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

Trias Ayu Laksanawati, Prida Novarita Trisanti, Sumarno*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)

Abstract

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).

Original languageEnglish
Article number012150
JournalIOP Conference Series: Materials Science and Engineering
Volume509
Issue number1
DOIs
Publication statusPublished - 3 May 2019
Event13th Joint Conference on Chemistry, JCC 2018 - Semarang, Indonesia
Duration: 7 Sept 20188 Sept 2018

Keywords

  • Bentonite
  • Composite gels
  • Graft copolymerization
  • Starch
  • Water absorbency

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