六方相溶致液晶模板的结构和流变学行为研究  

Study on the structure and rheological behavior ofhexagonal lyotropic liquid crystal template

作　　者：王宝玉 王光 李振宇 武元鹏[1,2] WANG Baoyu;WANG Guang;LI Zhenyu;WU Yuanpeng(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China;The Center of Functional Materials for Working Fluids of Oil and Gas Field,School of New Energy andMaterials,Southwest Petroleum University,Chengdu 610500,China;Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;Spallation Neutron Source Science Centre,Dongguan 523803,China)

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,成都610500 [2]西南石油大学新能源与材料学院油气田工作液功能流体研究中心,成都610500 [3]中国科学院高能物理研究所,北京100049 [4]散裂中子源科学中心,广东东莞523803

出　　处：《功能材料》2024年第12期12131-12136,共6页Journal of Functional Materials

基　　金：广东省基础与应用基础研究基金项目(2021B1515140015);北京市自然科学基金项目(2212051)。

摘　　要：六方相溶致液晶(hexagonal lyotropic liquid crystals,HLLC)是制备在纳米/亚纳米水平上具有精确尺寸和结构纳米材料的理想软模板。研究了表面活性剂分子十二烷基三甲基溴化铵(dodecyltrimethylammonium bromide,DTAB)对其形成的三元HLLC系统结构和物理化学性质的影响。通过偏光显微镜、小角X射线散射技术和流变仪等对HLLC相结构、结构参数和流变学性能进行表征。研究表明,DTAB分子浓度增加,胶束间距、水道宽度和结构域尺寸均变小,但胶束半径变大。同时,随着DTAB分子浓度的增加HLLC体系的动态力学性能越优异。该研究可以更好地了解两性分子对HLLC模板结构和物理化学性质影响的规律,从而为通过分子水平上的组成设计来微调纳米结构参数以及实现纳米结构保留提供理论参考。Hexagonal lyotropic liquid crystals(HLLC)are ideal soft templates for the preparation of nanomaterials with precise size and structure at the nanoscale/sub-nanoscale level.This article reports the influence of surfactant molecule,dodecyltrimethylammonium bromide(DTAB),on the structure and physicochemical properties of the ternary HLLC system formed by it.The phase structure,structural parameters,and rheological properties of the HLLC were characterized by polarized light microscope,small angle X-ray scattering technology,and rheometers.The results showed that with the increase of DTAB molecular concentration,the micelle spacing,channel width and domain size decreased,but the micelle radius increased.At the same time,with the concentration of DTAB molecules increased,the dynamic mechanical properties of the HLLC system became more excellent.This study can better understand the rules of the influence of amphiphilic molecules on the structure and physicochemical properties of HLLC template,thus providing a theoretical reference for fine-tuning the nanostructure parameters and achieving nanostructure retention through the composition design at the molecular level.

关 键 词：六方相溶致液晶 DTAB 理化性质 软模板 纳米材料 

分 类 号：TQ317.3[化学工程—高聚物工业]