Dept. of Chemical Technology, University of Calcutta, India.
Dept. of Chemical Technology, University of Calcutta, India.
Carbohydr Polym. 2017 Feb 10;157:1076-1084. doi: 10.1016/j.carbpol.2016.10.075. Epub 2016 Oct 25.
The esterification of furfuryl alcohol (FA) and castor oil fatty acid (COFA) at 3:1 molar ratio, by immobilized Candida antarctica Lipase B (NS 435 from Novozyme) in a solvent free system gave a maximum yield of 88.64% (%w/w) at 5h. Performance of the FA-COFA ester plasticized Ethyl Cellulose (EC) films were evaluated by surface morphologies, XRD analysis, mechanical properties,thermal properties, water vapor permeability and migration stability test. It was an effective plasticizer with better mechanical properties and thermal stability at the increasing concentration of FA-COFA ester (15-25%) containing EC film, than the traditional plasticizer, i.e; dibutyl phthalate (DBP) in producing good quality films. Chemical structure and the intermolecular interactions between FA-COFA ester and ethyl cellulose chains were the causative agents of these outstanding performances. Therefore, this FA-COFA ester, with significant plasticizing property, at a certain concentration, can be a substitute of DBP.
在无溶剂体系中，以摩尔比为 3:1 的比例，用固定化南极假丝酵母脂肪酶 B（Novozyme 的 NS 435）对糠醇（FA）和蓖麻油脂肪酸（COFA）进行酯化反应，在 5 小时内得到了 88.64%（%w/w）的最大产率。通过表面形貌、XRD 分析、机械性能、热性能、水蒸气渗透性和迁移稳定性测试，评估了 FA-COFA 酯增塑的乙基纤维素（EC）薄膜的性能。与传统增塑剂邻苯二甲酸二丁酯（DBP）相比，在含有 FA-COFA 酯（15-25%）的 EC 薄膜中，FA-COFA 酯是一种有效的增塑剂，具有更好的机械性能和热稳定性，能够生产出高质量的薄膜。FA-COFA 酯与乙基纤维素链之间的化学结构和分子间相互作用是这些优异性能的原因。因此，在一定浓度下，具有显著增塑性能的 FA-COFA 酯可以替代 DBP。
