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Facile Morphology Control during Rapid Fabrication of Nanosized Organosilica Particles
Version 2 2022-04-25, 15:04
Version 1 2020-08-07, 10:46
journal contribution
posted on 2022-04-25, 15:04 authored by Zhinan Fu, Li Li, Fen Li, Rizwan Ahmed, Xiaofeng Niu, Dianhua Liu, Xuhong GuoNanosized organosilica particles with tunable morphology are of
great interest for versatile applications because of their enhanced
properties. However, it is still a great challenge to control the
morphology during fabrication of organosilica nanoparticles (NPs).
In this study, a facile approach based on flash nanoprecipitation
(FNP) technique is presented, which achieves an efficient fabrication
of organosilica NPs with controllable morphology by utilizing an amphiphilic
block copolymer poly(2-(dimethylamino)ethylmethylacrylate-b-poly(ε-caprolactone) (PDMAEMA-b-PCL) as the stabilizer. Such a preparation process is performed
in a multi-inlet vortex mixer that enables an intense mixing of the
silicon precursor with the aqueous solution of a catalyst at an ultrashort
time scale, leading to the formation of numerous tiny reaction droplets
stabilized by PDMAEMA-b-PCL, followed by the basic-catalyzed
hydrolytic condensation. Interestingly, by controlling the composition
and mixing parameter of feeding streams involved in the FNP process,
golf ball-like, cubic, bowl-like, and hollow organosilica NPs can
be easily obtained. The resultant NPs show a narrow size distribution
and are expected to find potential applications in various fields,
such as nanomedicine, nanocatalysts, and adsorption separation.
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ultrashort time scalenarrow size distributioninlet vortex mixerfeeding streams involvedfacile approach basedcatalyzed hydrolytic condensationresultant nps showfind potential applicationshollow organosilica npsfacile morphology controlorganosilica npsversatile applicationsnps ).organosilica nanoparticlesvarious fieldstunable morphologysilicon precursorpreparation processpdmaema -<mixing parameterintense mixinggreat interestgreat challengegolf ballflash nanoprecipitationenhanced propertieseasily obtainedcontrollable morphologyb aqueous solutionadsorption separation>- pcl
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