摘要
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,并采用分光光度法研究壁芯比对微胶囊释放行为的影响,进而研究壁芯比对微胶囊缓释动力学的影响。结果表明成功制备了规整球形的异噻唑啉酮微胶囊;微胶囊粒径分布较宽,主要分布在91~960 nm,268~610 nm的微胶囊约占84.1%,平均粒径为460.9 nm;随着壁芯比的减小,扩散速率常数增大,达到平衡时所用时间缩短,微胶囊缓释性变差。
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.
机构地区
海军勤务学院
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2021年第2期49-53,60,共6页
Polymer Materials Science & Engineering
基金
海军装备军内科研项目。
关键词
水性聚氨酯
异噻唑啉酮衍生物
微胶囊
释放行为
waterborne polyurethane
Sea-nine 211
microcapsules
sustained release behavior
