DWI-LEIBNIZ-INSTITUT FÜR INTERAKTIVE MATERIALIEN E.V.
发明人:
Yongliang ZHAO,Martin MÖLLER,Xiaomin ZHU
申请号：
US15741820
公开号：
US20180200689A1
申请日:
2016.07.05
申请国别(地区):
US
年份:
2018
代理人:
摘要：
The present invention relates to a method for enclosing either hydrophobic or hydrophilic substances in silica-based micro- and nanocapsules via emulsion techniques. More specifically, it relates to a method for the preparation of 0.01-100 μm, particularly 0.01-10 μm, silica-based microcapsules containing up to 99% (w/w) payload using a silica precursor polymer, polyalkoxysiloxane (PAOS), preferentially polyalkylalkoxysiloxane (R-PAOS), which acts not only as a silica source but also an emulsifier. In order to obtain mechanically stable capsules, the conversion of PAOS or R-PAOS is accompanied with the solidification of the organic phase. For the encapsulation of hydrophobic substances, oil-in-water emulsions are formed. The formation of water-in-oil-in-water double emulsions is required to encapsulate hydrophilic compounds.
