果胶
超临界干燥
纳米复合材料
超临界流体
化学工程
气凝胶
材料科学
溶解
生物高聚物
热导率
纳米颗粒
化学
聚合物
复合材料
有机化学
纳米技术
工程类
生物化学
作者
Aleksandra Nešić,Milan Gordić,Slađana Davidović,Željko Radovanović,Jovan M. Nedeljković,Ирина Смирнова,Pavel Gurikov
标识
DOI:10.1016/j.carbpol.2018.04.076
摘要
Environmental-friendly pectin-TiO2 nanocomposite aerogels were prepared via sol-gel process and subsequent drying under supercritical conditions. The first step includes dissolution of pectin in water, addition of proper amount of TiO2 colloid and crosslinking reaction induced in the presence of tert-butanol and zinc ions. Then, the gels are subjected to the solvent exchange and supercritical CO2 drying. The influence of TiO2 nanoparticles on the textural, mechanical, thermal and antibacterial properties of aerogels was investigated. Results indicate that in the presence of TiO2 nanoparticles (NPs) mechanical, thermal and antimicrobial properties of pectin-based aerogels are improved in comparison to the control pectin aerogels. It should be emphasized that the thermal conductivity of pectin-based aerogels (0.022–0.025 W m−1 K−1) is lower than the thermal conductivity of air. Generally, the results propose that the pectin-TiO2 nanocomposite aerogels, as bio-based material, might have potential application for the storage of temperature-sensitive food.
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