单 位：
深圳市和顺堂医药有限公司;天津科技大学轻工科学与工程学院;浙江金昌特种纸股份有限公司
关键词：
木质素;纳米粒子;复合纸;抗菌性能;机械性能
摘 要：
近年来,木质素纳米粒子的应用成为研究热点。以硫酸盐木质素为原料,首先制备木质素乙醇溶液,在溶液中加入不同质量浓度的FeCl_3溶液(0.01～1.00 mg/mL),搅拌一定时间充分络合后再加入去离子水,将溶液透析3 d后得到含铁木质素纳米颗粒(Fe-LNPs),同时通过自组装的方法制备纯水木质素纳米粒子(p-LNPs)。结果表明:加入FeCl_3溶液后,Fe~(3+)与木质素上的羟基羧基络合,形成稳定的纳米体系,同时也成功制备了纯水木质素纳米粒子(p-LNPs)。对含铁质量浓度不同的4种纳米粒子进行粒径分析,结果表明质量分数为1.00%的Fe-LNPs的粒径最小,为83.8 nm。采用漂白针叶木浆进行制浆抄片试验得到针叶木漂白纸,而后用含铁质量浓度不同的4种纳米粒子与纸张复合,得到纳米粒子纸复合材料。木质素纳米粒子具有大量羟基,可以与纸张表面纤维以氢键形式结合从而完成木质素纳米粒子的附着。对木质素纳米粒子复合纸进行机械性能测试,测得质量分数为1.00%的含铁纳米复合纸的抗张性能最好,利用金黄色葡萄球菌(Staphylococcus aureus)和大肠杆菌(Escherichia coli)对其进行抗菌试验,表现出较好的抑菌性能。
译 名：
Preparation and properties of Fe/lignin nanoparticle composite paper
作 者：
LI Ying;TONG Shuhua;LI Ruifang;DAI Lin;SI Chuanling;College of Light Industry and Engineering, Tianjin University of Science and Technology;Zhejiang Jinchang Specialty Paper Co.Ltd.;Shenzhen Wellsoon Pharmaceutical Co.Ltd.;
关键词：
lignin;;nanoparticles;;composite paper;;antibacterial properties;;mechanical property
摘 要：
With the increasing prominence of resource and environment problems, the high value-added utilization of lignin has become a hot topic. Lignin is a kind of natural aromatic polymer compound, which can be used in many fields such as antibacterial and ultraviolet resistance. The polydispersity of lignin determines that lignin must be treated before being used. The preparation of lignin nanoparticles has also become a hot topic in the field of high value utilization of lignin. First of all, the lignin should be purified. The lignin was dissolved in ethanol, and the upper clear night was dried in the rotary evaporator after centrifugation. After all, the ethanol lignin powder was obtained, which was used to prepare spherical lignin nanoparticles(LNPs) with a self-assembly method by adding water to the ethanol. In addition, Fe-lignin nanoparticles(Fe-LNPs) were complexed by adding different concentrations of FeCl_3 solution(from 0.01 to 1.00 mg/mL) to the alkali lignin/ethanol solution. Fe~(3+) can be complexed with hydroxyl groups to produce ion coordination bonds between Fe and O to form Fe-lignin nanoparticles(Fe-LNPs). Free hydroxyl radicals are produced as the Fe-LNPs form, which can destroy the biological structure of bacteria. The results of SEM, FT-IR and EDS, and the analysis of lignin nanoparticles showed that the preparation of iron-containing lignin nanoparticles was successful. On the other hand, lignin nanoparticle spheres(p-LNPs) were formed by self-assembly method. The particle size of 1.00% Fe-LNPs was the smallest according to the particle size analysis method of lignin nanoparticles, which was 83.8 nm. Bleached coniferous wood pulp was used as raw material to make paper with a beating degree of 25 °SR and a quantification of 80 g/m~2. Lignin nanoparticles were composited with paper to obtain nano-particle paper composites in different dilution ratios. The lignin nanoparticles were successfully attached to both the surface and the cross section, according to the scanning electron microscopy images of the nanoparticle composite paper. The results of physical properties of lignin nanoparticle composite paper showed that the tensile strength of 1.00% nanoparticle composite paper was the best. The 1.00% nanoparticles had a smaller particle size, leading to the results that the damage to the hydrogen bonds between the fibers was smaller compared to that attached to the paper fibers. As for antibacterial experiments, all lignin nanoparticle composite paper showed similar antibacterial effects against Staphylococcus aureus and Escherichia coli, causing the cells to rupture and stick together.
