疏水改性羟丙基胍胶(Hm-HPG)水溶液黏度行为研究

Viscosity Behavior of Water Solution of Hydrophobically Modified Hydroxypropyl Guar Gum(Hm-HPG)

该文研究了疏水改性羟丙基胍胶(Hm-HPG)水溶液的黏度行为。结果表明:当Hm-HPG水溶液浓度超过临界缔合浓度cac后,溶液表观黏度(ηa)会迅速增加;水溶液中Hm-HPG质量分数为0.4%时,ηa随温度的升高经历升高-降低-平衡的变化过程,在20℃附近出现最大值;水溶液的ηa随NaCl、KCl和CaCl2加入量的增大不断增加,NaCl对溶液ηa增加的贡献最大,KCl次之,CaCl2最弱。当水溶液中Hm-HPG-R16和Hm-HPG-R12质量分数分别高于0.2%和0.3%时,十二烷基硫酸钠(SDS)与疏水聚合物存在着明显的相互作用。

When the density of the hydrophobically modified hydroxypropyl guar gum （Hm-HPG） water solution exceeded the critical associating density （cac）, the apparent viscosity （ηa） of the solution increased rapidly. The ηa of W （Hm-HPG） = 0. 4% went through an increasing-decreasing-balance course with temperature increasing, and there was a maximum at about 20 ℃. The ηa of the water solution increased with the contents of sodium chloride, potassium chloride and calcium chloride. Effect of sodium chloride was the greatest, potassium chloride was the second, and finally calcium chloride. In water solution when the mass percentage of Hm-HPG-R16 and Hm-HPG-R12 exceeded 0. 2% and 0.3 %, respectively, there was an interaction between sodium dodecyl sulfate （SDS） and them.