-二溴辛烷、1,10-二溴癸
                 烷和 1,12-二溴十二烷为原料,制得含有双羟基的 Gemini 表面活性剂〔缩写为 12(OH)-s-12(OH),其中 s = 3、4、
                 6、8、10 和 12〕。并测定了双羟基 Gemini 表面活性剂的热稳定性及其在水溶液中的表面张力及泡沫性能;采用
                 耗散粒子动力学(DPD)方法预测了 Gemini 表面活性剂在水溶液中的聚集形态。结果表明,该类型 Gemini 表
                 面活性剂具有较好的热稳定性和泡沫性能,随着连接基团长度的增加(s≤6),其在水溶液中的临界胶束浓度
                 (CMC)从 0.62  mmol/L(s=3)降至 0.21  mmol/L(s=6)左右,且当连接基团长度 s>6 后 CMC 基本不变。随
                 着 Gemini 表面活性剂摩尔分数的增加,胶束形态从球状胶束→棒状胶束→层状胶束→反胶束网络结构逐渐转
                 变,且连接基团长度的改变几乎不影响其在水溶液中的胶束形态转变。
                 关键词:Gemini 表面活性剂;表面张力;泡沫性能;耗散粒子动力学模拟;聚集形态
                 中图分类号:TQ423;O648      文献标识码:A      文章编号:1003-5214 (2019) 07-1340-06



                            Properties and Aggregation Morphology of Dihydroxyl
                                    Gemini Surfactants in Aqueous Solution


                                                               *
                                          QIAN Feng-yi, LI Rong , REN Xue-hong
                     (Key Laboratory of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, Jiangsu, China)

                 Abstract: Gemini surfactants containing dihydroxy 〔abbreviated as 12(OH)-s-12(OH), s=3, 4, 6, 8, 10 and
                 12〕  were synthesized using 1-bromododecane, 2-methylaminoethanol, 1,3-dibromopropane, 1,4-dibromobutane,
                 1,6-dibromohexane, 1,8-dibromooctane, 1,10-dibromodecane and 1,12-dibromododecane as raw materials.
                 The  thermal  property of  Gemini surfactants and their surface tensions  in  aqueous  solution  were
                 characterized.  Their  foam  properties  were  tested.  The  aggregation  morphology  of  Gemini  surfactants  in
                 aqueous solution was predicted by using dissipative particle dynamics (DPD). The results indicated that
                 these  Gemini  surfactants  had  good  thermal  property  and  foaming  property.  With  the  increase  of  spacer
                 length  (s≤6),  the  critical  micelle  concentration  (CMC)  of  Gemini  surfactants  in  aqueous  solution  were
                 decreased from 0.62 mmol/L (s=3) to about 0.21 mmol/L(s=6). The CMC almost kept unchanged when the
                 spacer length further increased (s>6). When the molar fraction of Gemini surfactant increased, the micellar
                 morphology  gradually  changed  from  spherical  micelle  to  rod  micelle  to  layered  micelle  eventually  to
                 reverse micelle network structure. Moreover, the change of spacer group length of the Gemini surfactants
                 hardly affected the change of its micellar morphology in aqueous solution.
                 Key  words:  Gemini  surfactant;  surface  tension;  foaming  property;  dissipative  particle  dynamics;
                 aggregation behavior


                 自 Gemini 表面活性剂成功合成以来,由于其具                     连接基团和头基的化学结构,Gemini 表面活性剂可
            有更高的表面活性、更低的临界胶束浓度等,引起                             以呈现丰富多样的分子结构和奇特的自组装行为                     [7-8] 。
            了国内外研究者们的广泛关注              [1-6] 。通过改变尾链、          如 Zhang 等人比较了连接基团中含有双键的 12-fo-12

                 收稿日期:2018-12-27;  定用日期:2019-03-12; DOI: 10.13550/j.jxhg.20180958
                 基金项目:国家自然科学基金(21706093)
                 作者简介:钱逢宜(1995—),男,硕士生,E-mail:fyqian@hotmail.com。联系人:李   蓉(1981—),女,副教授,E-mail:rongli0719@
                 163.com。
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