Department of Chemical Engineering, Waterloo Institute for Nanotechnology , University of Waterloo , 200 University Avenue, Waterloo , Ontario N2L 3G1 , Canada.
College of Chemistry and Chemical Engineering , Central South University , Changsha , Hunan 410083 , P. R. China.
Langmuir. 2018 Oct 30;34(43):12897-12905. doi: 10.1021/acs.langmuir.8b02437. Epub 2018 Oct 18.
Sulfated cellulose nanocrystals (CNC) with high surface charge density are inadequate for stabilizing oil-water emulsions, which limits their applications as interfacial stabilizers. We performed end-group modification by introducing hydrophobic chains (polystyrene) to CNC. Results showed that the modified CNC are more effective in emulsifying toluene and hexadecane than pristine CNC. Various parameters were investigated, such as concentration of particles, electrolytes, and polarity of solvents on the characteristics of the emulsions. This study provides strategies for the modification of cellulose nanocrystals to yield amphiphilic nanoparticles that enhance the stability of emulsions. Such systems, bearing biocompatible and environmentally friendly characteristics, are attractive for use in a wide range of industries spanning food, biomedicine, pharmaceuticals, cosmetics, and petrochemicals.
带有高表面电荷密度的硫酸化纤维素纳米晶体（CNC）对于稳定油-水乳液是不够的，这限制了它们作为界面稳定剂的应用。我们通过引入疏水性链（聚苯乙烯）对 CNC 进行端基改性。结果表明，改性 CNC 比原始 CNC 更有效地乳化甲苯和十六烷。研究了各种参数，如颗粒浓度、电解质和溶剂极性对乳液特性的影响。这项研究为纤维素纳米晶体的改性提供了策略，以得到两亲性纳米颗粒，从而增强乳液的稳定性。这些具有生物相容性和环境友好特性的体系在食品、生物医学、制药、化妆品和石油化工等广泛的行业中具有吸引力。
