Abstract

Oxidation using H202 brings about degradation of valonia extract. Three typical products with novel properties were obtained when 20%, 40% and 60%H2O2(conc. 50%) were used. Determinations indicated that the oxidising reaction leads to lowering of molecular weight, lightening of colour, improving of acid and salting-out resistances and increasing of hydrophilic groups, carboxyl in particular. The more interes ting results are that penetrating rates of the degraded products in pelt are markedly accelerated and that the alkali resistance of complex compounds of the products and Cr(III) or Al(II1) is considerably increased. The effects above are enhanced with increasing offer ofH202.The conditions for oxidising degradation are described and the potentials of utilising the products are discussed.