Preparation and adsorption properties of surface⁃functionalized polyacrylate porous beads for Cu2+

doi:10.19491/j.issn.1001-9278.2022.07.002

Abstract

Abstract:

In this work， poly（tert?butyl methacrylate） porous beads with an open?hole structure and a uniform particle size were prepared through a W/O/W concentrated emulsion/suspension polymerization method using a concentrated emulsion as an oil phase for suspension polymerization. The effects of emulsifier content and stirring speed on the internal microporous morphology and particle size of the resultant porous beads were investigated. The results indicated that a uniform micropore distribution was obtained in the polymer beads at an emulsifier content of 4 wt%. The average particles size of the porous beads decreased with an increase in stirring speed. The beads with different particle sizes were treated through acidic hydrolyzation to obtain the surface?functionalized porous beads with carboxyl groups. The functionalized beads achieved effective adsorption to copper ions （Cu²⁺） thanks to their multiporous structure. The functionalized beads with an average particle size between 200~300 μm obtained a maximum removal rate of 99.3 % for the absorption of copper ions.

Key words: concentrated emulsion, suspension polymerization, porous bead, poly（tert?butyl methacrylate）, acid hydrolysis, copper ion adsorption

CLC Number:

TQ323.4

SONG Jin, XU Hang, ZOU Wei, WANG Hong, ZHANG Chen. Preparation and adsorption properties of surface⁃functionalized polyacrylate porous beads for Cu²⁺[J]. China Plastics, 2022, 36(7): 8-13.

Figures/Tables 7

油相（浓乳液）

水相

甲基丙烯酸叔丁酯含量/g

三羟甲基丙烷

三丙烯酸酯/g

PEG⁃PPG⁃PEG

含量/g

BPO

含量/g

甲苯

含量/g

水含

量/mL

MBAM

含量/g

PVA

含量/g

APS

含量/g

水含

量/mL

Tab.1. Formulation of poly（tert?butyl acrylate） porous beads

Fig.1. Calibration curve of copper ion solution with linearity concentration

Fig.2. SEM of poly（tert?butyl methacrylate） porous beads

Fig.3. SEM of poly（tert?butyl methacrylate） porous beads with different emulsifier contents

Fig.4. SEM of poly（tert?butyl methacrylate） porous beads prepared at different stirring speeds in suspension polymerization

Fig.5. FTIR of poly（tert?butyl methacrylate） before and after hydrolysis

Fig.6. Cu2+ adsorption performance of porous beads with different particle sizes

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Preparation and adsorption properties of surface⁃functionalized polyacrylate porous beads for Cu²⁺

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