Preparation of monodisper microsphere by controlled droplet solidification

LI Chunlin; XIE Hua; LIU Na; LIN Bingcheng; LIU Zhongmin

doi:10.11949/j.issn.0438-1157.20150919

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Preparation of monodisper microsphere by controlled droplet solidification

更新时间：2025-12-10

- Preparation of monodisper microsphere by controlled droplet solidification
- CIESC Journal Issue 9, Pages: 3654-3660(2015)
- 作者机构：
  
  中国科学院大连化学物理研究所,辽宁,大连,116023
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20150919
  CLC： Q028.8
- Online First：05 September 2015，
  
  Published：05 September 2015
- 稿件说明：
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LI Chunlin, XIE Hua, LIU Na, et al. Preparation of monodisper microsphere by controlled droplet solidification[J]. CIESC Journal, 2015, (9): 3654-3660.
DOI：

LI Chunlin, XIE Hua, LIU Na, et al. Preparation of monodisper microsphere by controlled droplet solidification[J]. CIESC Journal, 2015, (9): 3654-3660. DOI： 10.11949/j.issn.0438-1157.20150919.

摘要

均一尺寸微米功能材料在诸如高分子化学、医药化工、催化以及高效分离等领域都受到普遍关注。现有常规方法很难满足制备单分散、均一性的微米材料的要求。采用微流控技术

在微流控芯片内先生成液滴

然后再在线固化液滴的方法

制备了各种单分散、尺寸均一的微球。通过液滴界面受控导入沉淀剂到液滴中

当所含溶质为固化慢的硅溶胶时

生成实心微球

制备得到表面积达572 m2·g-1、直径变异系数约为2%的纳米孔道二氧化硅微球;当液滴内含沉淀固化较快的溶质

如Zn、Fe、Cu

则可形成水合氧化物或者混合氧化物空心球微球;当含快沉淀也含慢速固化物质时

如含可溶性Fe的硅溶胶时

通过调控沉淀剂进入液滴的速度

也成功了制备了Fe均匀分散在氧化硅内的混合氧化物微球。

Abstract

Uniform size micromeres functional material gets a lot of attention in the fields of polymer chemistry

medicine and chemical industry

catalysis and separation. It is incovenient to prepare monodisperse and uniformity micrometer material by current conventional technology. With microfluidic technology

the droplet was generated in the chip and following to solidify the droplet online to prepare various of monodisperse and size uniformity microsphere. Since the droplet was a Si sol of slow-solidified

the nonporous SiO2 microsphere with a BET surface area of 572 m2·g-1 and a variance coefficient of microsphere diameters of about 2% were produced by introducing precipitator from the interface of droplet. Because the droplets were a material of fast-precipited

such as Zn

or Cu ion

a hollow microsphere consisted of hydrate oxide or mixed oxide was produced. As the droplet contains both materials of fast-precipitated and flow-solidified

such as Si sol containing of Fe ion

SiO2 microsphere with a homogeneous dispersed Fe in it was obtained by adjusting the introducing velocity of precipitator into the droplet.

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