具有油相隔离层的微流控法可控制备中空微纤维
作者:
作者单位:

四川大学化学工程学院

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金资助项目(21991101,92034303)


Controllable Preparation of Hollow Microfibers by Microfluidic with Oil Phase as Isolatoin Layer
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    利用具有油相隔离层的微流控法连续可控制备了海藻酸钙(CaAlg)中空微纤维。内外相流体通过微流控装置出口挤出,通过调整装置出口与凝固浴液面距离、外相流速和收集速度在油相隔离层中形成同轴射流,射流突破油水相界面进入凝固浴后交联形成CaAlg中空纤维。实验中,微流控装置出口与凝固浴液面的最优距离为2 mm,外相流速越大,收集速度越小,射流越稳定。在形成稳定射流的条件范围内,制备得到了结构均一的CaAlg中空纤维,通过调整内外相流速和收集速度可以精确调控中空纤维的直径。根据流动连续性方程建立了简单的分析模型用于中空纤维直径的预测,该模型给出了内相流速、外相流速、收集速度与纤维直径的显式关系,并根据实验数据验证了模型预测的准确性。

    Abstract:

    Calcium alginate (CaAlg) hollow microfibers were continuously and controllably prepared by microfluidic with oil phase as isolation layer. The inner and outer phase fluids were extruded through the outlet of the microfluidic device, and the coaxial jet was formed in the oil phase isolation layer by adjusting the distance between the outlet of the device and the solidification bath surface, the flow rate of the outer phase and the collection speed. The CaAlg hollow microfibers were formed after the jet templates cross-linked in the coagulation bath. In the experiment, the optimal distance between the outlet of the microfluidic device and the surface of the coagulation bath is 2 mm. The larger the flow rate of the outer phase and the smaller the collection speed, the more stable the jet. Within the range of conditions for the formation of a stable jet, CaAlg hollow microfibers with uniform structures were prepared. The diameter of the hollow microfiber can be precisely controlled by adjusting the collection speed and flow rate of the inner and outer phases. A simple analysis model was established according to the flow continuity equation to predict the diameter of hollow fibers. The model gives an explicit relationship between the inner phase flow rate, outer phase flow rate and collection speed with the microfiber diameter. The accuracy of the model""s prediction was verified based on the experimental data.

    参考文献
    相似文献
    引证文献
引用本文
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2021-11-16
  • 最后修改日期:2021-11-29
  • 录用日期:2022-03-25
  • 在线发布日期: 2022-04-22
  • 出版日期:
您是第位访问者
编辑出版:《高分子材料科学与工程》编辑部
地址:四川省成都市一环路南一段24号 四川大学高分子研究所
电话:028-8540 1653  E-mail:gfzclbjb@163.net; gfzclbjb@vip.sina.com
高分子材料科学与工程 ® 2022 版权所有
技术支持:北京勤云科技发展有限公司