冷水可溶性马铃薯淀粉的低温上浆性能

Sizing property of cold water soluble potato starch at low temperature

为探讨冷水可溶性马铃薯淀粉(GCWS)应用于低温上浆的可行性,采用乙醇碱法制备GCWS马铃薯淀粉,对其制备工艺进行优化,并测试其在65~95℃内浆液黏度、黏附力以及上浆率、增强率、增磨率等指标,与工厂中普遍使用的马铃薯氧化淀粉的浆液性能进行比较。结果表明:65~95℃时GCWS马铃薯淀粉的黏度都较低,符合浆料低黏度的要求;85~95℃时GCWS马铃薯淀粉的黏附力与马铃薯氧化淀粉相近,而在65~75℃时黏附力略低。单纱上浆试验结果表明,75~95℃时GCWS马铃薯淀粉的增强率超过25.49%,耐磨率超过38.89%,与95℃时马铃薯氧化淀粉的性能相近,符合上浆要求。GCWS马铃薯淀粉是一种高浓低黏的浆料,在75℃时上浆性能和马铃薯氧化淀粉相近,可应用于纱线低温上浆,降低能耗。

In order to study sizing of the granular cold water soluble potato starch（ GCWS） at low temperature,GCWS was prepared by optimized alcohol-alkaline method. The sizing properties of GCWS including viscosity,adhesion capability,sizing ratio,enhancement ratio and abrasion resistance were tested when the yarns were sized at low temperature from 65 ℃ to 95 ℃. The size property of GCWS was compared with the industrially used potato oxidized starch to validate the feasibility of sizing of GCWS at low temperature. The experiment results indicate that the viscosity of GCWS potato starch from 65 ℃ to95 ℃ is low,which meets the requirement of pulp with low viscosity. The adhesion of GCWS potato starch is close to that of potato oxidized starch from 85 ℃ to 95 ℃,while the adhesion of GCWS potato starch is slightly lower when sizing at 65 ℃ to 75 ℃. According to the sizing experiments with single yarn from 75 ℃ to 95 ℃,the enhancement ratio and abrasion resistance of GCWS potato starch are larger than25. 49% and 38. 89%,which are close to the corresponding property of potato oxidized starch at 95 ℃,meeting sizing requirements at low temperature. The sizing property of GCWS,therefore,is close to that of potato oxidized starch, and GCWS is applicable for sizing at 75 ℃ which can reduce energy consumption due to high concentration and low viscosity.