化工学报Issue(8)：3255-3261,7.DOI:10.11949/j.issn.0438-1157.20150636
木质素基二氧化硅复合纳米颗粒的制备及在高密度聚乙烯中的应用
Preparation of lignin-based silica composite nanoparticles and its application in HDPE
摘要
Abstract
According to the presence situation that lignin-based SiO2composite nanoparticles are difficult for industry application, owing to serious aggregation and low lignin capacity, phosphatized alkali lignin (PAL) was prepared through phosphorylation reaction using alkali lignin (AL) from the alkaline pulping spent liquor of poplar as main material. The lignin/silica composite nanoparticles (L-SiO2) was combined from 1 part nanosilica with 1.2 part (by mass) synthesized PAL by acidulation co-precipitation method. Subsequently, L-SiO2 was added into HDPE to prepare L-SiO2/HDPE composites. Results of FT-IR, XPS, TEM, TG and static contact angle showed that PAL was bonded to silica through hydrogen bonds. L-SiO2 accounted for 47% (mass) LQA. Compared to crude silica, the particle size of L-SiO2 increased from 25 to 40 nm and the agglomeration of particle decreased noticeably. More importantly, the surface of L-SiO2 became more hydrophobic, which made them disperse better in HDPE. The tensile strength and elongation at break of prepared L-SiO2/HDPE composites were 48.68% and 73.57%, respectively, higher than those of AL/HDPE.关键词
碱木质素/二氧化硅/磷酸化碱木质素/纳米材料/高密度聚乙烯Key words
alkali lignin/silica/phosphatized alkali lignin/nanomaterials/HDPE分类
化学化工引用本文复制引用
钟锐生,杨东杰,熊文龙,郭闻源,邱学青..木质素基二氧化硅复合纳米颗粒的制备及在高密度聚乙烯中的应用[J].化工学报,2015,(8):3255-3261,7.基金项目
国家国际科技合作专项项目（2013DFA41670）；国家自然科学基金项目（21436004）。 （）
