植物油基丙烯酸酯单体对水性环氧树脂的高效细乳液聚合,ACS Sustainable Chemistry & Engineering

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植物油基丙烯酸酯单体对水性环氧树脂的高效细乳液聚合
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2022-09-28 , DOI: 10.1021/acssuschemeng.2c02403
Wei Liu ₁ , Mei Wu ₁ , Chuqing Ma ₁ , Cheng Liu ₁ , Xiaoying Zhang ₁ , Zhong Wang ₁ , Zhongkai Wang ₁

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通过乳液聚合从生物质中合成水性聚合物越来越受到人们的关注。植物油是最丰富的可再生资源之一。然而，在大多数情况下，由于存在疏水性和不饱和脂肪酸，植物油衍生的单体很难通过乳液聚合进行聚合。在此，有效地合成了植物油-丙烯酸酯环氧单体。采用细乳液聚合制备植物油-丙烯酸酯环氧胶乳。成功获得并表征了单体转化率超过 99% 的含有环氧基团的稳定胶乳。通过利用胶乳中存在的环氧基团，获得了优异的粘合性能（1.5 MPa 剪切强度）。这些植物油-丙烯酸酯环氧单体还与醋酸乙烯酯 (VAc) 共聚以改性商业 PVAc 胶乳。与PVAc胶乳相比，获得了具有更好的粘合性能、耐水性和拉伸强度的水性胶乳。此外，以柠檬酸为交联剂制备了全生物基水性环氧树脂。现有的动态β-羟基酯化学网络具有作为可重构和可回收涂层的巨大潜力。

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Efficient Miniemulsion Polymerization of Plant Oil-Based Acrylate Monomer toward Waterborne Epoxy Resins

Synthesis of waterborne polymers from biomass via emulsion polymerization has gained more and more interest. Plant oils are one of the most abundant renewable resources. However, in most cases, plant oil-derived monomers are difficult to polymerize through emulsion polymerization due to the existence of hydrophobic and unsaturated fatty acids. Herein, plant oil-acrylate epoxy monomers were synthesized efficiently. Miniemulsion polymerization was applied to obtain plant oil-acrylate epoxy latexes. Stable latexes containing epoxy moieties with monomer conversion rate exceeding 99% were successfully obtained and characterized. By taking advantages of the epoxy groups presented in the latexes, excellent adhesion properties were obtained (1.5 MPa shear strength). These plant oil-acrylate epoxy monomers were also copolymerized with vinyl acetate (VAc) to modify the commercial PVAc latexes. Waterborne latexes with better adhesion properties, water resistance, and tensile strength were obtained, compared with PVAc latex. Furthermore, the fully biobased waterborne epoxy resin was prepared by using citric acid as the cross-linking agent. The existing dynamic β-hydroxyl ester chemical networks enable great potential as a reconfigurable and recyclable coating.

更新日期：2022-09-28

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