Studies on the cationization of agarose

Cationization of Alpha-Cellulose to Develop New Sustainable Products

“…An alternative is the use of 3-chloro-2-hydroxypropyltrimethylammonium chloride (CHPTAC). CHPTAC has been successfully used for the cationization of cellulose [12][13][14][15], textile fibres [16][17][18][19][20], and other polysaccharides such as agarose or backbone of tamarind kernel polysaccharide (TKP), among others [21,22]. The flocculation efficiencies achieved for the resulting products are similar to those obtained with classical commercial polyacrylamides [21].…”

Partial and total C-6 oxidation of gelling carrageenans. Modulation of the antiviral activity with the anionic character

“…All the evidence points to C-2 of the 3,6-anhydrogalactose moiety. In a previous work of cationization of agarose (Prado, Matulewicz, Bonelli, & Cukierman, 2011), it has already been shown that O-2 of 3,6-AnGal could be about as reactive for an electrophilic attack as O-6 of the galactose moiety. A specific oxidation of this secondary position can also explain the lack of side reactions for the oxidation of -carrageenan, which has a sulfate group on O-2, as well as the specificity for the reaction on other polysaccharides not containing 3,6-anhydrogalactose.…”

Cationic curdlan: Synthesis, characterization and application of quaternary ammonium salts of curdlan

“…These cationic polysaccharides can be obtained by the reaction of the native polymers with various reagents with ammonium groups. The commercial reagents, glycidyltrimethylammonium chloride or 3-chloro-2-hydroxypropyltrimethylammonium chloride, are the most used to prepare quaternary ammonium salts of polysaccharides such as agarose (Prado, Matulewicz, Bonelli, & Cukierman, 2011), cellulose (Song, Sun, Zhang, Zhou, & Zhang, 2008;Yan, Tao, & Bangal, 2009), micro/nanocrystalin cellulose (Zaman, Huining, Chibante, & Ni, 2012), cellulose nanofibers (Khatri, Mayakrishnana, Hiratac, Wei, & Kima, 2013), chitin (Dinga et al, 2012), chitosan (Xu et al, 2011), dextran (Nichifor, Stanciu, & Simionescu, 2010), guar gum (Banerjee et al, 2013), konjac glucomannan (Yu, Huang, Ying, & Xiao, 2007), hemicellulose (Ren, Sun, Liu, Chao, & Luo, 2006), pullulan (Souguir, Roudesli, Picton, Le Cerf, & About-Jaudet, 2007), or starch (Auzely-Velty & Rinaudo, 2003;Heinze, Haack, & Rensing, 2004;Kavaliauskaite, Klimaviciute, & Zemaitaitis, 2008). These derivatives are widely used as flocculants or as thickener in different fields including waters treatment, papermaking, food, pharmaceutical, and cosmetic industries (Prado & Matulewicz, 2014).…”