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| Effect of Montmorillonite Content on the Ordered Structure of Cellulose Nanofibrils-based Composite Film |
| Received:January 06, 2026 Revised:April 03, 2026 |
| DOI：10.11980/j.issn.0254-508X.2026.07.002 |
| Key Words:cellulose nanofibrils montmorillonite ordered structure structure-property relationship |
| Fund Project:国家自然科学基金（U23A6005）；广东省基础与应用基础研究基金（2025A1515010005，2023B1515040013，2023A1515011026）。 |
| Author Name | Affiliation | Postcode | | He Xinliang* | School of Light Industry Science and Engineering, State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | Fang Zhiqiang* | School of Light Industry Science and Engineering, State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | Li Guanhui | School of Light Industry Science and Engineering, State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | Peng Liyuan | School of Light Industry Science and Engineering, State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 |
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| Abstract:In this study, TEMPO-oxidized cellulose nanofibrils (TOCNF)/montmorillonite (MMT) composite films were prepared by solution casting, and the effects of content of MMT on the ordered structure and structure-property relationships of the TOCNF/MMT composite films were systematically investigated. The results showed that when the content of MMT was 10%~40%, MMT nanosheets could be regularly stacked within the composite films, forming a dense and ordered lamellar structure. This structure effectively promoted interfacial stress transfer, leading to a significant enhancement in the tensile strength of the composite films, with a maximum value of 142.5 MPa, corresponding to 129% of that of the TOCNF film. Meanwhile, the composite films maintained high optical transmittance of approximately 92% and low haze of approximately 5%. However, the content of MMT increased to 50%~80%, agglomerates with diameters of approximately 1~3 μm appeared within the composite films, resulting in reduced regularity of the layered structure and local structural disorder. Such disordered structures induced stress concentration, thereby markedly deteriorating the mechanical properties of the composite films, with the tensile strength decreasing to as low as 44.9 MPa. In addition, the disordered structure increased the porosity and pore size of the composite films, thereby increasing the number of interfacial area between TOCNF, MMT and air, and enhancing the light scattering, caused a decrease in optical transmittance from 90.4% to 78.6% and a substantial increase in haze from 37.7% to 52.9%. |
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