ENHANCEMENT OF DEPOSITION OF NANOPARTICLES ON CELLULOSE FIBERS BY SURFACE CHARGE MODIFICATION
Deposition of nanoparticles on substrates by electrostatic attraction forces is one of the major approaches to the fabrication of nanomaterial composites. The adsorption amount is limited and uniformity is poor for adsorbed nanoparticles layer on natural fibers due to the deficiency of surface charge. In this research we attempted to modify natural cellulose fibers with higher charge density of charged negative or positive groups. Three types of groups (carboxylic, sulfonate, and quaternary ammonium groups) were grafted to the cellulose surface by epoxy reaction and the resulting cellulose surface was rendered with negative or positive charge when in aqueous media. Through the surface charge modification, the deposition amount and uniformity of coated layer of SiO2 nanoparticles stabilized with negatively or positively charged polymers were found to be improved significantly. Composites of nanoparticles and cellulose fibers were characterized by FESEM technique.
cellulose surface charge nanoparticles
Song Junlong Wang Chaoxia Juan P.Hinestroza
Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology,, Nanjing Forestry University,Na Key Laboratory of Science & Technology of Eco-Textile, Ministry of Education, Jiangnan University, W Key Laboratory of Science & Technology of Eco-Textile, Ministry of Education, Jiangnan University, W
国际会议
广州
英文
1495-1498
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）