Synthesis of citric acid crosslinked PVA/tapioca starch bioplastic reinforced with grafted cellulose

F. G. Nugroho, N. M. Nizardo, E. Saepudin

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Citations (Scopus)

Abstract

Cellulose was grafted by palmitic acid with a yield of 61 ± 14 %. The crystallinity of cellulose decreased after grafting. PVA/starch bioplastic films were synthesized from PVA crosslinked with tapioca starch by the addition of activated citric acid as a crosslinker and then reinforced with the addition of cellulose and grafted cellulose. Activated citric acid was produced by converting the acid into a more reactive anhydrous state through heating. Characterization was carried out by FTIR. In addition, tensile test, swelling test, and solubility test were also carried out. Transparency of the plastics increased after the addition of starch, and further increased after the addition of cellulose. PVA films was very soluble in water because of the OH groups on its backbone structure. Crosslinking with starch and the strengthening with cellulose were able to reduce the swelling and solubility. However, the addition of grafted cellulose was unable to improve swelling and solubility because of the palmitic acid disturbing the plastic network. The addition of starch, cellulose, and grafted cellulose, respectively decreased the tensile strength of the original PVA films. Strength wise, PVA and crosslinked PVA/starch films were similar to that of HDPE and LDPE, respectively, yet elasticity wise they are much weaker.

Original languageEnglish
Title of host publicationProceedings of the 5th International Symposium on Current Progress in Mathematics and Sciences, ISCPMS 2019
EditorsTerry Mart, Djoko Triyono, Tribidasari Anggraningrum Ivandini
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735420014
DOIs
Publication statusPublished - 1 Jun 2020
Event5th International Symposium on Current Progress in Mathematics and Sciences, ISCPMS 2019 - Depok, Indonesia
Duration: 9 Jul 201910 Jul 2019

Publication series

NameAIP Conference Proceedings
Volume2242
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference5th International Symposium on Current Progress in Mathematics and Sciences, ISCPMS 2019
Country/TerritoryIndonesia
CityDepok
Period9/07/1910/07/19

Keywords

  • cellulose
  • Citric acid
  • crosslinking
  • poly(vinyl alcohol)
  • tapioca starch

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