Effect of polystyrene and silica compositions on formation of raspberry-like hollow nanoparticles: synthesis strategy and morphological study
Journal
Polymer Bulletin
Journal Volume
78
Journal Issue
11
Pages
6631
Date Issued
2021-11
Author(s)
Abstract
Raspberry-like hollow hybrid nanoparticles were facilely prepared via simultaneous miniemulsion sol–gel reaction/free radical polymerization of tetraethyl orthosilicate, 3-methacryloxypropyl trimethoxysilane (MEMO) and styrene (ST). MEMO played an important role in controlling their morphologies from dense silica nanoparticles to raspberry-like and raspberry-like hollow hybrid nanoparticles. The hybrid nanoparticles were obtained from the miniemulsion reaction technique with 2 wt% MEMO with or without ST exhibit raspberry-like hollow nanoparticles. The corresponding number-average diameter of hybrid nanoparticles increased from 112 to 126 nm as the ST concentration increased from 0 to 5 wt%. The (raspberry-like hollow) porous silica particle sizes after calcination are 47, 76, 78 and 85 nm for the runs with 0, 1, 2 and 5 wt% ST, respectively. Moreover, for constant level of MEMO at 2 wt%, the highest specific surface area (800 m2 g–1) was achieved for the runs with the ST concentration = 0–1 wt%. Then, it steadily decreased from ca. 710 to 510 m2 g–1 when the ST concentration increased from 1.5 to 20 wt%. As for constant level of ST at 0.5 wt%, the specific surface area is ca. 626, 797 and 580 m2 g–1 for the runs with 1, 2 and 3 wt% of MEMO, respectively.
Publisher
Springer Science and Business Media Deutschland GmbH
Type
journal article