| Yazarlar |
Doç. Dr. Temel Kan BAKIR
Kastamonu Üniversitesi, Türkiye |
| Özet |
| Gums are widely used in the paper, textile and petroleum industries. Gums, such as carboxymethyl cellulose (CMC) is synthetically derived from cellulose are used for microencapsulation of medicinal and food products. The aim of the study was to determine its ionization properties and acidic property. The dissociation behaviour of cellulose gum has been investigated by potentiometric titration. The apparent acidity constant, pKa and the intrinsic acidity constant, pK0, have been determined from potentiometric titrations of carboxymethyl cellulose [degree of substitution (DS) = 0.70-0.85] in salt-free aqueous solutions of various concentrations at 20 °C. Furthermore effect of different neutralizing agents were tested on the titration curves. It was found that the extended Henderson-Hasselbalch equation reproduced measured data well and the dissociation suppressed progressively either by decreasing CMC concentration or with increasing counterion size. The concentration dependence of pH for different values of degree of dissociation (α), was found in the following form for CMC (degree of substitution = 0.70-0.85), [pH]0α = 5.04 + 2.72 log [α/(1-α)]. |
| Anahtar Kelimeler |
| Apparent acidity constant | Carboxymethyl cellulose | Potentiometric titration |
| Makale Türü | Özgün Makale |
| Makale Alt Türü | SCOPUS dergilerinde yayımlanan tam makale |
| Dergi Adı | Asian Journal of Chemistry |
| Dergi ISSN | 0970-7077 |
| Dergi Tarandığı Indeksler | CHEMICAL ABSTRACTS (U.S.A.) CHEMICAL TITLES (U.S.A.) BIOCHEMISTRY ABSTRACTS (U.S.A.) F.Z. ANAL. CHEM. (WEST GERMANY) RESEARCH ALERT (Q) GOOGLE SCHOLAR DEST (AUSTRALIA) PARYAVARAN ABSTRACTS (INDIA) THERMAL ANALYSIS TITLES (INDIA) INDIAN SCIENCE ABSTRACTS BULLETIN OF SOCIETY OF KINETICISTS OF INDIA CURRENT RESEARCH ON MEDICAL AND AROMATIC PLANTS (INDIA) SCOPUS EUROPEAN VIRTUAL INSTITUTE OF SPECIATION ANALYSIS (EVISA, DATA BASE) VITIS-VEA (GERMANY) ProQuest CAB ABSTRACTS(U.K.) CA PLUS (U.S.A.) GLOBAL HEALTH (U.K.) ACADEMIC SEARCH RESEARCH DEVELOPMENT ZETOC (BRITISH LIBRARY) EBSCOhost Our other JournalsAJMCAJOMC Search ArticlesType : Author Name/Keyword/ Manuscript No.Search..Volume : Issue : Page : |
| Makale Dili | İngilizce |
| Basım Tarihi | 03-2018 |
| Cilt No | 30 |
| Sayı | 5 |
| Sayfalar | 1019 / 1022 |
| Doi Numarası | 10.14233/ajchem.2018.21115 |
| Atıf Sayıları |
