Polymer(Korea) (폴리머)

The Polymer Society of Korea (한국고분자학회)
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Fabrication of a High Porous Polyethylene Membrane Using BET as a Novel Diluent

새로운 BET 희석제를 이용한 고다공성 폴리에틸렌 분리막 제조

  • Cho, Inhyun (School of Chemical Engineering and Materials Science, Chung-Ang University) ;
  • Lee, Soomi (School of Chemical Engineering and Materials Science, Chung-Ang University) ;
  • Kim, Chang Keun (School of Chemical Engineering and Materials Science, Chung-Ang University)
  • 조인현 (중앙대학교 화학신소재공학부) ;
  • 이수미 (중앙대학교 화학신소재공학부) ;
  • 김창근 (중앙대학교 화학신소재공학부)
  • Received : 2014.03.05
  • Accepted : 2014.03.24
  • Published : 2014.07.25
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Abstract

Polyethylene (PE) membranes having various porosities are used as microfilters and separators in lithium ion batteries. Membranes having a high porosity are required for use as separators in a large scale lithium ion secondary battery. In this study, BET was examined for use as a new nontoxic diluent for the fabrication of highly porous PE membranes by thermally induced phase separation process. It was confirmed that BET can be used as a new diluent for the fabrication of the PE membranes by exploring upper critical solution temperature type phase behavior of PE mixtures with BET. When the porosity of the membrane prepared from the PE/PO mixture was compared with that prepared from PE/BET mixture, the latter was about 1.8 times higher than the former.

다양한 기공도를 갖는 폴리에틸렌 분리막은 리튬이차전지의 격리막과 마이크로필터로 사용되고 있다. 폴리에틸렌 분리막을 대용량 리튬이차전지의 격리막에 응용하기 위해서는 고다공성 분리막의 제조가 요구된다. 본 연구에서는 열유도 상분리 공정으로 고다공성 폴리에틸렌 분리막을 제조하는데 있어, BET가 무독성 희석제로 사용 가능한지 여부를 실험하였다. 폴리에틸렌/BET 혼합물의 UCST-거동을 관찰하여 BET가 폴리에틸렌 다공막 제조용 희석제로 사용 가능함을 확인하였다. 폴리에틸렌/BET 혼합물로부터 제조된 분리막이 같은 조성에서 폴리에틸렌/파라핀 오일로부터 제조된 분리막에 비해 1.8배 높은 기공도를 나타내었다.

Keywords

Acknowledgement

Supported by : 중앙대학교

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