서지주요정보
가교된 PDMS 막을 이용한 유기 염소계 화합물의 투과증발 특성에 관한 연구 = Pervaporation characteristics of chlorinated organic compounds using crosslinked PDMS membrane
서명 / 저자 가교된 PDMS 막을 이용한 유기 염소계 화합물의 투과증발 특성에 관한 연구 = Pervaporation characteristics of chlorinated organic compounds using crosslinked PDMS membrane / 김용운.
저자명 김용운 ; Kim, Yong-Woon
발행사항 [대전 : 한국과학기술원, 2000].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8011129

소장위치/청구기호

학술문화관(문화관) 보존서고

MCHE 00009

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

초록정보

VOCs (Volatile Organic Compounds)-contaminated water in chemical processes such as painting, solvent degreasing, printing and dry-cleaning causes many environmental problems and affects the health of plants and animals. Pervaporation of many separation technologies offers economical advantages in the removal of trace chlorinated hydrocarbon from aqueous solution. Pervaporation is a membrane process in which a liquid mixture is in contact with the membrane on the feed side at atmospheric pressure and where permeate is removed as a vapor because of a low vapor pressure existing on the permeate side. Among various polymeric membranes, PDMS (polydimethylsiloxane) was used in pervaporation process because this polymer has shown good permeability together with reasonable selectivity. From the pervaporation experiments, the flux of trichloroethylene (TCE) increased linearly with feed composition but the flux of water was slightly increased because of TCE-water coupling. And the separation efficiency of TCE was better than that of PCE. Higher flux was obtained at the lower downstream pressure and higher operating temperature. And flux of TCE was increased rapidly with feed flow rates because of the removal of concentration polarization. The selectivities for each case were shown inversely with flux. In polymeric membrane separation performance depends on glass transition temperature and degree of crystallinity. The effect of crosslinking is similar to that of crystallinity and important in the crosslinked polymer such as PDMS. Therefore, permeation flux and selectivity depend strongly on the crosslinking density. Crosslinking densities of each membrane were measured by sorption experiment of cyclohexane. High crosslinking density means the reduction of solubility and diffusivity for target component. The reduction of diffusivity for each membrane was calculated by sorption experiments of single component and Fujita's free volume theory. Flux and selectivity of trichloroethylene have a tendency to decrease with crosslinking density. Chain immobilization and reduction of diffusivity could explain these results.

서지기타정보

서지기타정보
청구기호 {MCHE 00009
형태사항 x, 77 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Yong-Woon Kim
지도교수의 한글표기 : 홍원희
지도교수의 영문표기 : Won-Hi Hong
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 74-77
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