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Your search keyword '"3-CHLORO-2-HYDROXYPROPYLTRIMETHYLAMONIUM CHLORIDE"' showing total 2 results
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2 results on '"3-CHLORO-2-HYDROXYPROPYLTRIMETHYLAMONIUM CHLORIDE"'

1. Temperature-dependent etherification of cassava starch with CHPTAC for cationic starch production

Author

Sri Rahayu, Basuki Wirjosentono, Evi Oktavia, Cut Fatimah Zuhra, Khatarina Meldawati Pasaribu, Averroes Fazlur Rahman Piliang, Nico Setyawan Sihotang, Juliati Br Tarigan, Jonathan Siow, Ronn Goei, Alfred Iing Yoong Tok, and Saharman Gea

Subjects
Cassava starch, Cationic starches, 3-Chloro-2-hydroxypropyltrimethylamonium chloride, Etherification, Heating temperature, Environmental engineering, TA170-171, Chemical engineering, TP155-156
Abstract

This research explores utilizing abundant and economical cassava as a raw material for producing cationic starch in Indonesia. Cationic starch was synthesized by etherifying cassava starch with CHPTAC monomer at 50–90 °C. Successful cationic modification was confirmed via FTIR and NMR spectra. Characterization revealed the 80 °C product exhibited optimal properties: high degree of substitution (0.35) and reaction efficiency (98 ± 1.2 %). The amorphous form of the 80 °C product reduced its thermal resistance. This economically viable process uses readily available cassava to produce high-value cationic starch, currently an expensive imported product, demonstrating potential to enhance domestic production and reduce import reliance.

Published
2024
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2. Studies on the cationization of agarose

Author

Héctor Juan Prado, Ana Lea Cukierman, Pablo Ricardo Bonelli, and María C. Matulewicz

Subjects
Spectrometry, Mass, Electrospray Ionization, Magnetic Resonance Spectroscopy, Spectrophotometry, Infrared, Infrared Rays, Propanols, Electrospray ionization, Infrared spectroscopy, Epoxide, Borohydrides, Biochemistry, Chloride, Analytical Chemistry, chemistry.chemical_compound, Cations, medicine, Organic chemistry, Viscosity, Sepharose, Otras Ciencias Químicas, Organic Chemistry, CATIONIC POLYSACCHARIDE, Ciencias Químicas, AGAROSE, General Medicine, Nuclear magnetic resonance spectroscopy, Quaternary Ammonium Compounds, chemistry, Reagent, Microscopy, Electron, Scanning, Degradation (geology), Agarose, CATIONIZATION, 3-CHLORO-2-HYDROXYPROPYLTRIMETHYLAMONIUM CHLORIDE, CIENCIAS NATURALES Y EXACTAS, Nuclear chemistry, medicine.drug
Abstract

Cationized agaroses with different degrees of substitution (0.04–0.77) were synthesized, employing 3-chloro-2-hydroxypropyltrimethylammonium chloride (CHPTAC). The influence of different reaction parameters on the substitution degree and molecular weight was evaluated. The investigated parameters were concentration of reagents, temperature, time, and addition of NaBH4. The products were characterized by means of scanning electronic microscopy, infrared spectroscopy, viscosimetry, and NMR spectroscopy. Methanolysis products were studied by electrospray ionization mass spectrometry. The higher the concentration of CHPTAC employed, a higher degree of substitution was obtained, if the optimum concentration of NaOH in each case was employed. Insufficient quantities of NaOH reduced epoxide formation and the reacting alkoxides of the polysaccharide, whereas an excess of NaOH favored degradation of the epoxide and decrease in the molecular weight of the product. A reaction time of 2 h was sufficient to obtain products with the maximum degree of substitution for each case. The addition of NaBH4 gave products with a slightly higher molecular weight, but the extra cost involved should not justify its use for large-scale application. Fil: Prado, Héctor Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones En Hidratos de Carbono. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones En Hidratos de Carbono; Argentina Fil: Matulewicz, Maria Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones En Hidratos de Carbono. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones En Hidratos de Carbono; Argentina Fil: Bonelli, Pablo Ricardo. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Industrias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Cukierman, Ana Lea. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Industrias; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Departamento de Tecnología Farmacéutica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina

Published
2011

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