Working Paper Article Version 1 This version is not peer-reviewed

Fabrication of Eco-Friendly Superabsorbent Composites based on Waste Semicoke

Version 1 : Received: 1 September 2020 / Approved: 3 September 2020 / Online: 3 September 2020 (03:46:37 CEST)

How to cite: Wang, Y.; Zhu, Y.; Liu, Y.; Wang, A. Fabrication of Eco-Friendly Superabsorbent Composites based on Waste Semicoke. Preprints 2020, 2020090045 Wang, Y.; Zhu, Y.; Liu, Y.; Wang, A. Fabrication of Eco-Friendly Superabsorbent Composites based on Waste Semicoke. Preprints 2020, 2020090045

Abstract

A series of novel superabsorbent composites of poly(acrylic acid)/semicoke were prepared by polymerization of acrylic acid using ammonium persulphate as initiator, N,N’-methylenebisacrylamide as crosslinker and semicoke which was the by-product of coal carbonizing as the inorganic components. FTIR and SEM analysis indicated that the superabsorbent composites had been successfully polymerized and the semicoke participated into the construction of 3D polymeric network. Meanwhile, the effects of initiator, crosslinker, semicoke, neutralization degree as well as the pH value were investigated, and the results showed that superabsorbent composites containing 10% of semicoke possessed the maximum water absorbency of 584 g/g in distilled water and 75 g/g in 0.9 % NaCl solution. The superabsorbent composites kept the high water absorbency within a wide pH range of 4-11, and still exhibited better re-swelling capability even after seven times. The superabsorbent composite with the excellent performance is a potential water-retaining agent used in the agriculture.

Subject Areas

superabsorbent composites; semicoke; water absorbency

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