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H poly sulfo ne shell and n-hexadecane core were prepared in t

微反应器与溶剂挥发法制备相变蓄热材料微胶囊

化工学报, no. 05 (2009): 226-233

Cited by: 2|Views12
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Abstract

采用正十六烷为芯材,聚砜为壳材,二氯甲烷为有机溶剂,十二烷基磺酸钠与明胶的溶液为水相,在液相中利用溶剂挥发法制备了相变蓄热材料微胶囊。根据微胶囊形成机理将制备过程解耦成两个步骤,先利用微尺度反应器可控产生粒径均一的O/W型液滴,再将液滴在固化浴中脱除溶剂固化得到微胶囊。考察了连续相流速、分散相流速、微通道尺寸等因素对微反应器错流剪切模式产生液滴的粒径及单分散性的影响;并对微胶囊的结构和蓄热特性进行了扫描电镜和差示扫描量热仪的表征。结果表明这种解耦方法能够实现可控制备粒径均匀的相变蓄热材料微胶囊,相变热大于75J·g-1。

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ENPreparation of phase change material micro-capsules by micro-reactor and solvent evaporation approach
Introduction
  • Foundat ion item:su pported b y t he N at ional N at ural S cience.
  • 2008 -11 -10 收到初稿, 2009 -01 -05 收到修改稿 。
  • 联系人 :程易 。 第一作者 :刘喆 ( 1982 — ) , 男, 博士研究生 。
Highlights
  • Foundat ion item:su pported b y t he N at ional N at ural S cience
  • h poly sulfo ne shell and n-hexadecane core were prepared in t
  • ere characte rized by SEM and DSC.T
Results
  • Corresponding author:Prof .CH ENG Yi .E -mail :yich eng @
  • Foundati on of Chi na ( 20776074) .
  • 7401F ;差示扫描量热仪 :Shim adzu DSC-T A 60 。
  • 法制备 PCM 微胶囊的复杂过程分解为两个步骤 : 图 1 实验设计示意图
  • 反应器, 分散相通道 N d 为 0.184 mm , 连 续相通
  • 心 、 空心图标分别表示 N c =1.6 与 1.0 mm 时液滴
  • 0.390 mm, 考察了液滴尺寸的变化 。如图 5 所示, 实心 、 空心图标分别表示 N d =0.390 与 0.184 mm
  • Effect o f channel size o f disper se phase on the droplet size
Conclusion
  • 如溶液 a, 如图 6 ( a) 所示, N d 为 0.184 mm 时, 可产生大于 243 μm 的单分散液滴, 但 N d 为 0.390
  • R · min -1 , 固化浴温度为室温, 固化时间 1 h 。 微
  • 10 ( d) 为 250 μm 微胶囊 的断面结构 。 从此结构
Summary
  • Foundat ion item:su pported b y t he N at ional N at ural S cience.
  • 2008 -11 -10 收到初稿, 2009 -01 -05 收到修改稿 。
  • 联系人 :程易 。 第一作者 :刘喆 ( 1982 — ) , 男, 博士研究生 。
  • Corresponding author:Prof .CH ENG Yi .E -mail :yich eng @
  • Foundati on of Chi na ( 20776074) .
  • 7401F ;差示扫描量热仪 :Shim adzu DSC-T A 60 。
  • 法制备 PCM 微胶囊的复杂过程分解为两个步骤 : 图 1 实验设计示意图
  • 反应器, 分散相通道 N d 为 0.184 mm , 连 续相通
  • 心 、 空心图标分别表示 N c =1.6 与 1.0 mm 时液滴
  • 0.390 mm, 考察了液滴尺寸的变化 。如图 5 所示, 实心 、 空心图标分别表示 N d =0.390 与 0.184 mm
  • Effect o f channel size o f disper se phase on the droplet size
  • 如溶液 a, 如图 6 ( a) 所示, N d 为 0.184 mm 时, 可产生大于 243 μm 的单分散液滴, 但 N d 为 0.390
  • R · min -1 , 固化浴温度为室温, 固化时间 1 h 。 微
  • 10 ( d) 为 250 μm 微胶囊 的断面结构 。 从此结构
Tables
  • Table1: Table 1
  • Table2: Flow rate of continuous and disperse phases for flow shearing experiments
Download tables as Excel
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