Carboxymethyl and Nanofibrillated Cellulose as Additives on the Preparation of Chitosan Biocomposites: Their Influence Over Films Characteristics
| Autor: | Talita Szlapak Franco, Salvador García Enriquez, Graciela Inés Bolzon de Muñiz, Rosa María Jiménez Amezcua, Adriana Villa Rodrìguez, Eduardo Mendizábal Mijares, Maite Rentería Urquiza |
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| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Environmental Engineering Nanocomposite Absorption of water Materials science Polymers and Plastics 02 engineering and technology Polymer 021001 nanoscience & nanotechnology Nanocellulose Chitosan chemistry.chemical_compound Crystallinity 020401 chemical engineering Chemical engineering chemistry Ultimate tensile strength Materials Chemistry 0204 chemical engineering Cellulose 0210 nano-technology |
| Zdroj: | Journal of Polymers and the Environment. 28:676-688 |
| ISSN: | 1572-8919 1566-2543 |
| DOI: | 10.1007/s10924-019-01639-0 |
| Popis: | The aim of this research was to prepare chitosan composite films with commercial carboxymethylcellulose (CMC) and nanofibrillated cellulose (CNF) from palmito sheaths pulp (agroindustrial discard) and compare their influence over the film’s properties. The morphology of cellulose additives influenced their interaction with the polymer matrix as verified on the FTIR spectra and on the SEM images, where the poor dispersibility of CMC could be visualized as aggregates and clusters on chitosan matrix. The extensive defibrillated particles of CNF were well dispersed mainly by their high number of hydrogen bridges that promoted an increase in crystallinity index even in the low level of addition (0.5%). Molecule interactions directly influenced the film’s mechanical properties, where the addition of 1.5% of CNF resulted in an increment of 1.300% for Young’s modulus and 280% for tensile strength; a reduction of 20% of UV light transmittance and a decrease of almost 50% on water absorption. By the other side, even with an increase on the crystallinity index, the addition of CMC resulted in films with low mechanical and barrier properties as compared to the control film. The addition of nanocellulose overcame chitosan main weakness and leaded to a total renewable, biodegradable nanocomposite with adequate mechanical and physical properties to be applied on package development and with the extra attractive of being obtained from an agroindustrial residue, contributing with sustainability and environmental safety concerns. |
| Databáze: | OpenAIRE |
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