Development, characterization and cytotoxicity of novel silane-modified clay minerals and nanocomposites intended for food packaging
Abstract Layered silicates are largely used to develop polymer nanocomposites with improved physical properties compared to the original polymeric matrix. In this work, the silylation of sodium montmorillonite (Mt) was performed in distilled water using 3-aminopropyltriethoxysilane and vinyltrimethoxysilane, obtaining two different silane modified clay minerals named Clay3 and Clay4, respectively. Clay3 indicated a better profile with a notable increase in the interlayer space compared to Mt. For this reason, Clay3 was selected to scale up its production and to be incorporated in polypropylene (PP) matrix. The PP-Clay3 nanocomposite showed an enhancement in elasticity, a reduction of 15% in the oxygen transmission rate and important antimicrobial effects in comparison to pristine PP. Also, for the first time, cytotoxic effects in human cell lines exposed to Clay3 and Clay4 were evaluated. No cytotoxic damage was observed after Clay3 exposure but an important decrease in cell viability was produced by Clay4. The PP-Clay3 nanocomposite is an attractive alternative for the food packaging industry although further work is needed to get better results in the case of Clay4. Moreover, individual case by case evaluation of clay minerals under different conditions is required in order to obtain the most complete toxicity information. Highlights Two different organoclays were developed from Mt using silanes as modifiers. Better technological results were obtained with the 3-aminopropylthriethoxisilane modified clay mineral. PP-3-aminopropylthriethoxisilane modified clay mineral nanocomposites showed improved mechanical and barrier properties. Microbiological growth has been reduced with PP-3-aminopropylthriethoxisilane modified clay mineral nanocomposites. Vinyltrimethoxysilane modified clay mineral produced a decrease in cell viability in both cell lines tested. Graphical abstract [DISPLAY OMISSION]
유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.
원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.
NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.
- 이 논문과 함께 출판된 논문 + 더보기