Wai Phyu Thin, Jiang Pingping, Shen Yirui, Zhang Pingbo, Gu Qian, Leng Yan
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University Wuxi 214122 China
RSC Adv. 2019 Nov 21;9(65):38119-38136. doi: 10.1039/c9ra05943a. eCollection 2019 Nov 19.
Functionalization of vegetable oils (VOs) including edible, non-edible, and waste cooking oil (WCOs) to epoxides (EVOs) is receiving great attention by many researchers from academia and industry because they are renewable, versatile, sustainable, non-toxic, and eco-friendly, and they can partially or totally replace harmful phthalate plasticizers. The epoxidation of VOs on an industrial scale has already been developed by the homogeneous catalytic system using peracids. Due to the drawbacks of this method, other systems including acidic ion exchange resins, polyoxometalates, and enzymes are becoming alternative catalysts for the epoxidation reaction. We have reviewed all these catalytic systems including their benefits and drawbacks, reaction mechanisms, intensification of each system in different ways as well as the physicochemical properties of VOs and EVOs and new findings in recent years. Finally, the current methods including titrimetric methods as well as ATR-FTIR and H NMR for determination of conversion, epoxidation, and selectivity of epoxidized vegetable oils (EVOs) are also briefly described.
植物油（VOs）的功能化，包括食用植物油、非食用植物油和废食用油（WCOs）转化为环氧化植物油（EVOs），正受到学术界和工业界众多研究人员的高度关注，因为它们可再生、用途广泛、可持续、无毒且环保，并且可以部分或完全替代有害的邻苯二甲酸酯类增塑剂。使用过氧酸的均相催化体系已实现了植物油在工业规模上的环氧化。由于该方法存在缺点，其他体系，包括酸性离子交换树脂、多金属氧酸盐和酶，正成为环氧化反应的替代催化剂。我们综述了所有这些催化体系，包括它们的优缺点、反应机理、以不同方式强化各体系的情况，以及植物油和环氧化植物油的物理化学性质和近年来的新发现。最后，还简要介绍了目前用于测定环氧化植物油（EVOs）的转化率、环氧化程度和选择性的方法，包括滴定法以及衰减全反射傅里叶变换红外光谱法（ATR-FTIR）和核磁共振氢谱法（H NMR）。
