Cited by 36biodegradable polymer synthesis and propertiesNatural Fiber Reinforced CompositesAdvanced Cellulose Research Studies

Effect of Cellulose and Cellulose Nanocrystal Contents on the Biodegradation, under Composting Conditions, of Hierarchical PLA Biocomposites

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Galera Manzano, Luciano Miguel, Ruz Cruz, Miguel Ángel, Moo Tun, Nora Magally, Valadez González, Alex, Mina Hernandez, José Herminsul·2021·Polymers

Abstract

In this work, the effect of microfibrillated cellulose (MFC) and cellulose nanocrystals (CNCs) on the biodegradation, under composting conditions, of hierarchical PLA biocomposites (HBCs) was studied using a full 22 factorial experimental design. The HBCs were prepared by extrusion processing and were composted for 180 days. At certain time intervals, the specimens were removed from the compost for their chemical, thermal and morphological characterizations. An ANOVA analysis was carried out at different composting times to study MFC and CNCs’ effects on biodegradation. The specimen’s mass loss and molecular weight loss were selected as independent variables. The results show that the presence of MFC enhances the PLA biodegradation, while with CNCs it decreases. However, when both cellulosic fibers are present, a synergistic effect was evident—i.e., in the presence of the MFC, the inclusion of the CNCs accelerates the HBCs biodegradation. Analysis of the ANOVA results confirms the relevance of the synergistic role between both cellulosic fibers over the HBC biodegradation under composting conditions. The results also suggest that during the first 90 days of incubation, the hydrolytic PLA degradation prevails, whereas, beyond that, the enzymatic microbial biodegradation dominates. The SEM results show MFC’s presence enhances the surface biodeterioration to a greater extent than the CNCs and that their simultaneous presence enhances PLA biodegradation. The SEM results also indicate that the biodegradation process begins from hydrophilic cellulosic fibers and promotes PLA biodegradation.

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  1. [46]Montgomery D.C. Design and Analysis of Experiments 5th ed. John Wiley & Sons Hoboken, NJ, USA 1978

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Authors
Galera Manzano, L. M., Ruz Cruz, M. Á., Moo Tun, N. M., Valadez González, A., & Mina Hernandez, J. H.
Affiliations
  • Unidad de Materiales, Centro de Investigación Científica de Yucatán, A.C., Calle 43 #. No 130, Col. Chuburná de Hidalgo, Mérida 97205, Yucatán, Mexico
  • Grupo Materiales Compuestos, Universidad del Valle, Calle 13 No. 100-00, Cali 76001, Colombia
Venue
Polymers
Publisher
MDPI AG
Published
2021-06-02
Volume
13
Issue
11
Pages
1855
ISSN
2073-4360 (ISSN-L)
OpenAlex
W3168350480
Cited by
36
References
59
Citations by year
2026: 6 · 2025: 12 · 2024: 9 · 2023: 5 · 2022: 4
FWCI
1.18
Type
journal article
Language
en
Open access
Locations
  • Polymers (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • CONACYT, México (CB2013-220000)
  • MinCiencias (project 63587 with contract 185-2019)
Topics
  • Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
  • Physical Sciences › Materials Science › Polymers and Plastics › Natural Fiber Reinforced Composites
  • Physical Sciences › Materials Science › Biomaterials › Advanced Cellulose Research Studies
Keywords
polylactic acid, cellulose nanocrystals, microfibrillated cellulose, composting, biodegradation, synergistic effect, hydrolytic degradation, enzymatic degradation, extruded composites, mass loss, molecular weight reduction

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