Angelica Avella, Maria Rosella Telaretti Leggieri, Alexandros Efraim Alexakis, Eva Malmström, Giada Lo Re
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引用次数: 0
Abstract
The full exploitation of the outstanding mechanical properties of cellulose nanofibrils (CNFs) as potential reinforcements in nanocomposite materials is limited by the poor interactions at the CNF–polymer matrix interface. Within this work, tailor-made copolymers were designed to mediate the interface between CNFs and biodegradable poly(butylene adipate-co-terephthalate) (PBAT), and their effect on extruded nanocomposite performance was tested. For this purpose, two well-defined amphiphilic anchor–tail diblock copolymer structures were compared, with a fixed anchor block length and a large difference in the hydrophobic tail block length. The aim was to evaluate the impact of the copolymers’ chain length on the nanocomposite interface. The presence of amphiphilic diblock copolymers significantly improved the mechanical properties compared to those of PBAT nanocomposites containing unmodified CNFs. In particular, the copolymer with a longer tail was more effective for CNF–PBAT dispersion interactions, leading to a 65% increase of Young’s modulus of neat PBAT, while retaining high deformability (670%). The results provide insights into the effectiveness of a waterborne third component at the CNF–matrix interface and its structure–property relationship.
期刊介绍:
ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.