甲壳胺/乙酸溶液表观粘度的影响因素

在低剪切速率下,研究了甲壳胺的浓度、溶液静置时间、溶液温度及溶剂乙酸浓度对甲壳胺/乙酸溶液表观粘度的影响。结果表明:甲壳胺/乙酸溶液的表观粘度随甲壳胺浓度的增加而上升,随溶液温度的上升而降低,随乙酸浓度的增加有所降低。配制甲壳胺/乙酸纺丝原液时,需现用现配,甲壳胺质量分数4.5%,乙酸质量分数2.0%,溶液温度20℃为宜。

Factors affecting apparent viscosity of chitosan/acetic acid solution

The effects of chitosan concentration,solution standing time,solution temperature and acetic acid concentration on the apparent viscosity of chitosan/acetic acid solution were studied at low shearing rate.The results showed that the apparent viscosity of chitosan/acetic acid solution was increased while raising the chitosan concentration,was decreased while elevating the solution temperature,and was decreased in some degree while increasing the acetic acid concentration.The chitosan/acetic acid solution should be prepared at the proportion of 4.5% chitosan and 2.0% acetic acid by mass fraction with the proper solution temperature of 20 ℃ when using.