异噻唑啉酮微胶囊的制备表征及释放行为

以二异氰酸酯(TDI)、聚乙二醇4000(PEG)、二羟甲基丙酸(DMPA)和三乙胺(TEA)为原料,制备可水乳化的聚氨酯(WPU).以合成的WPU为囊壁、以异噻唑啉酮衍生物(Sea-nine 211)为囊芯,通过乳化自组装得到防污剂Sea-nine 211微胶囊,用红外光谱、粒径分布和扫描电镜对胶囊进行表征,并采用分...

Preparation,Characterization and Sustained Release Behavior of Isothiazolinone Microcapsules

Waterborne polyurethanes(WPUs)as capsule wall were designed and synthesized with diisocyanate,polyethylene glycol,dimethylpropionic acid and triethylamine.Isothiazolinone microcapsules were prepared by self-emulsifying method.FT-IR,laser particle size analyzer and SEM were used to characterize the isothiazolinone microcapsules.The effects of wall/core mass ratio on the release behavior of microcapsules were studied by UV-vis spectrophotometry and the sustained release kinetics of microcapsules were further studied.The SEM images and particle diameter measurements show that the microcapsules are regularly global particles,the particle sizes are mainly between 91~960 nm,microcapsules between 268~610 nm account for about 84.1%and the average particle size is 460.9 nm;the curve-fitting results show that the release of isothiazolinone in the microcapsules basically accords with the derived diffusion equation,and the diffusion rate constant increases as the wall/core mass ratio reduces.