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Cellulose

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Mechanical performance and thermal stability of polyvinyl alcohol–cellulose aerogels by freeze drying

  • Ting Zhou
  • Xudong Cheng
  • Yuelei Pan
  • Congcong Li
  • Lunlun Gong
Original Research
  • 19 Downloads

Abstract

Polyvinyl alcohol (PVA)/cellulose nanofibers (CNFs)/Gelatin hybrid organic aerogels were synthesized using a facile and environmentally friendly freeze-drying method. The biobased gelatin acted as a cross-linking agent and combined PVA and CNFs tightly by hydrogen bonds. The composites were characterized and analyzed by various techniques including uniaxial compression test, scanning electron microscopy, as well as thermal conductivity analysis and TGA–DTG analyses. The mechanical properties were strengthened significantly with the introduction of a small amount of gelatin. The modulus of PVA/CNF/G3 was 1.65 MPa, nearly eightfold of the PVA/CNF aerogel and 91 times higher than the neat CNF aerogel. Microstructure analyses revealed the three-dimensional network of the aerogels. The composites also possess good thermal stability, low density, and low thermal conductivity. Therefore they have broad prospects in the field of thermal insulation.

Graphical abstract

Keywords

Polyvinyl alcohol Cellulose nanofibers Gelatin Aerogel Mechanical properties 

Notes

Acknowledgments

The work supported by National Keypoint Research and Invention Program of the Thirteenth, Anhui Programs for Science and Technology Development (No. 1604a0902175) and Fundamental Research Funds for the Central Universities (Grant No. WK2320000035).

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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  1. 1.State Key Laboratory of Fire ScienceUniversity of Science and Technology of ChinaHefeiPeople’s Republic of China

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