Self-assembled lignin nanospheres with solid and hollow tunable structures

Self-assembled lignin nanospheres with solid and hollow tunable structures
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具有实心和空心可调结构的自组装木质素纳米球

DOI:
10.1016/j.indcrop.2019.112063
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发表时间:
2020-02
影响因子:
5.9
通讯作者:
Wu Yiqiang
Wu Yiqiang
中科院分区:
农林科学1区
文献类型:
--
作者:
Xiong Fuquan;Wang Hang;Xu Han;Qing Yan;Wu Zhiping;Wu Yiqiang

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具有可定制结构的纳米微球的制备在材料应用中引起了广泛的关注。在此,我们发现,食品添加剂,二丁基羟基甲苯(BHT),能够调整木质素纳米球的实心和空心结构。当BHT在四氢呋喃(THF)中的浓度大于0.3mg/mL时,由于BHT分子引起的THF和水之间的相分离,所获得的木质素纳米球显示出中空结构,而在不添加BHT的情况下获得的木质素纳米球显示出固体结构。BHT和含有高含量羧基的木质素分子不参与纳米球的形成。水搅拌和滴加速度的增加减小了纳米球的直径,而木质素和BHT的初始浓度的增加导致纳米球直径的增加。通过调节BHT和木质素的浓度,可以控制壳壁厚度和单孔大小。该研究为制备具有可调结构的木质素纳米球提供了新的思路。
The fabrication of nanospheres with tailored structure has attracted much attention in material applications. Herein we found that the food additive, butylated hydroxytoluene (BHT), was able to adjust the solid and hollow structure of lignin nanospheres. At BHT concentrations greater than 0.3 mg/mL in tetrahydrofuran (THF), the obtained lignin nanospheres displayed a hollow structure due to phase separation between THF and water caused by BHT molecules, while the lignin nanospheres obtained without adding BHT exhibited a solid structure. BHT and lignin molecules containing a high content of the carboxy group did not participate in the formation of the nanospheres. Increases in the water stirring and dropping speeds reduced the diameter of the nanospheres, while increasing the initial concentration of lignin and BHT resulted in an increase in nanospheres diameters. Moreover, the shell wall thickness and single hole size could be controlled by employing the concentration of BHT and lignin. This work provides novel insights into the preparation of lignin nanospheres with tunable structures.
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