Lignin-Based Nanocapsules with Tunable Size for Cu(II) Ion Absorption

文献类型： 外文期刊

第一作者： Li, Lixia

作者： Li, Lixia;Li, Lixia;Tong, Zhaohui;Meng, Shanyu;Li, Tiantian;Wang, Hui;Wang, Hui;Chen, Yongsheng

作者机构：

关键词： lignosulfonate; miniemulsion; polyethyleneimine; copper ions; removal

期刊名称：ACS APPLIED NANO MATERIALS （ 影响因子：5.097； 五年影响因子：5.1 ）

ISSN： 2574-0970

年卷期： 2020 年 3 卷 11 期

页码：

收录情况： SCI

摘要： Functional nanocapsules from low-cost and renewable materials are an urgent need for environmental applications. Herein, lignin-based nanocapsules with tunable size are synthesized using an interfacial miniemulsion polymerization method under mild conditions. To form the nanoabsorbent with a hollow structure, the epoxy-amine addition reaction between amphiphilic lignin-based epoxy and polyethyleneimine is designed to occur at the cyclohexane/water interface. Then, cyclohexane as the sacrificed nanocore template is removed to form a hollow structure. Both FTIR and H-1 NMR spectra indicate the success of grafting amine groups and epoxy groups on lignosulfonate. The synthesized lignin-based nanocapsules have particle sizes ranging from 100 to 400 nm and tunable interior pores. They also own a much higher BET surface area (36.445 m(2)/g) than pure lignosulfonate and epoxy-modified lignosulfonate for improved copper ion absorption. The absorption kinetics and isotherm studies combined with the XPS spectra indicate that the nanocapsules adsorb copper ions by monolayer chemisorption mechanism. The lignin-based nanocapsules shed light on the design of biowaste-based nanocapsules with controllable size for metal absorption, e.g., heavy metal remediation and a metal-based catalyst.

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