[논문]고분자/층상실리케이트 나노복합체의 분리막에의 응용

박지순; 임지원; 구형서; 김인호; 남상용

고분자/층상실리케이트 나노복합체의 분리막에의 응용
Membrane Application of Polymer/Layered Silicate Nanocomposite 원문보기

멤브레인 = Membrane Journal, v.15 no.4, 2005년, pp.255 - 271

박지순 (경상대학교 고분자공학과) , 임지원 (한남대학교 화학공학과) , 구형서 (충남대학교 공과대학 화학공학과) , 김인호 (충남대학교 공과대학 화학공학과) , 남상용 (경상대학교 고분자공학과)

초록
AI-Helper

고분자/층상실리케이트 나노복합체(polymer/layeres silicate nanocomposite, PLSNs) 필름은 보통 내부층을 나트륨과 같은 양이온을 이용한 이온교환을 통해 유기화된 clay로 만든 재료의 새로운 형태이다. 이것은 중합법, 용액법, 그리고 용융법과 같은 다양한 방법으로 제조할 수 있으며, 열경화성, 열가소성이나 탄성고분자와 같은 넓은 범위의 고분자를 기질로 사용할 수 있다. PLSNs 필름은 고분자 사슬이 일정한 간격으로 쌓여있는 실리케이트에 삽입하여 간격을 넓히는 삽입형과 각각의 실리케이트 층이 고분자 기질에 불균일하게 분산되어 형성하는 박리형 두 가지 형태의 구조를 얻을 수 있다. 이러한 새로운 분야의 재료는 보통 5 wt$\%$ 이하의 소량의 clay 함유만으로도 향상된 기계적, 열적 특성을 얻을 수 있다. 그리고 clay의 함유량이 증가할수록 기체 투과경로인 tortuosity가 증가하여 기체 투과도가 감소한다.

Abstract ▼ AI-Helper

polymer/layered silicate nanocomposite (PLSNs) is new type of materials, based on clays usually rendered hydrophobic through ionic exchange of the sodium interlayer cation with an onium cation. It could be prepared via various synthetic routes comprising exfoliation adsorption, in situ intercalative polymerization and melt intercalation. The whole range of polymer is used, i.e. thermoplastics, thermosets and elastomers as a matrix. Two types of structure may be obtained, namely intercalated nanocomposites where the polymer chains are sandwiched in between silicate layers and exfolicate nanocomposites where the separated, individual silicate layers are more or less uniformly dispersed in the polymer matrix. This new family of materials exhibits enhanced properties at very low filer level, usually inferior to 5wt$\%$, such as increased mechanical properties, increase in thermal stability and gas barrier properties and good flame retardancy. Gas permeability through the PLSNs films decreased due to increased tortuosity made by intercalation or exfoliation of clay in polymer.

주제어

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