Citation: Wan Guangping, Xia Hongjun, Wang Jun, Liu Jiawei, Song Botao, Yang Ying, Bai Quan. Synthesis of SiO₂@SiO₂ core-shell microspheres using urea-formaldehyde polymers as the templates for fast separation of small solutes and proteins[J]. Chinese Chemical Letters, ;2018, 29(1): 213-216. doi: 10.1016/j.cclet.2017.06.004 shu

Synthesis of SiO₂@SiO₂ core-shell microspheres using urea-formaldehyde polymers as the templates for fast separation of small solutes and proteins

Wan Guangping ^a ,
Xia Hongjun ^a ,
Wang Jun ^a,b ,
Liu Jiawei ^a ,
Song Botao ^a ,
Yang Ying ^a ,
Bai Quan ^a,,

a.
Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Institute of Modern Separation Science, Key Lab of Modern Separation Science in Shaanxi Province, Northwest University, Xi'an 710069, China
b.
Shaanxi Research Design Institute of Petroleum and Chemical Industry, Shaanxi Dangerous Chemical Supervision and Inspection Center, Xi'an 710054, China

Corresponding author: Bai Quan, baiquan@nwu.edu.cn
Received Date: 23 March 2017
Revised Date: 26 April 2017
Accepted Date: 2 June 2017
Available Online: 4 January 2017

Figures(6)

Superficially porous core-shell silica microspheres (CSSMs) have been a great success for the fast separation of small molecules and proteins in recent years. In this paper, the CSSMs were synthesized by an improved polymerization-induced colloid aggregation (PICA) method using urea-formaldehyde polymers as the templates. The agglomeration of the functionalized silica core was avoided by the surface modification through reflux with ureidopropyltrimethoxysilane in the neutral ethanol solution at 80℃, and the secondary nucleation of the silica nanoparticles during the preparation process could also be inhibited via the optimization of the reaction conditions, such as pH, temperature, colloidal silica sol concentration and the reaction time. The controllable shell thickness and pore size of the synthesized monodisperse CSSMs were successfully obtained by adjusting the weight ratio of silica core/colloidal silica sol and the particle size of colloidal silica sol, respectively. The C18-modified CSSMs with different pore sizes were used to separate small solutes and proteins. The higher efficient separation and relatively low back pressure of the synthesized core-shell column demonstrate that the CSSMs have a great potential application for fast HPLC.
- Core-shell silica microsphere,
- Polymerization-induced colloid aggregation,
- Urea-formaldehyde polymers,
- Fast separation,
- HPLC
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Synthesis of SiO2@SiO2 core-shell microspheres using urea-formaldehyde polymers as the templates for fast separation of small solutes and proteins

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通讯作者: 陈斌, bchen63@163.com

Synthesis of SiO₂@SiO₂ core-shell microspheres using urea-formaldehyde polymers as the templates for fast separation of small solutes and proteins