Effect of Starch Addition on Grafting Efficiency on PVOH-coated Surface Layer

Kyoung-Hwa Choi; Doo-Hyun Kim; Jeong-Yong Ryu; Myoung-Ku Lee

doi:10.7584/JKTAPPI.2019.06.51.3.39

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Effect of Starch Addition on Grafting Efficiency on PVOH-coated Surface Layer 전분 혼합이 PVOH 코팅 표면층의 그라프팅 효율에 미치는 영향

30 June 2019. pp. 39-44

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Abstract

This study was conducted to find the possibility of replacing synthetic polymer polyvinyl alcohol (PVOH) with a natural polymer starch in manufacturing PVOH-coated paper for food packaging. Accordingly, different amounts of starches containing PVOH were coated on paper. Further, esterification was performed with palmitoyl chloride using the gas chromatography grafting technology. The grafting efficiency was evaluated using the Cobb size value and static contact angle of the PVOH-starch coated paper varying the addition amount of starch.

The addition of starch resulted in an increased Cobb size value and a decreased static contact angle of the coated paper. These changes were proportional to the amount of starch mixed with PVOH, resulting from a reduction in the proportion of the hydroxyl groups available. Therefore, the grafted fatty acid content also decreased with the increasing amount of starch added. However, these results conclude that environment friendly starch can be substituted for PVOH in packaging substrate with hydrophobicity because no significant decrease in the hydrophobicity of the PVOH-starch coated paper was observed with less than 10% of starch.

Keywords

Gas grafting

PVOH-starch coated paper

natural polymer

hydrophobicity

food packaging

References

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Information

Publisher :Korea Technical Association of The Pulp and Paper Industry
Publisher(Ko) :한국펄프종이공학회
Journal Title :Journal of Korea TAPPI
Journal Title(Ko) :펄프종이기술
Volume : 51
No :3
Pages :39-44
Received Date : 2019-05-14
Revised Date : 2019-06-07
Accepted Date : 2019-06-10
DOI :https://doi.org/10.7584/JKTAPPI.2019.06.51.3.39

Journal of Korea TAPPI ISSN:0253-3200(Print) 펄프종이기술

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Literature Cited