Synthesis and characterization of carboxymethyl potato starch and its application in reactive dye printing.
Carboxymethyl potato starch (CMPS) was synthesized with a simple dry and multi-step method as a product of the reaction of native potato starch and monochloroacetic acid in the presence of sodium hydroxide. The influence of the molar ratio of sodium hydroxide to anhydroglucose unit, the volume of 95% (v/v) ethanol, the rotation rate of motor driven stirrer and the reaction time for degree of substitution (DS) were evaluated. The product was characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and X-ray diffractometry (XRD). FTIR spectrometry showed new bonds at 1618 and 1424 cm⁻¹ when native starch underwent carboxymethylation. SEM pictures showed that the smooth surface of native starch particles was mostly ruptured. XRD revealed that starch crystallinity was reduced after carboxymethylation. The viscosity of the mixture paste of carboxymethyl starch and sodium alginate (SA) was measured using a rotational viscometer. In addition, the applied effect of mixed paste in reactive dye printing was examined by assessing the fabric stiffness, color yield and sharp edge to the printed image in comparison with SA. And the results indicated that the mixed paste could partially replace SA as thickener in reactive dye printing. The study also showed that the method was low cost and eco-friendly and the product would have an extensive application in reactive dye printing.
Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, PR China.
Bing
B
Zhang
Honghong
H
Gong
Shaoyu
S
Lü
Boli
B
Ni
Mingzhu
M
Liu
Chunmei
C
Gao
Yinjuan
Y
Huang
Fei
F
Han
D004396:Coloring Agents / Q000737:chemistry*; D055772:Green Chemistry Technology; D009930:Organic Chemicals; D011327:Printing / Q000379:methods*; D011198:Solanum tuberosum / Q000737:chemistry*; D013213:Starch / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry; D014783:Viscosity
D004396:Coloring Agents; D009930:Organic Chemicals; D013213:Starch; C034848:carboxymethyl starch