College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30, Puzhu South Road, Nanjing 211816, China.
National Engineering Research Center for Biotechnology, Nanjing Tech University, No. 30, Puzhu South Road, Nanjing 211816, China.
Int J Biol Macromol. 2023 Apr 1;233:123547. doi: 10.1016/j.ijbiomac.2023.123547. Epub 2023 Feb 4.
Lignin-based hybrid fillers are of increasing importance with regards to the valorization of low-value biomass and the requirement of sustainability in rubber industry, however, a facile lignin modification approach tuning the supramolecular interactions to favor the assembly of the hybrids is in demand. This study aimed to design a lignin/SiO nano-hybrid via an in-situ assembly of diethylamine grafted lignin (DL) and SiO, and investigate its reinforcing effect on natural rubber (NR). DL was prepared through Mannich modification of lignin, and the grafted diethylamine can be clearly identified by FTIR, NMR and elemental analysis. The resultant hybrid (DLSi) displays as homogeneous nanospheres with well integrated DL and SiO components as shown in the TEM images, and the hybrid (DLSi1) prepared with weight ratio of DL/SiO = 1/2 shows a minimum particle size of 101.8 nm and significantly reduced polarity. Compared to the reference composite filled only with carbon black (CB), NR composites filled with DLSi/CB of 10/40 phr shows comparable mechanical properties and reduced rolling resistance, which is due to the low particle size, homogenous dispersion and strong rubber-filler interfacial affinity. Such remarkable performance suggests that the DLSi hybrid can be a promising versatile biobased filler for the application in gasoline-saving "green" tires.
木质素基混合填料对于低价值生物质的增值利用和橡胶工业的可持续性要求变得越来越重要，然而，需要一种简便的木质素修饰方法来调节超分子相互作用，以有利于混合体的组装。本研究旨在通过二乙胺接枝木质素（DL）和 SiO 的原位组装设计一种木质素/SiO 纳米杂化材料，并研究其对天然橡胶（NR）的增强作用。DL 通过木质素的曼尼希改性制备，接枝的二乙胺可以通过 FTIR、NMR 和元素分析清楚地识别。所得的杂化物（DLSi）显示出均匀的纳米球形态，DL 和 SiO 成分结合良好，如 TEM 图像所示，且 DL/SiO 的重量比为 1/2 时制备的杂化物（DLSi1）显示出最小的粒径为 101.8nm，极性显著降低。与仅填充炭黑（CB）的对照复合材料相比，填充有 DLSi/CB（10/40phr）的 NR 复合材料表现出相当的力学性能和较低的滚动阻力，这是由于其粒径小、分散均匀和与橡胶-填料界面的强亲和力。这种显著的性能表明，DLSi 杂化物可以成为一种有前途的多功能生物基填料，用于节油“绿色”轮胎的应用。
