Pickering emulsion: A novel template for microencapsulated phase change materials with polymer–silica hybrid shell
MePCMs (microencapsulated phase change materials) with covalently bonded SiO2/polymer hybrid as shell were fabricated via Pickering emulsion polymerization stabilized solely by organically-modified SiO2 particles. Morphology and core–shell structure of these microcapsules were observed by scanning electron microscopy (SEM). Thermal properties of microencapsulated 1-dodecanol were determined using DSC (differential scanning calorimetry) and TGA (thermal gravimetric analysis). The results indicate that mass ratio of St (styrene)/DVB (divinylbenzene)/dodecanol has great effect on the morphology, inner structure, microencapsulation efficiency and durability of resultant MePCMs. When ratio of St/DVB/dodecanol was 5/1/12, dodecanol content of as much as 62.8% is obtained and the utility efficiency of dodecanol reaches 94.2%. The prepared MePCMs present good durability and thermal reliability. 2.2% of core material leached away the microcapsule after suspended in water for 10 days and 5.8% of core material leached after 2000 accelerated thermal cycling. Our study demonstrated that Pickering emulsion polymerization is a simple and robust method for the preparation of MePCMs with polymer–inorganic hybrids as shell.
Year of publication: |
2014
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Authors: | Yin, Dezhong ; Ma, Li ; Liu, Jinjie ; Zhang, Qiuyu |
Published in: |
Energy. - Elsevier, ISSN 0360-5442. - Vol. 64.2014, C, p. 575-581
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Publisher: |
Elsevier |
Subject: | Microencapsulated phase change material | Pickering emulsion | SiO2/polymer hybrid | 1-Dodecanol | Phase separation |
Saved in:
Online Resource