文章信息/Info

Title:

Optical Absorption Properties and Nanostructures of Self-Assembled Block Copolymer/Nanoparticle Hybrids

作者:

劉早錦; 許占文; 林嘉平

（華東理工大學材料科學與工程學院，上海市先進聚合物材料重點實驗室，上海，200237）

Author(s):

LIU Zaojin; XU Zhanwen; LIN Jiaping

(Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China）

關(guān)鍵詞:

雜化結(jié)構(gòu); 耗散粒子動力學; 時域有限差分法; 光吸收性能

Keywords:

hybrid nanostructures;  dissipative particle dynamics;  finite-difference time-domain method;  optical absorption properties

DOI:

10.7502/j.issn.1674-3962.2019.05.03

文獻標志碼:

A

摘要:

結(jié)合耗散粒子動力學模擬和時域有限差分方法，研究了兩嵌段共聚物（AB）/納米粒子共混體系的自組裝行為及其光吸收性能，分析了納米粒子與嵌段之間的相互作用參數(shù)、納米粒子大小和共聚物結(jié)構(gòu)對納米粒子在雜化結(jié)構(gòu)中的分布及其光吸收性能的影響。結(jié)果表明，AB/納米粒子共混體系可形成層狀雜化結(jié)構(gòu)，并且調(diào)節(jié)相互作用參數(shù)、納米粒子大小可以控制納米粒子分布在A、B相界面或B相，另外共聚物結(jié)構(gòu)也會影響納米粒子在B相中的分布。當雜化結(jié)構(gòu)中納米粒子分布不同時，其光吸收率存在顯著差異。在可見光范圍內(nèi)，納米粒子聚集在B相的雜化結(jié)構(gòu)的光吸收率顯著高于納米粒子分布在A、B相界面處的光吸收率，最高可提升75%。改變納米粒子的分布調(diào)控雜化結(jié)構(gòu)的光吸收率，為設(shè)計具有優(yōu)異光吸收性能的雜化材料提供了指導。

Abstract:

The self-assembly behavior and optical absorption property of the blending system involving AB diblock copolymers and nanoparticles were studied by combining dissipative particle dynamics and finite�瞕ifference time�瞕omain method. The effects of the interaction parameters between nanoparticles and segments, the size of nanoparticles and the structures of copolymers on the distribution of nanoparticles and optical absorption of hybrid nanostructures were investigated. It was found that AB diblock copolymers/nanoparticles blends can self�瞐ssemble into lamellar hybrid nanostructures, varying the interaction parameters and the size of nanoparticles can regulate the distribution of nanoparticles at the interface between A and B phase or at B phase. Besides, the architecture of copolymers can also affect the distribution of nanoparticles in B phase. There is a remarkable difference in the optical absorption performance when the distribution of nanoparticles in hybrid nanostructures has been changed. In the visible range, the optical absorption of the hybrid nanostructures in which the nanoparticles were concentrated in the B phase is higher than that in which the nanoparticles distributed at the interface between A and B phase. The optical absorption of the former hybrid nanostructure is higher than that of the latter one by 75%. The optical absorption can be adjusted by controlling the nanoparticle distribution in hybrid nanostructures. This work would provide guidance for designing advanced hybrid materials with excellent optical absorption performance.