Synthesis of mesoporous silica spheres utilizing in tandem with POSS-based block copolymer and anion surfactant as dual-template
| Autor: | Birong Zeng, Sun Xiaoqing, Li Yuntong, Lizong Dai, He Kaiwei, Tong Shen, Meng Li, Conghui Yuan, Li Cong, Yiting Xu, Jilu Li |
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| Rok vydání: | 2018 |
| Předmět: |
Acrylate
Materials science Polymers and Plastics Radical polymerization 02 engineering and technology Mesoporous silica 010402 general chemistry 021001 nanoscience & nanotechnology Methacrylate 01 natural sciences Silsesquioxane 0104 chemical sciences chemistry.chemical_compound Colloid and Surface Chemistry chemistry Chemical engineering Materials Chemistry Copolymer Physical and Theoretical Chemistry Sodium dodecyl sulfate 0210 nano-technology BET theory |
| Zdroj: | Colloid and Polymer Science. 296:1533-1544 |
| ISSN: | 1435-1536 0303-402X |
| Popis: | In this work, novel mesoporous silica spheres were prepared by calcination of golf-shaped silica microspheres, which were fabricated via a typical sol-gel method by using synthetic amphiphilic block copolymer poly(acrylate isobutyl polyhedral oligomeric silsesquioxane)-b-poly(dimethylaminoethyl methacrylate co-styrene)) (PAPOSS-b-(PDMAEMA-co-PSt) and anionic surfactant sodium dodecyl sulfate (SDS) as dual-template. Firstly, three different POSS-based block copolymers were synthesized through subsequent homopolymerization of acrylate isobutyl POSS and chain extension of dimethylaminoethyl methacrylate (DMAEMA) and styrene with various feed ratios via reversible transfer radical polymerization (RAFT). These amphiphilic block polymers and SDS were utilized as cooperative template to golf-shaped silica microspheres. The electrostatic interaction between protonated PDMAEMA segments and anion surfactant as well as the strong interaction between PAPOSS segments and silicon source plays the dominant role in forming golf-shaped silica spheres. Moreover, the surface morphology of silica spheres can be tuned by varying molar ratio of PDMAEMA/PAPOSS. The resulting golf-shaped silica microspheres were further calcined to give mesoporous silica spheres which exhibited a BET surface area of 1031 m2 g−1, a total pore volume of 0.826 cm3 g−1, and a narrow pore size distribution centered at 3.20 nm. |
| Databáze: | OpenAIRE |
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