Use of an Acylated Chitosan Schiff Base as an Ecofriendly Multifunctional Biolubricant Additive

Autor:	Raj K. Singh, Dilip K. Adhikari, Gajendra M. Bahuguna, Sandeep Saran, Alok K. Chatterjee, Neeraj Atray, Aruna Kukrety, Gananath D. Thakre
Rok vydání:	2014
Předmět:	Schiff base Chemistry General Chemical Engineering General Chemistry Chloride Industrial and Manufacturing Engineering Thermogravimetry Chitosan Solvent chemistry.chemical_compound Lubricity Stearate Pyridine medicine Organic chemistry medicine.drug Nuclear chemistry
Zdroj:	Industrial & Engineering Chemistry Research. 53:18370-18379
ISSN:	1520-5045 0888-5885
DOI:	10.1021/ie502441z
Popis:	Two acylated chitosan Schiff base samples ACSB-1 and -2 were synthesized via a two-step reaction pathway. First the chitosan Schiff base (CSB) was prepared utilizing 3,5-di-tert-butyl-4-hydroxybenzaldehyde. In the second step, esterification with lauroyl chloride catalyzed by 4-(dimethylamino)pyridine (DMAP) in N,N-dimethylacetamide (DMAc) solvent affords the final product acylated chitosan Schiff base (ACSB-1 and -2). The products were identified and characterized by Fourier transform infrared (FT-IR) spectroscopy, CHN analysis, thermogravimetry (TG), X-ray diffraction (XRD), etc. The synthesized compounds were evaluated as multifunctional additives for antioxidant and lubricity properties in N-butyl palmitate/stearate. A rotating pressure vessel oxidation test (ASTM D2272) was used for evaluating antioxidant property. The thermo-oxidative stability of the N-butyl palmitate/stearate oil was increased 1.5 times by using this additive in 3000 ppm concentration of ACSB-2 at 150 °C. Lubricity property was ev...
Databáze:	OpenAIRE
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