High porosity cellulose nanopapers as reinforcement in multi-layer epoxy laminates
Utilizing high-performance cellulose nanopapers as 2D-reinforcement for polymers allows for realizing high-loading-fraction (80 vol-%), high-performance (strength > 150 MPa, modulus > 10 GPa) laminated nanopaper reinforced epoxy composites. Such cellulose nanopapers are inherently dense, which...
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| المؤلفون الرئيسيون: | , , , |
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| التنسيق: | مقال |
| اللغة: | English English English |
| منشور في: |
Elsevier Ltd
2020
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| الموضوعات: | |
| الوصول للمادة أونلاين: | http://irep.iium.edu.my/82235/1/82235_High%20porosity%20cellulose%20nanopapers.pdf http://irep.iium.edu.my/82235/2/82235_High%20porosity%20cellulose%20nanopapers_SCOPUS.pdf http://irep.iium.edu.my/82235/3/82235_High%20porosity%20cellulose%20nanopapers_WOS.pdf http://irep.iium.edu.my/82235/ https://www.sciencedirect.com/science/article/abs/pii/S1359835X20300178 |
| الوسوم: |
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| الملخص: | Utilizing high-performance cellulose nanopapers as 2D-reinforcement for polymers allows for realizing high-loading-fraction (80 vol-%), high-performance (strength > 150 MPa, modulus > 10 GPa) laminated nanopaper reinforced epoxy composites. Such cellulose nanopapers are inherently dense, which renders them difficult to be impregnated with the epoxy-resin. High-porosity nanopapers facilitate better resin impregnation, truly utilizing the properties of single cellulose nanofibres instead of the nanofibre network. We report the use of high-porosity (74%) but low strength and modulus bacterial cellulose (BC) nanopapers, prepared from BC-in-ethanol dispersion, as reinforcement for epoxy-resin. High-porosity nanopapers allowed for full impregnation of the BC-nanopapers with epoxy-resin. The resulting BC-reinforced epoxy-laminates possessed high tensile modulus (9 GPa) and strength (100 MPa) at a BC loading of 30 vol-%, resulting from very low void-fraction (3 vol-%) of these papregs compared to conventional nanopaper-laminates (10+ vol.-%). Better resin impregnation of less dense nanocellulose networks allowed for maximum utilization of stiffness/strength of cellulose nanofibrils. © 2020 Elsevier Ltd |
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