Skip to main content
U.S. flag

An official website of the United States government

Contribution of residual proteins to the thermomechanical performance of cellulosic nanofibrils isolated from green macroalgae

Author(s):

Jiaqi Guo
Khan Mohammad Ahsan Uddin
Karl Mihhels
Wenwen Fang
Päivi Laaksonen
Orlando J. Rojas

Year:

2017

Publication type:

Scientific Journal (JRNL)

Primary Station(s):

Forest Products Laboratory

Source:

ACS Sustainable Chemistry & Engineering. 5(8): 6978-6985.

Description

Cellulosic nanofibrils (CNFs) were isolated from one of the most widespread freshwater macroalgae, Aegagropila linnaei. The algae were first carboxylated with a recyclable dicarboxylic acid, which facilitated deconstruction into CNFs via microfluidization while preserving the protein component. For comparison, cellulosic fibrils were also isolated by chemical treatment of the algae with sodium chlorite. Compared with the energy demanded for deconstruction of wood fibers, algal biomass required substantially lower levels. Nevertheless, the resultant nanofibrils were more crystalline (crystallinity index > 90%) and had a higher degree of polymerization (DP > 2500). Taking advantage of these properties, algal CNFs were used to produce films or nanopapers (tensile strength of up to 120 MPa), the strength of which resulted from protein-enhanced interfibrillar adhesion. Besides being translucent and flexible, the nanopapers displayed unusually high thermal stability (up to 349 °C). Overall, we demonstrate a high-end utilization of a renewable bioresource that is available in large volumes, for example, in the form of algal blooms.

Citation

Guo, Jiaqi; Uddin, Khan Mohammad Ahsan; Mihhels, Karl; Fang, Wenwen; Laaksonen, Päivi; Zhu, J. Y.; Rojas, Orlando J. 2017. Contribution of residual proteins to the thermomechanical performance of cellulosic nanofibrils isolated from green macroalgae. ACS Sustainable Chemistry & Engineering. 5(8): 6978-6985.

Cited

Publication Notes

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
https://www.fs.usda.gov/treesearch/pubs/55950