Peptizing agents

Peptisator, m. peptizer, peptizing agent, peptisch, a. peptic, peptisieren. v.t. peptize. 

Hydrothermal synthesis of titanium dioxides using acidic and basic peptizing agents and their photocatalytic activity on the decomposition of orange II... 

Add a bridge-builder and a peptization agent into this mixture, followed by 30 minutes of stirring to form the catalyst ink. 

This depends on the polymer type and increases with higher dry filler loading and reduces with peptizing agents, plasticizers, softeners, reclaimed rubber or resins. 

The fact that plasticization of rubber in the mixing mill is the result of oxidation implies that oxygen is indispensable for the same. Agents which accelerate oxidation thereby effecting plasticization to a desired mooney viscosity level are called peptizing agents. 

Shaw et al. (2000) How do Fe and P associate with natural DOC of different molecular weight fractions HMW DOC acts as peptizing agents for inorganic colloids of Fe and P. 

FIGURE 5 Schematic representation of DOM-Fe-P complexes. (A) DOM as a peptizing agent surrounding an inorganic Fe colloid with associated P. (B) Associated Fe hydroxide acting as a metal bridge to bind P04. The Fe may be mono- or polynuclear in nature, as denoted by the X subscript. 

Sols are obtained via either colloidal or polymeric routes. In the first method, colloids are formed and stabilized by adding peptizing agents (acidic or basic electrolytes) to metal hydroxides, and the gel is obtained by evaporating the solvent. In the second (polymeric) method, alkoxides are used as starting materials and hydrolysis and condensation reactions control the size of the resulting clusters (temperature and pH are the critical parameters). Additives such as surfactants may also play an important role in the sol characteristics by controlling the hydrolysis step of the alkoxides [25]. 

A water-soluble blue can be manufactured by adding peptizing agents (the latter improve the water solubility via an emulsifying action). This forms a transparent colloidal solution in water without the use of high shear forces [3.172]. 

Yamanaka T, Fukumori Y (1995) Molecular aspects of the electron transfer system which participates in the oxidation of iron by Thiobacillus ferrooxidans. FEMS Microbiol Rev 17 401-413 Yanagisawa K, Ovenstone J (1999) Crystallization of anatase from amorphous titania using the hydrothermal technique Effects of starting material and temperature. J Phys Chem B 103 7781-87 Yang J, Mei S, Ferreira IMF (2000) Hydrothermal synthesis of nanosized titania powders lirfluence of peptization and peptizing agents on the crystalline phases and phase transition. J Am Ceram Soc 83 1361-1368... 

Endor [Du Pont]. TM for a rubber peptizing agent containing activated zinc salt of pentachlo-rothiophenol. (C6Cl5S)2Zn and 80% inert filler. 

In sol-gel processing, particulate sols of hydrous metal oxides can be formed using a peptization reaction to prevent aggregation of the primary particles. This is the case for y-alumina obtained from boehmite. Usually mesoporous membranes with a pore diameter down to 5 nm are easily elaborated from commercial boehmite using nitric acid as the peptization agent. Larbot et al. [53]... 

The viscosity of barium sulfate suspension is determined by the quantity and size of particles and can be modified by added peptizing agents (52). A thick paste of barium sulfate in water can be peptized or thinned by the addition of sodium citrate and sorbitol. The function of the citrate is to stabilize the colloidal... 

---