Preparation and Characterization of Polyvinylidene Fluoride by Irradiating Electron Beam

전자빔 조사를 이용한 Polyvinylidene Fluoride의 제조 및 특성

  • Choi, Yong-Jin (Department of Chemical Engineering, Dong-eui University) ;
  • Kim, Min (Department of Safety & Environmental Engineering, Dong-gug University)
  • 최용진 (동의대학교 화학공학과) ;
  • 김민 (동국대학교 안전환경시스템공학과)
  • Received : 2011.01.14
  • Accepted : 2011.04.26
  • Published : 2011.08.10

Abstract

For the purpose of introducing hydrophilic function to pristine PVDF, pristine PVDF was modified under atmosphere and aqueous vapor by irradiating electron beam (EB). EB dose was varied from 0 to 125 K Gray, respectively. Their changes of chemical composition /structure were observed and evaluated by FT-IR, EDS and DSC. Also, their surface behaviors were evaluated by contact angle. In FT-IR study, it was confirmed that hydroxyl functions were introduced to pristine PVDF. In EDS analysis, mole ratio of F (fluoride) was almost constant (about 33%) in spite of increasing EB dose, meaning that hydroxyl function was introduced via dehydrozenation, not via deflurodination. In DSC study, $T_g$ increased with increasing EB dose, which was reconfirmed that hydroxyl function was introduced via dehydrozenation. $T_m$ increased with increasing EB dose, inferring that the increase in EB dose led to more outbreak of hydroxyl function which led to more enhanced hydrogen bond. In the result of contact angle, pristine PVDF film was $62^{\circ}$ and 125 K Gray-irradiated PVDF film was even $13^{\circ}$. All results showed that pristine PVDF was successfully changed to hydrophilic PVDF.

Acknowledgement

Supported by : 한국연구재단

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