Study of Influential Factors in Double-shell Phase Change Micro-nano Capsules Preparation

doi:10.11901/1005.3093.2014.378

Chinese Journal of Materials Research

2015, Vol. 29

Issue (2): 135-142 DOI: 10.11901/1005.3093.2014.378

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Study of Influential Factors in Double-shell Phase Change Micro-nano Capsules Preparation

Jianli SHANG,Hao ZHANG(

),Li DONG,Xilong ZHAO

College of Materials & Mineral Resources, Xi’an University of Architecture & Technology, Shaanxi 710055, China

Cite this article:

Jianli SHANG,Hao ZHANG,Li DONG,Xilong ZHAO. Study of Influential Factors in Double-shell Phase Change Micro-nano Capsules Preparation. Chinese Journal of Materials Research, 2015, 29(2): 135-142.

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Abstract

Double-shell phase change nano-capsules were prepared by the emulsion interfacial polymerization method with phase change materials as core, polystyrene as inner shell, hydrophilic chitosan as outer shell, with a 1:1 ratio of core to shell, sodium dodecyl sulfate as emulsifier, hexadecane as co-emulsifier and azodiisobutyronitrile as initiator. The prepared capsules were characterized by fourier transform infrared (FT-IR), differential scanning calorimetry (DSC), scanning electron microscope (SEM), laser particle size analyzer (LPSA) etc. The results show that the morphology of the double-shell phase change nano-capsules was greatly influenced by the kind of cores, the amount of emulsifier, co-emulsifier and initiator, and also related to phacoemulsification time and mixing speed.

Key words: organic polymer materials double-shell phase change micro-nano capsules miniemulsion interfacial polymerization method morphology particle size affect factor

Received: 24 July 2014

Fund: *Supported by National Natural Science Foundation of China No. 51172176.

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	Jianli SHANG
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	Xilong ZHAO

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https://www.cjmr.org/EN/10.11901/1005.3093.2014.378 OR https://www.cjmr.org/EN/Y2015/V29/I2/135

Table 1 Relative humidity of saturated salt in water (25℃)

Fig.1 FI-IR spectra of methyl methacrylate (a), chitosan (b) and double-shell phase change micro-nano capsules (c)

Fig.2 SEM images of double-shell phase change micro-nano capsules affected by different kind core (a) n-dodecyl alcohol, (b) n-octadecane

Fig.3 SEM images of double-shell phase change micro-nano capsules affected by different amount emulsifier (a) emulsifier content is 2%, (b) emulsifier content is 3%

Fig.4 LPSA images of double-shell phase change micro-nano capsules affected by different amount co-emulsifier (a) co-emulsifier content is 0.1%, (b) co-emulsifier content is 0.3%, co-emulsifier content is 0.6% (c)

Table 2 Particle size of double-shell phase change micronano capsules affected by different amount initiator

Fig.5 Images of double-shell phase change micro-nano capsules affected by different phacoemulsification time (a) phacoemulsification time is 5 min, (b) phacoemulsification time is 10 min, (c) phacoemulsification time is 15 min

Fig.6 SEM images of double-shell phase change micro-nano capsules affected by different mixing speed (a) mixing speed is 500 r/min, (b) mixing speed is 800 r/min, (c) mixing speed is 1000 r/min

Fig.7 DSC curve of double-shell phase change micro-nano capsules

Fig.8 Isotherm sorption curves of double-shell phase change micro-nano capsules

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