State Key Laboratory of Inorganic Synthesis & Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China.
Jilin Province Product Quality Supervision Test Institute, Changchun 130103, PR China.
Int J Biol Macromol. 2022 Oct 1;218:891-899. doi: 10.1016/j.ijbiomac.2022.07.190. Epub 2022 Jul 27.
Driven by the global carbon neutrality action, biomass-derived functional materials have been applied in many fields to alleviate the pressure brought by the depletion of fossil energy. However, due to the complex structure, lignin faces many difficulties in its high-value utilization. The second largest biomass in the world has become the largest "natural waste". In this paper, the lignin-based biochar-silica (LB-S) hybrid nanoparticles were prepared via a combination of two-step acid precipitation and carbonization using lignin black liquor extracted from xylose residue and sodium silicate as raw materials. The effects of carbonization temperature and lignin-based biochar (LB) content on the reinforcing properties of LB-S were studied. The results show that the particle size, specific surface area, pore characteristics, and surface polarity of LB-S all affect the mechanical properties of the final vulcanizates. The reinforcement performance of the best sample (LB-S) with "high structure" characteristics can be comparable to that of commercial carbon black (CB) N550. This study shows that LB-S hybrid nanoparticles with economic benefits possess the potential to completely replace commercial CB, which can turn lignin waste into treasure and promote the green development of traditional rubber industry in the context of carbon neutrality.
在全球碳中和行动的推动下，生物质衍生功能材料已被应用于许多领域，以缓解化石能源枯竭带来的压力。然而，由于其复杂的结构，木质素在高值化利用上面临诸多困难。世界上第二大生物质资源已成为最大的“天然废弃物”。本文以木糖渣提取的木质素黑液和硅酸钠为原料，采用两步酸沉淀法和碳化法相结合，制备了基于木质素的生物炭-硅（LB-S）杂化纳米粒子。研究了碳化温度和基于木质素的生物炭（LB）含量对 LB-S 增强性能的影响。结果表明，LB-S 的粒径、比表面积、孔特征和表面极性均影响最终硫化胶的力学性能。具有“高结构”特征的最佳样品（LB-S）的增强性能可与商业炭黑（CB）N550 相媲美。本研究表明，具有经济效益的 LB-S 杂化纳米粒子具有完全替代商业 CB 的潜力，可在碳中和背景下变木质素废弃物为宝，促进传统橡胶工业的绿色发展。
