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열압착 온도가 전기방사 Polyacrylonitrile 분리막의 기계적 강도 및 물성치에 미치는 영향
김민철(Minchoel Kim),고태조(Tae Jo Ko),와카스 울 아리핀(Waqas Ul Arifeen),동정(Dong Ting) 한국기계가공학회 2019 한국기계가공학회지 Vol.18 No.4
The mechanical deformation of a battery separator causes internal short-circuiting of the cathode anode, which directly affects the explosion/ignition of batteries. To increase the mechanical properties of the separator fabricated by electro-spinning, use of a thermal pressing method is inevitable. Therefore, this research aims to maximize the mechanical strength of a porous separator by finding the proper thermal press temperatures given to Electro-spun Polyacrylonitrile (PAN) nanofibers. The different thermal press temperatures 25°C, 50°C, 75°C, and 100°C were applied to the electro-spun fiber at 30 MPa pressure for one hour. The higher the temperature, the higher the resultant tensile strength; however, a higher temperature also lowered the strain and porosity. Thus, the membrane thermal pressed at 50°C showed the best mechanical properties and the second highest porosity. Using the data, 50°C was judged as the best thermal pressing temperature in terms of performance.