共查询到18条相似文献,搜索用时 94 毫秒
1.
2.
3.
使用毛细管高剪切黏度仪研究了滑石颜料分散体系的高剪切黏度性能,以及pH值、固含量、不同分散剂和润湿剂、不同粒径分布对滑石分散体系高剪切黏度的影响。同时还研究了滑石与GCC及高岭土混合浆料的高剪切黏度性能。结果表明,滑石含量越高、粒度越细,其分散浆料的高剪切黏度值越大。同时发现,滑石高剪切黏度受分散剂和润湿剂的影响不大。提高pH值有利于降低滑石分散体系的高剪切黏度。滑石与GCC混合浆料的高剪切黏度随着GCC粒度的变细而降低。当滑石与GCC的体系中加入高岭土后,混合浆料的高剪切黏度大幅增大,且随着GCC粒度的变细而增大。 相似文献
4.
5.
6.
造纸工业用涂料高岭土分散制浆工艺的探讨 总被引:3,自引:0,他引:3
本文针对膏状高岭土不易分散及分散过程中出现增稠现象,叙述了三种不同分散剂的化学特性、分散机理,操作工艺和条件及成本对比,对涂料制备厂家具有一定的参考价值。 相似文献
7.
8.
9.
共混是合成纤维改性常用的方法.用活性炭与丙烯脯─氯乙烯共聚体共混制得纺丝溶液,以二甲基甲酰胺为溶剂湿法纺丝制造了吸附和阻燃双功能聚丙烯膊纤维.本文主要探讨了共混溶液中活性炭含量,温度等条件对纺丝溶液流变性能的影响. 相似文献
10.
采用铝锆偶联剂对纳米CaCO3进行表面改性,着重探讨体系固含墩和pH值对改性纳米CaCO3水相分散体系流变行为的影响,并借助非牛顿流体模型实现流变参数的拟合.结果表明,随着改性纳米CaCO3水相分散体系固含量的增加,分散体系的流动性相对变筹.当改性纳米CaCO3分散体系同含量为10%时,拟合分析得到分散体系的屈服应力和零剪切黏度分别为1.254 Pa和0.1043 Pa·s;增加分散体系固含量至40%时,分散体系的屈服应力和零剪切黏度增大至7.563 Pa和146.0 Pa·8.当改性纳米CaCO3分散体系固含量为10%时,对于pH值为7的分散体系,拟合分析得到的屈服应力为1.879 Pa,而pH值为9的分散体系的屈服应力为1.250 Pa,这说明适宜的体系pH值有利于提高分散体系的稳定性和流动性. 相似文献
11.
12.
13.
14.
J. JOSEPH YUN YIN LIANG HSIEH DAVID M. BARBANO PAUL S. KINDSTEDT 《Journal of food science》1994,59(6):1302-1304
Cheeses with whey pH at draw of 6.15 or 6.40 were stored at 4°for 50 days. Compression test at 10°(Instron) showed a decrease in compressive stress with storage. Failure points were near a true strain value of 0.5 for the cheeses at day 3. The failure region became less obvious by day 50. The hypothetical equilibrium stress (HES) in the stress-relaxation test was higher with a draw pH of 6.40 than 6.15, possibly indicating that higher calcium led to a stronger network structure. The HES decreased with storage, suggesting cleavage of structural crosslinks caused by the coagulant. 相似文献
15.
M.C. Sánchez C. Valencia A. Ciruelos A. Latorre C. Gallegos 《Journal of food science》2003,68(2):551-554
ABSTRACT: This article deals with the influence that the addition of tomato slurry into tomato juice exerts on the viscous flow and linear viscoelastic behavior of the final tomato paste. With this aim, 5 tomato paste samples, manufactured at industrial scale, have been studied. Three breaking temperatures and 2 different screen sizes were used to prepare 4 regular tomato paste samples. Moreover, a tomato paste sample with addition of "treated tomato slurry" was manufactured using a breaking temperature of 80 °C and a sieve screen size of 1.2 mm. The results obtained suggest that the addition of treated tomato slurry may be of great interest for tomato paste production. 相似文献
16.
在不影响成纸质量的情况下,在背涂、预涂涂料中使用流变剂替换全部羧甲基纤维素(CMC),改善了涂料流动性能,提高了涂料固含量. 相似文献
17.
Rheological and Water-Holding Properties of Comminuted Turkey Breast and Thigh: Effects of Initial pH 总被引:1,自引:0,他引:1
The effect of pH on properties of comminuted turkey breast and thigh was investigated by adding acid or base during chopping or dialyzing meat batters against buffers. Cooking yield was a function of meat pH and independent of pH-adjustment method. Thigh meat gels (pH 6.4) had higher cooking yield, held-water, and shear stress and shear strain at failure than breast meat gels (pH 5.9). Functional properties of breast meat adjusted to pH 6.4 during chopping were similar to those of thigh, whereas thigh adjusted to pH 5.9 remained different from breast. Rheological properties of breast meat gels did not increase when pH was adjusted by dialysis, suggesting that pH during chopping is important to rheological properties. 相似文献