Synthesis and characterization of composite gels starch-graftacrylic acid/bentonite (St-g-AA/B) using N'Nmethylenebisacrylamide (MBA)

13th Joint Conference on Chemistry

Ayu Laksanawati, Trias^1 ; Novarita Trisanti, Prida^1 ; Sumarno^1

Chemical Engineering Department, Faculty of Industrial Technology, Institut Teknologi Sepuluh Nopember (ITS), Surabaya, Indonesia^1

关键词: Composite gels;    Copolymerization process;    Graft co polymerizations;    Hydrophilic polymer networks;    Morphological structures;    N-methylenebisacrylamide;    Synthesis and characterizations;    Water absorbency;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/509/1/012150/pdf
DOI  :  10.1088/1757-899X/509/1/012150

来源: IOP

【 摘 要 】

Composite gels are three-dimensional hydrophilic polymer networks that can absorb high amount of water, and eco-friendly. In this study, composite gels starch-graft-acrylic acid/bentonite (St-g-AA/B) was successfully synthesized by graft copolymerization using starch as natural polymer and bentonite. The acrylic acid that neutralized 40% parts with NaOH was used in copolymerization process. The graft copolymerization process uses potassium persulfate (KPS) as a free radical initiator and N,N-Methylenebisacrylamide (MBA) solution as a crosslinker. The synthesis process was conducted at 70°C for two hours under nitrogen atmosphere. Factor influencing of water absorbency such as amount bentonite in the weight and volume ratio were investigated. The results show that composite gels starch-graft-acrylic acid/bentonite (St-g-AA/B) had an optimum bentonite value of 2 %wt acrylic acid with water absorbency obtained were 205.94 g/g and 157 mL/mL. The graft copolymerization reaction was characterized by Fourier Transform Infrared Spectroscopy (FTIR) and morphological structure of product was evidenced by Scanning Electron Microscopy (SEM).