Characteristics of Spent Coffee Grounds Holocellulose-PVA Composite Film

Kyojung Hwang; Jiwook Yang; Jihui Byeon; Hansol Choi; Dae-Young Kim

doi:10.7584/JKTAPPI.2021.12.53.6.47

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2021 Vol.53, Issue 6 Preview Page Next Page

Characteristics of Spent Coffee Grounds Holocellulose-PVA Composite Film 커피찌꺼기 유래 홀로셀룰로오스-PVA 복합 필름의 특성

30 December 2021. pp. 47-53

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Abstract

This study was conducted to produce a composite film with delignified spent coffee grounds-holocellulose (SCG-H) and PVA at different ratios and analyze the physicochemical properties. The SEM results showed that the composite film surface became rough as the concentration of SCG-H increased. In the XRD analysis results, the crystal structure was changed by crosslinking in the composite film, and there was no difference in the XRD pattern according to the mixing ratio. In addition, as the amount of SCG-H increased, the crystallinity of the film decreased. The composite film did not undergo pyrolysis even at about 480℃ or higher, which was considered to be due to the increased thermal stability by crosslinking. In the result of FT-IR analysis of the composite film, a peak of the ester C=O group was observed at about 1,720 cm^-1. This indicates that SCG-H and PVA were cross-linked by citric acid. Meanwhile, the tensile strength and elongation of the composite films tended to decrease as the SCG-H concentration increased. This result indicates that SCG-H affected the crystallinity reduction of the composite film. It is expected that the output of this study can be applied to various biodegradable material industries such as agricultural mulching film and food packaging materials.

Keywords

Spent coffee grounds

polyvinyl alcohol

composite film

crosslinking

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 : 53
No :6
Pages :47-53
Received Date : 2021-11-23
Revised Date : 2021-12-15
Accepted Date : 2021-12-17
DOI :https://doi.org/10.7584/JKTAPPI.2021.12.53.6.47

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

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Literature Cited