Summary coagulation effect of polyaluminium chloride need to rely on the outside world what conditions? Summary coagulation effect of polyaluminium chloride need to rely on the outside world what conditions? Polyaluminum chloride coagulation of the external conditions (such as temperature, force, electrolyte or chemical reaction) changes in the system from solution or sol into a special semi-solid state that gel. Also known as jelly, first, the gel and sol (or solution) are very different. The colloidal particles or macromolecules in the sol or solution are independent units of motion and are free to move so that the sol has good fluidity. Gel is not, the dispersed phase particles connected to each other, the formation of the structure within the system, the liquid package in which, with the formation of the gel, the system not only lost mobility, but also shows the mechanical properties of solids, such as a certain elasticity, Strength, yield value and so on. Second, the gel and the real solid is not exactly the same, which consists of solid-liquid two-phase, belonging to the colloidal dispersion system, the total structural strength is often limited, easy to suffer changes. Change the conditions, such as changing the temperature, medium composition or external force, often make the structure damage, irreversible deformation occurs, resulting in the flow. Thus, the gel is a special form of dispersion system, the nature of the general between the solid and liquid. Polyaluminum chloride manufacturers have done experiments and found that some polymers are flexible linear macromolecules, such as watercress adsorption Yangmo monolayer adsorption, and then converted to multi-molecular layer adsorption, vulcanized rubber in benzene vapor adsorption is from The beginning is multilayered adsorption. The gel of this type of gel is heated and dissolved in water and then gels into a gel during the cooling process. Such as gelatin, cellulose, etc., in water or water vapor adsorption occurs. Different adsorption systems have different shapes of adsorption isotherms. The adsorption and analysis of elastic gels usually form a narrower lag circle. By the rigid particles such as SiO2, TiO2, V2O5, Fe2O3, etc., the gel formed by the sol belongs to non-elastic gel, also known as rigid gel. Most of the inorganic gel, due to the particle itself and the skeleton is rigid, very little activity, so the gel absorbs or releases liquid volume changes when their own small, non-intumescent. Often, such gels have a porous structure, and the liquid can be absorbed by it as long as it is wetted, ie there is no choice of absorption. Such gel dehydration drying and then placed in water heating generally do not form the original gel, can not form the gel to produce a sol, so this gel is also known as irreversible gel. The opposite of the thixotropic effect is a negative thixotropic effect. The basic holding point of this system is that the viscosity of the system increases under the influence of external force (shear force or shear rate), but the viscosity returns to its original state after standing for a period of time, and the hysteresis group appears clockwise. Obviously, the phenomenon of negative thixotropy is exactly the opposite of thixotropy, which is a thick phenomenon with time factor. Most systems with negative thixotropy are polymer solutions. For example, SiO2, sodium montmorillonite and other suspensions added polymer solution, such as polyaluminum chloride hydrolysis solution, under certain conditions, a negative thixotropic effect. This information is provided by an exclusive arrangement Source of the filter water purifier, for transfer, please indicate the way address http://www.gyzhenyu.com/ Molecular size of the mixture solution through the gel particles packed column, The higher the price of polyaluminum chloride, the smaller the molecular size of the basic aluminum chloride in the composition, the smaller the chance of the smaller molecules entering the network, the longer the time spent in between. Conversely, larger molecules are less likely to enter the network and can not even enter the network, leaving only the gaps between the gel particles.