高分子链构象与纳米颗粒尺寸的关系  

On the Relations Between the Configuration of Polymer Chain and the Size of Nanoparticle

作　　者：李越 郭金权 李朝阳[1] 

机构地区：[1]杭州师范大学理学院,浙江杭州310036

出　　处：《杭州师范大学学报（自然科学版）》2017年第6期672-675,共4页Journal of Hangzhou Normal University(Natural Science Edition)

基　　金：浙江省自然科学基金项目(LY15A040009)

摘　　要：用蒙特卡罗方法研究了吸附在纳米颗粒表面的高分子链,计算了高分子链的均方回转半径<R_G^2>,研究了<R_G^2>与高分子链-纳米颗粒相互作用强度ε_(pn)、纳米颗粒直径σn的关系,结果发现<R_G^2>严重地依赖于σ_n和ε_(pn),并且存在一个临界高分子链-纳米颗粒相互作用强度ε_(pn)*.当ε_(pn)<ε_(pn)*时,<R_G^2>几乎不受纳米颗粒的影响;当ε_(pn)>ε_(pn)*时,<R_G^2>随εpn的增加而减小并趋于稳定;当ε_(pn)足够大时,<R_G^2>随σ_n的增加先减后增.The conformational properties of a polymer chain adsorbed on a spherical nanoparticle are studied by using Monte Carlo simulations. The configuration of polymer represented by the ean square radius of gyration of polymer RG2 is calculated. And the relations among RG2, the polymer-nanoparticle interaction strength epn and the diameter of nanoparticle a. are researched. The results show that RG2 is dependent strongly on epn and a,. A critical value of . denoted as , is found. When is independent of pn. When pn RG decreases with the increase in epo and tends to a constant at large Cpn. For a large ep, R62） decreases firstly and then increases with the increase in an.

关 键 词：高分子链 纳米颗粒 蒙特卡罗 构象 

分 类 号：O631.1[理学—高分子化学]