Preparation of Diaminocellulose and Electrolytic Dissociation in Its Aqueous Solution

Abstract

The most suitable conditions to obtain diamino cellulose (DAmC) as a cationic polymer were investigated. Details of the experiment are as follows :
( 1 ) Preparation of dialdehyde cellulose (DAC): 1 g of cotton wool was soaked in 25 ml of aqueous solution containing 1.390 X 10-2 moles of H1O^2- and 1.575 X 10-2 moles of CH₃COONa and was oxidized in the dark place for 14 days at 8°C.
( 2 ) Preparation of dioxime cellulose (DOC): 1 g of DAC was soaked in 120 ml of 1.5 moles aqueous solution of NH₂OH·HCl for 15 hrs. at 5°C and its aldehyde groups were converted to oximes.
( 3 ) Preparation of DAmC: 2 g of DOC was soaked in 100 ml of CHs0H containing O.05 moles of NaBH4 and was reduced for 2 hrs 10°C, and this procedure of reduction was repeated again.
Next the electrolytic dissociation in the aqueous solution of this DAmC was investigated and found that a formula pH =pK+ n log(where K is equilibrium constant of the ionization, n is constant and a is the degree of ionization which is approximately regarded as the degree of neutralization) was applicable in the region where the neutralization of DAmC with 0.1 N HCl solution proceeded more than 27%, and that n and K were 1.55 and 4.68 X 10-8, respectively, at 25°C.
Furthermore, DAmC was allowed to react with CH, I to obtain the compound having methylamino groups, and the neutralization curve of this compound with HCl solution by the use of pH-meter was determined and investigated. t Studies on the Cationic Polymer. I.