Hill, Callum A S, Forster, S C, Farahani, M R M, Hale, M D C, Ormondroyd, G A and Williams, G R (2005) An investigation of cell wall micropore blocking as a possible mechanism for the decay resistance of anhydride modified wood. International Biodeterioration & Biodegradation, 55 (1). pp. 69-76.Full text not available from this repository.
Corsican pine (Pinus nigra) sapwood was chemically modified with acetic, or hexanoic anhydride to a variety of weight percentage gains. The cell wall microporosity of the wood before and after chemical modification was determined using the technique of solute exclusion. The results showed that the cell wall microporosity decreased as the level of substitution increased, but the cell wall remained accessible at high levels of substitution. Values of the fibre saturation point (FSP) calculated from solute exclusion data ranged from c. 40% (for unmodified wood) to c. 20% at approx. 25% weight percentage gain, but were dependent to some degree upon the calculation method. Evidence is presented suggesting that the reduction in FSP may be attributable to bulking of the cell wall by bonded acyl adduct. It is concluded that the level of hydroxyl substitution in the cell wall is not the primary mechanism for giving decay protection in anhydride-modified wood.
|Uncontrolled Keywords:||Wood; Acetylation; Decay resistance; Solute exclusion; Fibre saturation point;|
|University Divisions/Research Centres:||Faculty of Engineering, Computing and Creative Industries > School of Engineering and the Built Environment|
|Dewey Decimal Subjects:||600 Technology > 690 Building & construction > 694 Wood construction & carpentry
500 Science > 540 Chemistry > 542 Techniques, equipment & materials
500 Science > 580 Plants (Botany) > 582 Plants noted for characteristics & flowers > 582.16 Trees
|Library of Congress Subjects:||Q Science > QD Chemistry
T Technology > TA Engineering (General). Civil engineering (General)
S Agriculture > SD Forestry
|Depositing User:||RAE Import|
|Date Deposited:||27 May 2008 14:36|
|Last Modified:||09 Oct 2014 15:56|
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