Fabcrication and Control of PC/PLA Composite Porous Membrane by Quenching Method

Li-qing QIU; Hang-zhong LIU; Jin-yun ZHAO; Xin-huai GONG

doi:10.14028/j.cnki.1003-3726.2021.09.006

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Fabcrication and Control of PC/PLA Composite Porous Membrane by Quenching Method

更新时间：2022-08-30

- Fabcrication and Control of PC/PLA Composite Porous Membrane by Quenching Method
- Polymer Bulletin Vol. 34, Issue 9, Pages: 54-59(2021)
- 作者机构：
  
  武夷学院生态与资源工程学院,福建省竹材工程技术研究中心,福建省生态产业绿色技术重点实验室,武夷山 354300
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2021.09.006
  CLC：
- Published：20 September 2021，
  
  Received：19 May 2020，
  
  Revised：25 April 2021，
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Li-qing QIU, Hang-zhong LIU, Jin-yun ZHAO, Xin-huai GONG. Fabcrication and Control of PC/PLA Composite Porous Membrane by Quenching Method. [J]. Polymer Bulletin 34(9):54-59(2021)
DOI：

Li-qing QIU, Hang-zhong LIU, Jin-yun ZHAO, Xin-huai GONG. Fabcrication and Control of PC/PLA Composite Porous Membrane by Quenching Method. [J]. Polymer Bulletin 34(9):54-59(2021) DOI： 10.14028/j.cnki.1003-3726.2021.09.006.

摘要

以聚碳酸酯(PC)和聚乳酸(PLA)为成膜的双组分原料

六氟异丙醇(HFIP)为复合聚合物的共溶剂

甲醇为非溶剂

利用淬火法成功制备了PC/PLA复合多孔膜材料。研究了HFIP浓度、淬火时间、淬火温度和PC/PLA质量配比对所获得的多孔膜形貌结构上的影响

并解释了可能的形成机理。最佳的成膜条件为6g/mL的HFIP浓度、2h的淬火时间、0℃的淬火温度和1/1的PC/PLA质量配比。实验结果表明:非溶剂作用下的淬火相分离和溶剂的先后挥发

分别对应液-固和液-液两分相过程

直接受溶液粘度和表面张力控制。适宜的实验条件下

得到孔径分布均匀和贯通性良好的分层多孔结构;其它条件下或是得到大尺寸、无规整的断孔

或是单层、不均匀的孔结构

亦或是片层、仅有少数孤立小孔的致密结构。

Abstract

Polycarbonate (PC)/Polylactic acid (PLA) composite porous membrane structure of double components PC and PLA were prepared by quenching method under Hexafluoro-isopropanol(HFIP) as co-solvent and methanol as nonsolvent. The effects of factors

such as HFIP concentration

quenching time

quenching temperature and PC/PLA mass ratio

on the morphology and structure of the porous membrane were investigated. The optimum conditions were: 6g/mL HFIP concentration

2h quenching time

0℃ quenching temperature and 1/1 PC/PLA mass ratio. A possible mechanism was proposed. The results show that: the quenching phase separation under non-solvent and the pore formation rate of solvent evaporation successively correspond to the liquid-solid and liquid-liquid two-phase processes respectively

which are directly controlled by solution viscosity and surface tension. Under the suitable experimental conditions

the layered porous structure with uniform pore size distribution and good penetration are obtained. Whereas

Other conditions can be a large size and irregular hole broken structure

or a single layer and uneven hole structure

or be lamellar and only a few isolated holes dense structure.

关键词

聚碳酸酯聚乳酸多孔膜淬火法

Keywords

PolycarbonatePolylactic acidPorous membraneQuenching

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