Cited by 188Polymer composites and self-healingAdvanced Materials and MechanicsAdvanced Cellulose Research Studies

Characterization of nanocellulose‐ reinforced shape memory polyurethanes

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Auad, María L, Contos, Vasili S, Nutt, Steve, Aranguren, Mirta I, Marcovich, Norma E·2008·Polymer International

Abstract

BACKGROUND: Shape memory polymers are capable of fixing a transient shape and of recovering their original dimensions by the application of an external stimulus. Their major drawback is their low stiffness compared to smart materials based on metals and ceramics. To overcome this disadvantage, nanocellulose was utilized as reinforcement. RESULTS: Composites were prepared by casting stable nanocellulose/segmented polyurethane suspensions. The heat of melting of the polyurethane soft segment phase increased on cellulose addition. Composites showed higher tensile modulus and strength than unfilled films (53% modulus increase at 1 wt% nanocellulose), with higher elongation at break. Creep deformation decreased as cellulose concentration increased (36% decrease in 60‐minute creep by addition of 1 wt% nanocellulose). The nanocomposites displayed shape memory properties equivalent to those of the neat polyurethane, with recoveries of the order of 95% (referred to second and further cycles). CONCLUSIONS: It is possible to markedly improve the rigidity of shape memory polymers by adding small amounts of well‐dispersed nanocellulose. However, this improvement did not have substantial effects on the material shape fixity or recovery. Shape memory behavior seems to continue to be controlled by the polymer properties. Copyright © 2007 Society of Chemical Industry

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  • A small amount of well-dispersed cellulose nanowhiskers remarkably improved the stiffness of shape memory polymer, while no obvious decrease in shape memory properties was observed.

    “A small amount of well-dispersed cellulose nanowhiskers remarkably improved the stiffness of SMP, while no obvious decrease in shape memory properties was observed.”
  • A small amount of well-dispersed cellulose nanowhiskers remarkably improved the stiffness of SMP, while no obvious decrease in shape memory properties was observed.

    “A small amount of well-dispersed cellulose nanowhiskers remarkably improved the stiffness of SMP, while no obvious decrease in shape memory properties was observed.”

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Authors
Auad, M. L., Contos, V. S., Nutt, S., Aranguren, M. I., & Marcovich, N. E.
Affiliations
  • University of Southern California (US)
  • Consejo Nacional de Investigaciones Científicas y Técnicas (AR)
Corresponding author
Marcovich, Norma E
Venue
Polymer International
Publisher
Wiley
Published
2007-12-13
Volume
57
Issue
4
Pages
651-659
ISSN
  • 0959-8103 (ISSN-L)
  • 1097-0126
OpenAlex
W2088914014
Cited by
188
References
31
Citations by year
2026: 2 · 2025: 3 · 2024: 2 · 2023: 5 · 2022: 19 · 2021: 15 · 2020: 11 · 2019: 16 · 2018: 11 · 2017: 11 · 2016: 10 · 2015: 14 · 2014: 12 · 2013: 17 · 2012: 14
FWCI
4.97
Type
journal article
Language
en
Open access
Locations
  • Polymer International (publishedVersion)
  • CONICET Digital (CONICET) (submittedVersion, cc-by-nc-sa)
Funders
  • Science and Technology National Promotion Agency (14604)
  • National Research Council of Argentina
  • National University of Mar del Plata
  • Merwyn C Gill Foundation
Topics
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer composites and self-healing
  • Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
  • Physical Sciences › Materials Science › Biomaterials › Advanced Cellulose Research Studies
Keywords
shape memory polymers, nanocellulose, segmented polyurethanes, nanocomposites, mechanical reinforcement, tensile modulus, creep, shape recovery, shape fixity, heat of melting, soft segment, cellulose nanofibers

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