Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 5, Issue 24, Pages 13412-13418Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am4043273
Keywords
nanocomposite; nanofibrillated cellulose; nanopaper; mineral; talc
Funding
- Academy of Finland [250940]
- Academy of Finland (AKA) [250940, 250940] Funding Source: Academy of Finland (AKA)
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Hybrid organic inorganic films mimicking natural nacre-like composite structures were fabricated from cellulose nanofibers obtained from sequential periodate chlorite oxidation treatment and talc platelets, using a simple vacuum-filtration method. As a pretreatment, commercial talc aggregates were individualized into well-dispersed talc platelets using a wet stirred media mill with high-shear conditions to promote the homogeneity and mechanical characteristics of hybrids. The nanofiber talc hybrids, which had talc contents from 1 to 50 wt %, were all flexible in bending, and possessed tensile strength and Young's modulus values up to 211 +/- 3 MPa and 12 +/- 1 GPa, respectively, the values being remarkably higher than those reported previously for nanofibrillated cellulose talc films. Because of the lamellar and well-organized structure of hybrids in which the talc platelets were evenly embedded, they possessed a small pore size and good oxygen barrier properties, as indicated by the preliminary results. The talc platelets decreased the moisture adsorption of highly talc-loaded hybrids, although they still exhibited hydrophilic surface characteristics in terms of contact angles.
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