Surface Modification of Wood Using Nitric Acid

Acidity of Wood

“…It must not be construed, however, that the pH value arid buffering capacity of wood are the only factors affecting its bonding. Further experiments in our laboratories have shown the applicability of this analytical technique to the de- termination of bound acid generated by nitric acid treatment of wood, and thus to follow the kinetics of the reaction (Subramanian et al 1982). The type of acid groups generated has been established to be carboxylic acid, and their ability to initiate the in situ polymerization of furfuryl alcohol in wood jhas also been observed.…”

The Acidity of Bound Wood Acid: A New Method for Determining the Acidity of Insoluble Acids

“…Douglas fir Pallman wood flakes (0.038 cm thick) were treated with a 50% aqueous nitric acid solution and washed with water äs described before (Subramanian, Balaba and Somasekharan 1982). The resultant oxidized wood was then divided into two portions.…”

“…Such a plot (Fig. For example, the bound wood acid was established to be carboxylic in nature (Subramanian, Balaba and Somasekharan 1982). Using the calibration plot (Fig.…”

“…In a recent investigation in our laboratories, the treatment of wood with nitric acid was found to generate carboxylic acid groups on wood which were referred to äs bound wood acid (Subramanian, Balaba and Somasekharan 1982). The importance.…”

A review of preparation of binderless fiberboards and its self-bonding mechanism

“…On the other hand, acid treatment was usually considered as a prehydrolysis before steam explosion due to its significant effect on the structure of raw materials (Anglès et al 2001). It was suggested that nitric acid activation of wood surfaces involved oxidation, nitration and hydrolysis of wood polymers Subramanian et al 1982;Young et al 1982). Therefore, the concentration and treatment time of alkaline and acid need to be Wood Sci Technol carefully controlled in order to avoid excessive degradation of main components in raw materials.…”