黏附性聚多巴胺@己脒定二羟乙基磺酸盐微胶囊的制备及其性能研究
Preparation and properties of adhesive polydopamine@hexamidine diisethionate nanocapsules
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摘要: 为提高去屑剂己脒定二羟乙基磺酸盐(HD)在湿润环境下的黏附性能,以W1/O/W2双重乳液为模板,合成具有黏附性的聚多巴胺@己脒定二羟乙基磺酸盐微胶囊(PDA@HD微胶囊),并对其形貌结构、载药性能、缓释性能、黏附性能及斑马鱼胚胎急性毒性进行研究。结果表明:PDA@HD微胶囊外观呈球状,有明显核壳结构,平均粒径为353 nm;通过提高双重乳液W1相中HD的质量浓度,可以显著提升PDA@HD微胶囊中HD的搭载率,当HD质量浓度为18 mg/mL,其搭载率为17.1%;HD在PDA@HD微胶囊中的释放表现出明显的pH依赖性,偏酸性环境更有利于HD的释放;PDA@HD微胶囊的黏附力提高明显,其平均黏附力(8.42 nN)约为HD (2.89 nN)的3倍;PDA@HD微胶囊的斑马鱼胚胎急性毒性有所降低,当PDA@HD微胶囊内的HD质量浓度为0.5 mg/mL时,斑马鱼胚胎发育至96 hpf仍无死亡。
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关键词:
- 己脒定二羟乙基磺酸盐 /
- 聚多巴胺 /
- 微胶囊 /
- 黏附性能 /
- 去屑剂
Abstract: Adhesive polydopamine nanocapsules containing hexamidine diisethionate (PDA@HD nanocapsules) were prepared using W1/O/W2 emulsion templating to enhance wet adhesion capacity of HD. Thereafter, the morphological structure, loading and release properties, adhesion properties and acute toxicity to zebrafish embryos of PDA were investigated. The results showed that the PDA@HD nanocapsules were spherical with a distinct core-shell structure whose average particle size was 353 nm. The loading ratio of PDA@HD nanocapsules could be effectively increased by increasing the concentration of HD in W1 phase of W1/O/W2 emulsion. Specifically, by increasing the concentration of HD to 18 mg/mL,the loading ratio of PDA@HD nanocapsules increased to 17.1%. The release of HD in PDA@HD nanocapsules exhibited a clear pH dependence and PDA@HD nanocapsules showed better release properties in acidic environment. The adhesion force of PDA@HD nanocapsules was effectively increased about 3 times that of HD. The PDA@HD nanocapsules reduced the acute toxicity to zebrafish embryos. When the concentration of HD in PDA@HD nanocapsules was 0.5 mg/mL, all zebrafish embryos survived till 96 hpf.-
Key words:
- hexamidine diisethionate /
- polydopamine /
- nanocapsules /
- adhesion property /
- anti-dandruff active
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