The synthesis of 2- [aminoethyl]aminodeoxycellul ose from abaca pulp

Date

6-1998

Degree

Bachelor of Science in Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Evelyn B. Rodriguez

Co-adviser

Maxima E. Flavier

Abstract

PALMES, JEAN ALCARAZ, University of the Philippines Los Banos, June 1998. The S thesis of 2- [Aminoethyl] aminodeoxycellulose From Abaca Pulp.

Adviser: Evelyn B. Rodriguez, Ph. D.

Co-adviser: Maxima E. Flavier, Ph. D.

2-[Aminoethyl]aminodeoxycellulose (2), an aminoallcylcellulose, was prepared from 6-chlorodeoxycellulose (1) and ethylenediamine. The intermediate product (1) was obtained from the reaction of abaca pulp with thionyl chloride in N, N-dimethylforrnamide. The products obtained were characterized in terms of their solubility properties, degree of substitution (DS) and IR spectra. The DS of 24aminoethyl]aminodeoxycellullose (2) was found to be dependent on the amount of ethylenediamine and the reaction temperature. Based on the optimum reaction conditions, the DS of the products labelled EAC-A, EAC-B, and EAC-C were found to be 0.21, 0.13, and 0.14, respectively. These products were obtained from 6-chlorodeoxycelluloses with DS of 0.25, 0.21, and 0.29, respectively. IR spectral analysis of the products revealed new peaks which were previously absent in the spectra of abaca pulp. The IR spectrum of 6-chlorodeoxy-cellulose (1) showed new peaks at 1733.86 and 722.21cm' corresponding to aldehydic C=0 and C-C1 stretches, respectively, suggesting successful introduction of chlorine in the cellulose molecule but incomplete hydrolysis of the formyl groups of the cellulose formate side product. Broadening and the lower absorption of the peak at 3442.54 cm-1 in the IR spectrum of 2-[aminoethyl]aminodeoxycellulose (2) suggest the presence of amino groups.

EAC-A and EAC-B were tested for their chelating properties. The products were able to remove 0.72 and 0.30 meq Cd(II)/g from 50ml aqueous solutions containing 50 ppm of Cd2+ at their maximum adsorption time of 2 hours and 30 minutes, respectively

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1998 C4 P35

Document Type

Thesis

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