Preparation and thermal stability of carboxymethyl starch/quaternary ammonium salts complexes

Synthesis and characterization of carboxymethyl potato starch and its application in reactive dye printing

“…4A, a gelatinization endotherm is detected at 67.4 • C in native starch sample. This observation is consistent with the parameters reported for other tuber crops starches, such as cassava [27,28], yam [23], and cocoyam [29]. As observed, gelatinization enthalpy of the representative CMPS could not be determined (Fig.…”

Carboxymethyl Starch/Montmorillonite Aqueous Dispersions: The Effect of Components and Mixing Method on Rheoviscometric Characteristics

“…Generally, aqueous dispersions of MMT-Na and OMMT with CMS did not exhibit visual tendency to environmental degradation during storage (no mold formation). The presence of clay influenced the transmittance of CMS/MMT systems, more noticeable in a case of OMMT (Table II), which may be the result of the interaction between anionic charges of CMS and cationic ammonium groups of the clay modifier, containing a long aliphatic chain, causing partial turbidity of the dispersion, 23 as mentioned earlier. The stability tests allow assuming that MMT-Na could work as an efficient thickener and suspension stabilizer.…”

“…As a result, partial precipitation of CMS/quaternary ammonium salt with a long aliphatic chain (above C 12 ) complexes could be considered, similar to the systems of CMC/long aliphatic chain cationic surfactant. 23 The stability of CMS solution and CMS/MMT dispersions has been evaluated by the measurements of viscosity and transmittance after some time of storage (up to 1.5 year) ( Table II). The viscosity of CMS aqueous solution or dispersion with MMT as a rule has decreased with time, with the exception of the systems with OMMT ZS1.…”

Efficient method of starch functionalization to bis-quaternary structure unit

“…Starch is one of the most important renewable resources because of its easy availability, biodegradability, and low cost. There is little information in literature on the functionalization of starch to the ionic structure [15][16][17][18][19][20]. The OH groups of starch molecule are substituted into a cationic polymer by positively charged groups such as CHPTAC and EPTMAC.…”