A study of wet and dry strength properties of unaged and hygrothermally aged paper sheets reinforced with biopolymer composites |
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| Authors: | Abeer M. Adel Anne‐Laurence Dupont Hussein Abou‐Yousef Ahmed El‐Gendy Sabrina Paris Nabila El‐Shinnawy |
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| Affiliation: | 1. Department of Cellulose and Paper, National Research Center, Dokki, Cairo, Egypt;2. Centre de Recherche sur la Conservation des Collections, Muséum National d'Histoire Naturelle, Paris, France |
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| Abstract: | Biopolymers and their composites were added during the formation of unbleached Kraft bagasse pulp paper sheets to improve the mechanical strength properties of the produced hand sheets. The biopolymers (cellulose, chitosan, and chitosan‐cellulose composite) were either crosslinked or noncrosslinked and they were added in series of concentrations from 0.1% to 1.5%. The characterization of the samples using the Fourier transform infrared (IR) technique identified differences in the intensities of the characteristic IR absorption bands for chitosan, cellulose, and their composites, these differences are due to the various degrees of hydrogen bonding. The surface morphology of the biopolymers composites and the treated paper sheets were studied using SEM technique. Both the equilibrium moisture sorption and the diffusion coefficient of the paper sheets containing 1% additives were evaluated at regular time intervals. The long‐term stability of the treated paper with biopolymers was verified by exposing the treated and the untreated sheets to hygrothermal ageing. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40761. |
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| Keywords: | ageing biodegradable biomaterials blends cellulose and other wood products |
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