摘要
为探讨壳聚糖/羟丙基纤维素(HPC)共混材料的流变性与润湿力,通过测定体系黏度和剪切应力考察组成与温度对材料流变性的影响,测定膜的接触角以考察材料的润湿力。结果表明:除质量分数均为小于等于1%壳聚糖与HPC的共混溶液近似为牛顿流体外,其余均为非牛顿流体;溶液黏度随温度升高而降低;20℃时共混膜的润湿力大小顺序为甲醇>DMF>乙二醇>水;膜最低水接触角的温度依赖依次为20℃<40℃<30℃;弱酸或弱碱性介质均可提高膜的亲水性;当HPC质量分数为0～1%时,水接触角的空白值由71.04°最低可降至55.38°。
This paper deals with the rheological behavior and wetting power of chitosan/ hydroxypropyl cellulose （HPC） blend materials. Measuring the viscosity and shear stress of the blend solution by RVDV-Ⅱ PRO viscosimeter, the influences of composition and temperature on the rheological behavior of blend solution were observed, respectively. The contact angle （CA） of the film was measured by a K100 automatic surface tensiometer to investigate the chitosan / HPC blend materials wetting power. The results showed that almost all the mass ratio blend solutions belong to non-Newtonian fluid except the blends with mass fraction of not higher than 1% HPC and not higher than 1% chitosan-Newtonian fluid. The blend viscosity falls as temperature rises. The contact angle minimum is in the sequence as that of methanol 〈 that of ethylene glycol 〈 that of N,N-dimethylformamide 〈 that of distilled water at 20 ℃. Temperature change can make water CA decrease obviously, and the CA values are in the order of that： 20 ℃ 〈 40 ℃ 〈 30 ℃ when the mass fraction of HPC is below 0.25%. The pH rising or falling a little more can both lead to the CA falling. When the mass fraction of HPC in blend material was in 0 - 1% , the water CA changes from 71.04°to 55.38 °.
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2013年第5期25-29,共5页
Journal of Textile Research
基金
浙江省科技厅项目(2008C21005)
嘉兴学院科研启动项目(70502005)
关键词
壳聚糖
HPC共混材料
黏度
流变性
润湿力
chitosan/ HPC blend material
viscosity
rheological behavior
wetting power
