Towards standardization of laboratory preparation procedure for uniform cellulose nanopapers
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Cellulose nanopapers, 2D flat and foldable film made of network-forming cellulose nanofibers, are strong, tough and biodegradable materials of great interest as they have potential to replace the conventional fossil based polymers in various applications. Although there are several cellulose nanopaper preparation methods described in the literature, no standard method is available for the preparation of uniform and smooth nanopapers within a practical time frame. In present study, TAPPI standard method of preparation of pulp handsheets was systemically modified/optimized to prepare flat and wrinkle free cellulose nanopapers in few hours of preparation time. Physical properties of these cellulose nanopapers such as tensile strength and water vapor transmission rate were comparable to the reported values in the literature. The proposed standard preparation method will enable the comparison of the physical properties of cellulose nanopapers prepared in different studies.
KeywordsCellulose nanofibers Cellulose nanopaper Drainage time British handsheet maker Restricted drying
The authors gratefully acknowledge the financial support provided by Alabama Center for Paper and Bioresource Engineering.
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