Southern pine impregnated with silicate solution containing cellulose nanofibrils

Published: 2012

Author(s):
Peng, Y.
Han, Y.
Gardner, D. J.

Publication Name: Holzforschung

Publication URL: https://www.degruyter.com/document/doi/10.1515/hf-2011-0128/html

Research Area:
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Abstract:

A drying process has been tested to impregnate southern pine (Pinus spp.) samples with sodium silicate solution. The effect of adding cellulose nanofibrils in the treating solution was also studied. The mechanical tests show that the flexural modulus of rupture (MOR) and modulus of elasticity (MOE) increased significantly with increasing concentration of sodium silicate. The highest MOR and MOE of the treated samples were 170±13 MPa and 19±1 GPa, respectively, while the corresponding data of the control sample were 98±8 MPa and 11±1 GPa respectively. Deposition of polymerized silicate in the wood cell lumina was observed. The compression strength was improved by the incorporation of polymerized silicate to increase the measured flexural properties. The presence of cellulose nanofibrils in the sodium silicate solution had no effect.