Relationship between bridging flocculation and optimization of slip resistance of hydroxypropyl starch ether

Shandong chuangyao Biotechnology Co., Ltd. has studied hydroxypropyl starch ether for many years. The test and analysis method of anti sagging performance of HPC as building additive in cement mortar is explained.

The anti slip optimization of hydroxypropyl starch ether should start from the low content (%), and attention should be paid to the effect of moderate increase in the amount of hydroxypropyl starch ether on the yield value / slip. If there is a significant improvement in yield value / slip, it indicates that there is a steep slope. In the process of observing how the slope gradient changes, the addition amount of hydroxypropyl starch ether can be further increased until the maximum bridge is reached. On the other hand, when the% addition of additive leads to poor yield / slip, the same method is used to reduce the addition by% and track its effect on slope until the maximum bridging is reached.

To highlight such a means of optimizing the slip / sag resistance of hydroxypropyl starch ethers, please note that the parabolic nature of the measured values means that two (almost) identical slip values can be measured (as shown by the elliptical "equal slip" line between the two black marks on the x-axis) when the addition% is significantly different. The potential danger in this case is that if a poor slip value is measured at a low level of% (the first black mark) and a poor slip value is obtained at a higher dosage% outside the maximum bridging area, it is easy to conclude that the additive is not suitable for providing good anti slip performance, even if this is not necessarily the case (when the average molecular weight This situation becomes more and more troublesome when there is more and more competition between different additives for adsorbing on the particle surface, because the range of maximum bridging becomes narrower). However, it is possible to determine the range of the best bridging flocculation by effectively extracting the samples with different amounts of% and detecting the effect of small increments in different regions, so as to obtain the best anti slip / anti sagging results of hydroxypropyl starch ether.

Through the test verification, the hydroxypropyl starch ether produced by Shandong chuangyao Biotechnology Co., Ltd. is very significant in anti sagging performance, and the ideal effect can be achieved with very small amount of addition.