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  • β-Cyclodextrin-based oil-absorbent microspheres: preparation and high oil absorbency.

β-Cyclodextrin-based oil-absorbent microspheres: preparation and high oil absorbency.

Carbohydrate polymers (2012-10-10)
Ci Song, Lei Ding, Fei Yao, Jianping Deng, Wantai Yang
ABSTRACT

This article reports the preparation and evaluation of polymeric microspheres as a new class of oil-absorbent (POAMs). Based on our earlier oil-absorbents, the present microspheres contained β-cyclodextrin (β-CD) moieties as both cross-linking agent and porogen agent, and showed exciting high oil absorbency, fast oil absorption speed and good reusability. Such microspheres were prepared via suspension polymerization with octadecyl acrylate and butyl acrylate as co-monomers, β-CD derivative as cross-linking agent, 2,2'-azoisobutyronitrile as initiator and polyvinylalcohol as stabilizer. Oil absorbency of the POAMs was, for CCl(4), 83.4; CHCl(3), 75.1; xylene, 48.7; toluene, 42.8; gasoline, 30.0; kerosene 27.1; and diesel, 18.2 g/g (oil/POAMs). Saturation oil absorption reached within 3h in CCl(4). The POAMs exhibited high oil retention percentage (>90%), and can be reused for at least 10 times while keeping oil absorbency almost unchanged.

MATERIALS
Product Number
Brand
Product Description

Supelco
Butyl acrylate, analytical standard
Sigma-Aldrich
Butyl acrylate, ≥99%, contains 10-60 ppm monomethyl ether hydroquinone as inhibitor
Sigma-Aldrich
Butyl acrylate, SAJ first grade, ≥99.0%