基于3D受限自组装构筑中空介孔氧化硅/碳复合微球

王勉; 邓仁华; 朱锦涛

doi:10.11777/j.issn1000-3304.2023.23299

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基于3D受限自组装构筑中空介孔氧化硅/碳复合微球

研究论文 | 更新时间：2024-09-20

- 基于3D受限自组装构筑中空介孔氧化硅/碳复合微球
- Silica/Carbon Composite Hollow Mesoporous Microparticles by 3D Confined Self-assembly
- 高分子学报 2024年55卷第5期页码：604-613
- 作者机构：
  
  华中科技大学化学与化工学院能量转换与存储材料化学教育部重点实验室材料化学与服役失效湖北省重点实验室武汉 430074
- 作者简介：
  
  E-mail: rhdeng@hust.edu.cn
- 基金信息：
  
  国家自然科学基金(基金号52273010;52322314)
- DOI：10.11777/j.issn1000-3304.2023.23299
  中图分类号：
- 纸质出版日期：2024-05-20，
  
  网络出版日期：2024-03-11，
  
  收稿日期：2023-12-28，
  
  录用日期：2024-01-31
- 稿件说明：
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王勉, 邓仁华, 朱锦涛. 基于3D受限自组装构筑中空介孔氧化硅/碳复合微球. 高分子学报, 2024, 55(5), 604-613

Wang, M.; Deng, R. H.; Zhu, J. T. Silica/carbon composite hollow mesoporous microparticles by 3D confined self-assembly. Acta Polymerica Sinica, 2024, 55(5), 604-613
王勉, 邓仁华, 朱锦涛. 基于3D受限自组装构筑中空介孔氧化硅/碳复合微球. 高分子学报, 2024, 55(5), 604-613 DOI： 10.11777/j.issn1000-3304.2023.23299.

Wang, M.; Deng, R. H.; Zhu, J. T. Silica/carbon composite hollow mesoporous microparticles by 3D confined self-assembly. Acta Polymerica Sinica, 2024, 55(5), 604-613 DOI： 10.11777/j.issn1000-3304.2023.23299.

摘要

发展简单、高效、可控的方法来制备中空介孔微球是介孔材料领域的研究热点. 本工作结合嵌段共聚物的三维受限自组装(3D-CSA)和自模板碳化策略，建立了一种构筑中空介孔微球的新方法. 首先，采用乳液-溶剂挥发法实现嵌段共聚物与全氟辛烷(PFO)在3D受限空间的分级组装，获得了核-壳结构微球，其中壳层由微相分离的嵌段共聚物构成. 然后，在壳层的连续相选择性地复合氧化硅，既实现了无机框架的负载，又实现了对连续相聚合物链选择性交联. 对复合微球进行煅烧处理后，实现了壳层连续相聚合物的选择性碳化，获得了中空介孔氧化硅/碳复合微球. 本研究系统地阐述了核-壳型分级结构微球的形成机理和必备条件，研究了氧化硅前驱体添加量和嵌段共聚物分子量对中空介孔氧化硅/碳复合微球形貌的影响，为制备中空介孔微球材料提供了一种简便、可控的方法.

Abstract

Hollow mesoporous microparticles have attracted much attention because of their unique internal cavity structure and functional shell

which combines the physical and chemical properties of mesoporous materials. It is therefore of great interest to develop facile

effective

and controllable methods for the preparation of hollow mesoporous microspheres. This research proposes a new strategy for creating silica/carbon composite hollow mesoporous microparticles

via

the combination of three-dimensional confined self-assembly (3D-CSA) of block copolymer (BCP) and a self-template carbonization strategy. Firstly

using the 3D-CSA method

the BCP and perfluorooctane (PFO) underwent hierarchical self-assembly into core-shell microparticles. Notably

the shell was composed of BCP with mesostructure

via

microphase separation. Then

the continuous phase of the shell was selectively composited with silicon oxide on purpose of loading of the inorganic frame and cross-linking. Ultimately

the silica/carbon composite hollow mesoporous microspheres were generated by calcining the composite microparticles to selectively carbonize the continuous phase of the shell. The formation mechanism and necessary conditions of core-shell microparticles were systematically described. Additionally

the effects of the amount of precursors and the molecular weight of BCP on the morphology of hollow mesoporous microspheres were studied. This research provides a simple yet controllable method for the creation of novel hollow mesoporous microparticles.

关键词

嵌段共聚物三维受限自组装中空微球介孔微球

Keywords

Block copolymers3D confinementSelf-assemblyHollow microparticlesMesoporous microparticles

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