Improvement of mechanical and thermal properties of epoxy composites with citric acid modified and defibrated cellulose filler

Yano, Shotaro; Hsu, Yu I.; Uyama, Hiroshi

Polymer Degradation and Stability, 2025, 240, 111482

Number of Access:36（2025-10-15 19:04 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/102615

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Title
Improvement of mechanical and thermal properties of epoxy composites with citric acid modified and defibrated cellulose filler
Creator
CreatorName
Yano, Shotaro
NRID
1000010757678 1000010757678
ORCID
0000-0002-4533-7200 0000-0002-4533-7200
researchmap permalink
yuihsu yuihsu
Scopus Author ID
55389981500 55389981500
CreatorName
Hsu, Yu I.
NRID
1000070203594 1000070203594
ORCID
0000-0002-8587-2507 0000-0002-8587-2507
researchmap permalink
read0168389 read0168389
Scopus Author ID
7102108908 7102108908
CreatorName
Uyama, Hiroshi
Subject
Cellulose
Citric acid modification
Composite
Defibration
Epoxy resin
Description
Yano S., Hsu Y.I., Uyama H.. Improvement of mechanical and thermal properties of epoxy composites with citric acid modified and defibrated cellulose filler. Polymer Degradation and Stability 240, 111482 (2025); https://doi.org/10.1016/j.polymdegradstab.2025.111482.
Abstract
Cellulose is a biomass filler with low environmental impact; however, its application presents challenges such as poor affinity between hydrophobic plastics and hydrophilic cellulose and the aggregation of cellulose. In this study, citric acid-modified cellulose (CAC) was used as an environment-friendly filler for enhancing the mechanical properties of epoxy composites. CAC was prepared via the esterification of cellulose with citric acid. In addition, a defibrated CAC (F-CAC) with a fiber diameter of ∼140 nm was produced using a grinder. The addition of F-CAC doubled Young's modulus increased it from 1.07 GPa to 2.08 GPa, and raised the glass transition temperature by 1.8 °C. The microscopic observations of composites revealed that CAC demonstrated a greater affinity for matrix than that of unmodified cellulose, whereas F-CAC exhibited enhanced dispersibility within the composites. Carboxyl groups introduced during the citric acid-modification may have contributed to the interaction between the filler and epoxy network. The incorporation of CAC or F-CAC as fillers improved the mechanical and thermal properties of epoxy composites. This research expands the range of applications for CAC, an environmentally friendly filler. It is anticipated that CAC will facilitate the development of high-strength, low-environmental-impact epoxy.
Publisher
Elsevier Ltd
Source Title
Polymer Degradation and Stability
Volume (Issue)
240
Page
111482
Date of Issued
2025-06-19
Language
English
Handle URL
https://hdl.handle.net/11094/102615
PISSN
01413910
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1016/j.polymdegradstab.2025.111482
Access Rights
open access
CopyRight
© 2025. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article