海藻酸钠衍生物对水乳液在靶标表面行为的影响  

Effect of Sodium Alginate Derivative on Behavior of Water Emulsion on Target Surface

作　　者：肖敦抄 冯玉红[1] 李嘉诚[1] 陈凯[1] 何富瑞 周庆丰[1] XIAO Dun-chao FENG Yu-hong LI Jia-cheng CHEN Kai HE Fu-rui ZHOU Qing-feng(College of Materials and Chemical Engineering, Hainan University, Haikou 570228, Hainan, Chin)

机构地区：[1]海南大学材料与化工学院,海南海口570228

出　　处：《精细化工》2017年第2期172-178,共7页Fine Chemicals

基　　金：国家自然科学基金(21366010;21566009);海南省自然科学基金(213010;20162013;20162016);海南省重点科技计划(cxy20150026);海南省水环境污染治理与资源化重点实验室开放基金资助~~

摘　　要：采用反相乳化法制备了以烷基糖苷(APG)为乳化剂的高效氯氟氰菊酯水乳液。测定了药液的动、静态表面张力、接触角以及在香蕉叶片上的持留量和药物吸附量,考察了胆固醇改性海藻酸钠衍生物(CSAD)对载药水乳液在叶片上的润湿性和沉积量的影响。结果表明:室温下,CSAD+APG体系和APG单独体系稳定的水乳液中表面活性剂(APG)的临界胶束质量浓度均为0.1 g/L。当ρAPG=0.1 g/L时,两种体系药液的最大持留量分别为0.010 4和0.007 8 g/cm2,粘附张力分别为24.32和16.14 m N/m,粘附功分别为55.23和46.47 m N/m;在叶片上的药物吸附量分别为524和412μg/L。由此推断:两亲性嵌段聚合物CSAD是通过疏水作用与APG形成混合胶束吸附在固液界面,其有效地提高了药液在叶片上的持留量和药物吸附量。The cyhalothrin water emulsion containing cholesteryl grafted sodium alginate derivative（CSAD） was prepared via an inverse emulsion method by using nonionic surfactant alkyl polyglycosides（APG） as an emulsifier. And its dynamic and static surface tension,contact angle,retention and pesticide adsorption capacity was measured. Subsequently,the influence of CSAD on the wettability and deposition capacity of cyhalothrin in water emulsion on the banana leaf surface was investigated The results showed that the critical micelle concentration of APG（ρAPG） in the CSAD ＋ APG system and the APG system stable water emulsion was both 0. 1 g/L at room temperature. In addition,for the above two systems,when the ρAPGwas 0. 1 g/L,the maximum retention on leaves was 0. 010 4 and0. 007 8 g/cm2,the adhesion tension was 24. 32 and 16. 14 m N/m,and the adhesion work was 55. 23 and 46. 47 m N/m,respectively. Furthermore,the CSAD ＋ APG system showed a much higher pesticide adsorption capacity on leaves（524 μg/L）,while the corresponding value was only 412 μg/L for the APG system. In general,the addition of the amphiphilic CSAD could effectively enhance the retention and adsorption capacity of water emulsion on banana leaves due to the formation of CSAD-APG complexes adsorbed at the solid-liquid interface.

关 键 词：水乳液 润湿性 铺展性 持留量 吸附量 表面活性剂 

分 类 号：TQ423[化学工程]