Starch Derivatives of High Degree of Functionalization, 8. Synthesis and Flocculation Behavior of Cationic Starch Polyelectrolytes

Utilização de hemiceluloses catiônicas, obtidas a partir do aproveitamento da palha de milho, associadas com tanino para o tratamento de efluentes de lavanderia industrial

“…Aliando estes fatos ao desenvolvimento de novos materiais utilizando matéria-prima renovável, neste trabalho é descrita a preparação de derivados catiônicos de hemicelulose a partir da palha de milho, visto que derivados catiônicos de celulose e amido já se mostraram promissores em diversas aplicações. 7,[15][16][17] Assim, a rota de síntese da hemicelulose catiônica baseou-se no trabalho de Ren et al, 6 que prepararam derivados catiônicos de hemicelulose de bagaço de cana-de-açúcar usando como reagente quaternizante o cloreto de 2,3-epoxipropiltrimetilamônio (ETA). Para a caracterização dos derivados catiônicos de hemicelulose obtidos da palha de milho empregou-se a análise elementar, análise termogravimétrica (TGA) e espectroscopia vibracional de absorção no infravermelho (FT-IR).…”

Tartaric Acid Starch Ether: A Novel Biopolymer‐Based Polyelectrolyte

“…[13] In this work cis-disodiumepoxysuccinate is studied as etheryfying agent, which can be simply prepared starting from maleic acid in good yield (see Experimental Part). The maleic acid is oxidized with hydrogen peroxide under aqueous conditions.…”

“…The amount of calcium ions bound increases with increasing DS for ethers prepared from potato starch (sample 4, 5, 8, see Table 2). In contrast, the relative amount of Ca 2þ ions fixed at the polymer decreases with increasing DS for tartatic acid starch ethers prepared from amylose rich Hylon VII (sample [12][13][14]. In case of amylopectin rich amioca powder (sample [15][16][17], the binding capacity is independent of the DS.…”

New cationic hydrophilic and amphiphilic polysaccharides synthesized by one pot procedure

“…Kettenes-van den Bosch, van der Kerk-van Hoof, & Hennink, 1997) and quaternary ammonium groups (Haack et al, 2002;Song et al, 2008), a proof for chemical structure depicted in Fig. 4 and reaction mechanism given in Scheme 2.…”

“…Synthesis of quaternary ammonium groups containing polysaccharides have been performed by using commercially available reagents such as N-(3-chloro-2-hydroxypropyl)-N,N,N-trimethylammonium chloride (CHPTAC) ((QUAB ® 188)) or N-(glycidyl)-N,N,N-trimethylammonium chloride (GTAC) (QUAB ® 151), and modified polysaccharides were cellulose (Abbott, Bell, Handa, & Stoddart, 2006;Song, Sun, Zhang, Zhou, & Zhang, 2008;Yan, Tao, & Bangal, 2009), microcrystalline cellulose (Antal & Micko, 1992), hemicellulose (Ren, Sun, Liu, Lin, & He, 2007), starch (Haack, Heinze, Oelmeyer, & Kulicke, 2002;Kavaliauskaite, Klimaviciute, & Zemaitaitis, 2008;Pal, Mal, & Singh, 2005;Wang & Xie, 2010), corn cob meal (Simkovic, Mlynar, & Alfoldi, 1992), glycogen (Pal, Mal, & Singh, 2006), arabinoxylan (Köhnke, Brelid, & Westman, 2009), tamarind kernel polysaccharide (Pal et al, 2009), guar gum , chitosan (Sajomsang, Gonil, & Tantayanon, 2009;Sajomsang, Tantayanon, Tangpasuthadol, & Daly, 2009), konjak glucomannan (Yu, Huang, Ying, & Xiao, 2007), maltodextrin (Loiseau, Imbertie, Bories, Betbeder, & De Miguel, 2002), or dextran (Thomas, Rekha, & Sharma, 2010). The modification can proceed in homogeneous (solutions) or heterogeneous media (suspensions).…”