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The Impact of Surfa...
The Impact of Surface Charges of Carboxylated Cellulose Nanofibrils on the Water Motions in Hydrated Films
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- Guccini, Valentina, 1988- (author)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK),Stockholm University, Sweden; Aalto University, Finland,Stockholm Univ, Dept Mat & Environm Chem MMK, SE-10691 Stockholm, Sweden.;Aalto Univ, Sch Chem Engn, Dept Bioprod & Biosyst, Aalto 00076, Finland.
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- Yu, Shun (author)
- Stockholms universitet,RISE,Material- och ytdesign,Stockholm University, Sweden,Institutionen för material- och miljökemi (MMK),RISE Research Institute of Sweden, Sweden,Stockholm Univ, Dept Mat & Environm Chem MMK, SE-10691 Stockholm, Sweden.;RISE Res Inst Sweden, Div Bioecon & Hlth, Smart Mat, S-11486 Stockholm, Sweden.
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- Meng, Z. (author)
- Aalto University, Finland,Aalto Univ, Sch Chem Engn, Dept Bioprod & Biosyst, Aalto 00076, Finland.
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- Kontturi, E. (author)
- Aalto University, Finland,Aalto Univ, Sch Chem Engn, Dept Bioprod & Biosyst, Aalto 00076, Finland.
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- Demmel, F. (author)
- Rutherford Appleton Laboratory, UK,Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QZ, England.
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- Salazar-Alvarez, Germán (author)
- Uppsala universitet,Stockholms universitet,Institutionen för material- och miljökemi (MMK),Stockholm University, Sweden; Uppsala University, Sweden,Fasta tillståndets fysik,Stockholm Univ, Dept Mat & Environm Chem MMK, SE-10691 Stockholm, Sweden.
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(creator_code:org_t)
- 2022-07-05
- 2022
- English.
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In: Biomacromolecules. - : NLM (Medline). - 1525-7797 .- 1526-4602. ; 23:8, s. 3104-3115
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Abstract
Subject headings
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- Cellulose nanofibrils (CNFs) with carboxylated surface ligands are a class of materials with tunable surface functionality, good mechanical properties, and bio-/environmental friendliness. They have been used in many applications as scaffold, reinforcing, or functional materials, where the interaction between adsorbed moisture and the CNF could lead to different properties and structures and become critical to the performance of the materials. In this work, we exploited multiple experimental methods to study the water movement in hydrated films made of carboxylated CNFs prepared by TEMPO oxidation with two different surface charges of 600 and 1550 μmol·g-1. A combination of quartz crystal microbalance with dissipation (QCM-D) and small-angle X-ray scattering (SAXS) shows that both the surface charge of a single fibril and the films' network structure contribute to the moisture uptake. The films with 1550 μmol·g-1 surface charges take up twice the amount of moisture per unit mass, leading to the formation of nanostructures with an average radius of gyration of 2.1 nm. Via the nondestructive quasi-elastic neutron scattering (QENS), a faster motion is explained as a localized movement of water molecules inside confined spheres, and a slow diffusive motion is found with the diffusion coefficient close to bulk water at room temperature via a random jump diffusion model and regardless of the surface charge in films made from CNFs.
Subject headings
- NATURVETENSKAP -- Biologi -- Biokemi och molekylärbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Biochemistry and Molecular Biology (hsv//eng)
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Keyword
- carboxylic acid
- cellulose
- nanofiber
- water
- chemistry
- quartz crystal microbalance
- small angle scattering
- X ray diffraction
- Carboxylic Acids
- Nanofibers
- Quartz Crystal Microbalance Techniques
- Scattering
- Small Angle
- X-Ray Diffraction
Publication and Content Type
- ref (subject category)
- art (subject category)
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