木质素
微乳液
纳米凝胶
材料科学
丙烯酸
化学工程
水溶液
高分子化学
纳米颗粒
动态光散射
聚合物
有机化学
化学
药物输送
纳米技术
聚合
单体
复合材料
工程类
作者
Doungporn Yiamsawas,Wiyong Kangwansupamonkon,Suda Kiatkamjornwong
标识
DOI:10.1016/j.eurpolymj.2020.110241
摘要
Bio-based nanoparticles are promising materials in agriculture because they enable a controlled release of agrochemicals to plants. The release can be more specific by engineering nanoparticles with stimuli-responsive properties. Herein, we reported lignin-based nanogels which can release payloads in alkaline conditions. Lignin methacrylate was emulsified in miniemulsion droplets and graft copolymerized with acrylic acid to form core-shell nanogels. The successful incorporation of acrylic acid and lignin units in the nanogels was confirmed by FT-IR, H-NMR and XPS spectroscopies. TEM and dynamic light scattering analysis demonstrated that the nanogels were spherical and uniformly dispersed in the aqueous phase. AFM nanoindentation and thermal analysis indicated that the nanogels were mechanically and thermally durable. Lignin-based nanogels exhibited a pH-responsive swelling at high amounts of acrylic acid. Various hydrophobic payloads were encapsulated in high yield and could be preferentially released in alkaline conditions. Lignin-based nanogels are therefore the potential nanocarrier for the controlled release of agrochemicals such as pesticides or fungicides.
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