不同表面性质纳米棒在有或无剪切场对二元不相容高分子共混体系相分离动力学的影响
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- 英文论文题名：The Effect of Different Surface Properties of Nanorods on The Dynamics of Phase Separation of Immiscible Binary Polymer Blends With or Without Shear Flow
- 论文作者：周永祥 ; 黄满霞 ; 郭洪霞
- 英文论文作者：Yongxiang Zhou ; Manxia Huang ; Hongxia Guo ; Institute of Chemistry ; Chinese Academy of Sciences
- 年：2016
- 作者机构：中国科学院化学研究所高分子物理与化学国家重点实验室;
- 论文关键词：Janus ; 相分离 ; 增容剂 ; 剪切
- 会议召开时间：2016-08-25
- 会议录名称：中国化学会2016年软物质理论计算与模拟会议论文摘要集
- 语种：中文
- 分类号：O631;TB383.1
- 学会代码：ZGHY
- 会议名称：中国化学会2016年软物质理论计算与模拟会议
- 会议地点：中国天津
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：2
- 文件大小：187k
- 原文格式：D
- 会议级别：全国
摘要
在这个工作中,我们采用耗散粒子动力学(dissipative particle dynamics)模拟,系统地研究了在有或无剪切场的情况下,不同表面性质纳米棒对二元不相容高分子共混体系相分离动力学的影响。主要有三种不同表面性质纳米棒。其中,Janus纳米棒(CJs)总是可以牢牢地吸附在界面上,然而全同双亲纳米棒(C2s)则容易从界面上掉下来。另外,含有全同单亲纳米棒(C1s)体系则会发生微相分离。还有,在剪切场下,剪切流作用会诱导含有CJs的体系由微乳结构变成层状结构。然而,剪切会对含有C1s或者C2s体系的相区增长促进的作用,加快相分离。所以,Janus纳米棒对二元不相容共混高分子体系是十分适合做增容剂的。
In the present work,by using dissipative particle dynamics(DPD) simulations,we have systematically studied the effect of nanorods with different surface properties on the dynamics of phase separation of binary immiscible polymer blends with or without shear flow.There are mainly three types of different surface properties of nanorods.The Janus nanorods(denoted by CJs) always can strongly adsorb at the interface of two kinds of immiscible homopolymers while the isotropic nanorods interacting equally favorable to both kinds of polymers(denoted by C2s) would desorb from the interface when the affinity to polymers are too strong.The ternary systems containing the isotropic nanorods interacting favorable to one of two homopolymers(denoted by C1s) undergo microphase separation.With shear flow,the ternary blends containing CJs form a lamellar phase.On contrary,shear flow improves the growth of domain of the ternary blends containing C1 s or C2 s.Thus Janus nanorods are the best suit to act as an emulsifying or stabilizing agent for binary immiscible polymer blends.
In the present work,by using dissipative particle dynamics(DPD) simulations,we have systematically studied the effect of nanorods with different surface properties on the dynamics of phase separation of binary immiscible polymer blends with or without shear flow.There are mainly three types of different surface properties of nanorods.The Janus nanorods(denoted by CJs) always can strongly adsorb at the interface of two kinds of immiscible homopolymers while the isotropic nanorods interacting equally favorable to both kinds of polymers(denoted by C2s) would desorb from the interface when the affinity to polymers are too strong.The ternary systems containing the isotropic nanorods interacting favorable to one of two homopolymers(denoted by C1s) undergo microphase separation.With shear flow,the ternary blends containing CJs form a lamellar phase.On contrary,shear flow improves the growth of domain of the ternary blends containing C1 s or C2 s.Thus Janus nanorods are the best suit to act as an emulsifying or stabilizing agent for binary immiscible polymer blends.
引文