Title:
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Melt-processing of cellulose nanofibril/polylactide bionanocomposites via a sustainable polyethylene glycol-based carrier system
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Author:
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Cailloux, Jonathan; Raquez, Jean-Marie; Lo Re, Giada; Santana Pérez, Orlando Onofre; Bonnaud, Leila; Dubois, Philippe; Maspoch Rulduà, Mª Lluïsa
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. e-PLASCOM - Plàstics i Compòsits Ecològics |
Abstract:
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Considering the appealing need for an industrially viable approach, this works aims at demonstrating the rapid and easy melt processing of Polylactide (PLA) bio-composites reinforced with cellulose nanofibrils (CNF). For this purpose and against to their high propensity to self-aggregate on processing, an aqueous CNF-based suspension in the presence of polyethylene glycol (PEG) followed by a gentle drying way were performed to provide melt-processable CNF-based masterbatches. Morphological observations coupled with rheological analyses confirmed how the strategy of the PEG-based masterbatch approach facilitated the formation of a well-dispersed and strongly interacting CNF network within the polymeric matrix. At temperatures above Tg, thermo-mechanical characterization showed that the load-bearing capacity of the web-like CNF network was even more apparent and counteracted the PEG plasticizing effect. Thermogravimetric analysis evidenced that in the case of selective positioning at the PLA-PEG interface, CNF mitigated the negative impact of PEG addition on the PLA thermal stability. These results revealed the successfulness of our sustainable organic solvent-free approach to prepare melt-processable CNF masterbatches, which can be readily converted into conventional industrially scalable melt-processing techniques. |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria dels materials -Biopolymers -Polylactic acid -Nanofibers -Polyethylene -Polymer melting -Polylactide -Cellulose nanofibrils -Polyethylene glycol -Sustainable process -Melt-processing -Biopolimers -Àcid polilàctic -Nanofibres -Polietilè -Polimers – Fusió |
Rights:
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Document type:
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Article - Submitted version Article |
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