4.7 Article

Favorable combination of foldability and toughness of transparent cellulose nanofibril films by a PET fiber-reinforced strategy

期刊

出版社

ELSEVIER
DOI: 10.1016/j.ijbiomac.2020.08.196

关键词

Cellulose nanofibrils; PET fibers; Transparent CNF films; Toughness; Foldability

资金

  1. National Natural Science Foundation of China [21978103]
  2. Natural Science Foundation of Guangdong Province [2020B1515020021]
  3. Pearl River S&T Nova Program of Guangzhou [201806010141]
  4. Fundamental Research Funds for the Central Universities [2019MS083]
  5. Guangdong University Students Special Fund for Science and Technology Innovation Cultivation [pdjh2020b0050]
  6. Hundred Step Ladder Climbing Plan for South China University of Technology [j2tw201902060]
  7. College Student Innovation and Entrepreneurship Training Program [201910561015]

向作者/读者索取更多资源

Transparent cellulose nanofibril (CNF) films have been considered a promising sustainable alternative for nonrenewable and nonbiodegradable petroleum-based plastic films. However, their relatively low toughness and poor folding endurance are two remaining challenges for commercial application. In this work, inspired by fiber-reinforced polymer, a transparent CNF film with favorable combination of toughness and folding endurance is demonstrated by a facile and scalable polyethylene terephthalate (PET) fiber-reinforced strategy. The as-prepared PET fiber-reinforced CNF film not only exhibits a maximum average toughness of 13.7 +/- 2.4 MJ/m(3) that is nearly 4 times stronger than that of pure CNF film (3.7 +/- 1.1 MJ/m(3)), but also presents superior bending flexibility with a folding endurance of over 10(4) times that is an order of magnitude higher than that of pure CNF film (similar to 4 x 10(3) times). Moreover, its underlying principle for the enhanced toughness and foldability is explored. This work provides a facile strategy to prepare tough yet foldable CNF film and could promote its industrial uses in the fields of energy storage devices, packaging, and electronic devices. (C) 2020 Published by Elsevier B.V.

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