1. Microencapsulation of hexadecane by surface-initiated atom transfer radical polymerization on a Pickering stabilizer
- Author
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Dezhong Yin, Baoliang Zhang, Wangchang Geng, Qiuyu Zhang, and Jinjie Liu
- Subjects
Atom-transfer radical-polymerization ,Radical polymerization ,Chain transfer ,General Chemistry ,Hexadecane ,Catalysis ,Pickering emulsion ,chemistry.chemical_compound ,chemistry ,Polymerization ,Polymer chemistry ,Materials Chemistry ,Methyl methacrylate ,Ionic polymerization - Abstract
Hexadecane-loaded microcapsules with SiO2–poly(methyl methacrylate) (PMMA) hybrids as shells were prepared by surface-initiated atom transfer radical polymerization (SI-ATRP) in an oil-in-water Pickering emulsion. ATRP-initiators were introduced onto SiO2 particles by a homemade silane coupling reagent containing a 2-bromoisobutyrate group. SI-ATRP polymerization was conducted on Pickering stabilizers based on activators regenerated by electron transfer (ARGET). TGA results indicated that 80.3% of PMMA chains in the shell were covalently-bonded to SiO2, which was formed by SI-ATRP polymerization. The microcapsules show excellent potential for thermal energy storage, as evidenced by a high melting enthalpy of 161.7 J g−1.
- Published
- 2015