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Cellulose

pp 1–10 | Cite as

Fabrication of ultrastiff and strong hydrogels by in situ polymerization in layered cellulose nanofibers

  • Xianpeng YangEmail author
  • Subir K. Biswas
  • Hiroyuki Yano
  • Kentaro AbeEmail author
Original Research
  • 45 Downloads

Abstract

Integrating high stiffness, strength, and toughness on par with those of soft tissues into synthetic hydrogels is extremely challenging. We have proposed a method to overcome this problem: in situ polymerization of a polymer matrix in layered cellulose nanofibers. In an attempt, ionically cross-linked poly(acrylamide-co-acrylic acid) is fabricated in a wet cellulose nanofiber cake. The resulting hydrogels, called ionically cross-linked nanocomposite (ICN) hydrogels, exhibit a readily adjustable elastic modulus (11.9–190.0 MPa) and high fracture strength (generally > 10 MPa), which are comparable with those of skin and ligament. The high frictional force between the cellulose nanofibers and matrix is responsible for the stiffness of ICN hydrogels; while the tough matrix and weak direct interfibrillar interactions enable good stretchability. We expect that various kinds of cellulose nanofiber/polymer nanocomposite hydrogels with excellent mechanical properties and/or other features can be fabricated by simply changing the monomers.

Keywords

Nanocomposite hydrogels Cellulose nanofibers In situ polymerization Tensile properties Versatility 

Notes

Supplementary material

10570_2019_2822_MOESM1_ESM.docx (1.5 mb)
Supplementary material 1 (DOCX 1486 kb)

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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Research Institute for Sustainable HumanosphereKyoto UniversityKyotoJapan

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