结构可控的聚合物长短刷接枝纳米粒子

欧华林; 张宝庆; 刘琛阳

doi:10.11777/j.issn1000-3304.2022.22110

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结构可控的聚合物长短刷接枝纳米粒子

研究论文 | 更新时间：2024-10-08

- 结构可控的聚合物长短刷接枝纳米粒子
- Bimodal Polymer-grafted Nanoparticles with Precisely Controlled Structures
- 高分子学报 2022年53卷第11期页码：1388-1398
- 作者机构：
  
  1.中国科学院化学研究所北京分子科学国家研究中心中国科学院工程塑料重点实验室北京 100190
  2.中国科学院大学北京 100049
- 作者简介：
  
  E-mail: liucy@iccas.ac.cn
- 基金信息：
  
  国家自然科学基金(基金号 21973105)
- DOI：10.11777/j.issn1000-3304.2022.22110
  中图分类号：
- 纸质出版日期：2022-11-20，
  
  网络出版日期：2022-08-23，
  
  收稿日期：2022-04-03，
  
  录用日期：2022-05-18
- 稿件说明：
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欧华林,张宝庆,刘琛阳.结构可控的聚合物长短刷接枝纳米粒子[J].高分子学报,2022,53(11):1388-1398.

Ou Hua-lin,Zhang Bao-qing,Liu Chen-yang.Bimodal Polymer-grafted Nanoparticles with Precisely Controlled Structures[J].ACTA POLYMERICA SINICA,2022,53(11):1388-1398.
欧华林,张宝庆,刘琛阳.结构可控的聚合物长短刷接枝纳米粒子[J].高分子学报,2022,53(11):1388-1398. DOI： 10.11777/j.issn1000-3304.2022.22110.

Ou Hua-lin,Zhang Bao-qing,Liu Chen-yang.Bimodal Polymer-grafted Nanoparticles with Precisely Controlled Structures[J].ACTA POLYMERICA SINICA,2022,53(11):1388-1398. DOI： 10.11777/j.issn1000-3304.2022.22110.

摘要

通过RAFT聚合制备了一系列窄分子量分布的聚(γ-甲基丙烯酰氧基丙基三乙氧基硅烷)(PTEPM)-

-聚甲基丙烯酸甲酯(PMMA)嵌段共聚物和PTEPM、PMMA低聚物. 将具有不同PMMA分子量的2种PTEPM-

-PMMA共聚物与低聚物PMMA或PTEPM进行共组装(微相分离)，形成片、柱、球等不同PTEPM相区结构. 采用盐酸气氛处理，PTEPM相区水解交联形成倍半硅氧烷SiO

1.5

内核，分离纯化得到聚合物长短刷接枝纳米粒子.使用这种相分离-交联-分散制备方法，调节嵌段共聚物分子结构和三组分比例，可实现聚合物接枝纳米粒子内核形状和尺寸、接枝密度、长短刷比例、长刷长度的精确调控. 这些纳米粒子是研究聚合物纳米复合材料结构-性能关系的理想模型体系.

Abstract

A series of poly(3-(triethoxysilyl)propyl methacrylate) (PTEPM) oligomers (oT)

polymethylmethacrylate (PMMA) oligomers (oM)

and block copolymers of PTEPM-

-PMMA with narrow molecular weight distributions were synthesized using RAFT polymerization. Two PTEPM-

-PMMA copolymers with the PMMA blocks of different molecular weights were co-assembled with the oligomers of PMMA or PTEPM to form various ordered nanoscale

structures

such as lamellae

cylinders

and spheres. PTEPM block could be crosslinked to form silsesquioxane core (

i.e.

SiO

1.5

)

when the obtained co-assembly materials were immersed in hydrochloric acid atmosphere. After appropriate separation and purification

the bimodal polymer grafted nanoparticles (PGNPs) with different microstructures could be prepared. Using this assembling-crosslinking-dispersing (ACD) method and adjusting the molecular structure of block copolymer and the ratio of the three components (PTEPM-

-PMMA

and oM)

the structural parameters of bimodal PGNPs

including the shape and size of core

grafting density

molar ratio between long and short brushes

and length of long brushes

could be precisely controlled. By adjusting the proportions of two block copolymers with the PMMA blocks of different molecular weights and the amounts of oMs

bimodal PGNPs with different molar ratios of long and short brushes could be prepared. By adjusting the molecular weight of the long brush and the amounts of oM

bimodal PGNPs with different lengths of long brushes were obtained. By adjusting the amounts of oM and oT

bimodal PGNPs with the same core shape but different sizes were obtained. By adjusting the amounts of oM

bimodal PGNPs with the same core weight but different shapes (cylindrical or spherical) were obtained. These nanoparticles are ideal model models for studying the relationship between the microstructures and properties of polymer nanocomposites.

关键词

嵌段共聚物聚合物接枝纳米粒子二氧化硅双分布刷

Keywords

Block copolymerPolymer grafted nanoparticlesSilica dioxideBimodal brushes

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