双壳微纳米相变胶囊制备影响因素的研究

doi:10.11901/1005.3093.2014.378

材料研究学报

2015, Vol. 29

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

本期目录 | 过刊浏览

双壳微纳米相变胶囊制备影响因素的研究

尚建丽,张浩(

),董莉,赵喜龙

西安建筑科技大学材料与矿资学院西安 710055

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

引用本文:

尚建丽,张浩,董莉,赵喜龙. 双壳微纳米相变胶囊制备影响因素的研究[J]. 材料研究学报, 2015, 29(2): 135-142.
Jianli SHANG, Hao ZHANG, Li DONG, Xilong ZHAO. Study of Influential Factors in Double-shell Phase Change Micro-nano Capsules Preparation[J]. Chinese Journal of Materials Research, 2015, 29(2): 135-142.

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摘要:

以相变材料为芯材、聚苯乙烯为内壳、亲水性壳聚糖为外壳、以十二烷基硫酸钠为乳化剂、十六烷为助乳化剂、偶氮二异丁腈为引发剂, 壳核比为1∶1, 用细乳液界面聚合法制备双壳微纳米相变胶囊, 用FT-IR、DSC、SEM、LPSA对其表征, 研究了芯材种类、乳化剂用量、助乳化剂用量、引发剂用量、超声乳化时间、搅拌速度等对双壳微纳米相变胶囊形貌的影响。结果表明, 双壳微纳米相变胶囊形貌受到芯材种类、乳化剂用量、助乳化剂用量以及引发剂用量的影响较大, 也与超声乳化时间和搅拌速度有关, 并得到相应最佳工艺参数。

关键词 ：有机高分子材料, 双壳微纳米相变胶囊, 细乳液界面聚合法, 形貌, 粒径, 影响因素

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

收稿日期: 2014-07-24

基金资助:* 国家自然科学基金51172176资助项目。

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表1 饱和盐溶液的相对湿度及饱和度(25℃)

图1 甲基丙烯酸甲酯、壳聚糖以及双壳微纳米相变胶囊的红外光谱图

图2 芯材为正十二醇或正十八烷的双壳微纳米相变胶囊SEM照片

图3 乳化剂用量为2%或3%的双壳微纳米相变胶囊SEM照片

图4 助乳化剂用量为0.1%、0.3%或0.6%的双壳微纳米相变胶囊激光粒度图

表 2 不同引发剂用量对双壳微纳米相变胶囊粒径的影响

图5 超声乳化时间为5 min、10 min或15 min的双壳微纳米相变胶囊照片

图6 搅拌速度为500 r/min、800 r/min或1000 r/min的双壳微纳米相变胶囊SEM照片

图7 双壳微纳米相变胶囊的DSC曲线

图8 双壳微纳米相变胶囊的等温吸放湿曲线

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