With the increase in drilling fluid density requirements low-pressure coefficient formations, traditional hollow bead fluids and foam each have different degrees of deficiencies. Through extensive indoor experiments, an amphoteric surfactant (cocoamidopropyl betaine) with better foaming performance was selected to formulate ultra-low-density that combines a agent glass microbeads reduce fluid, ...

Foam glass is a kind of green building material that widely used because its excellent thermal insulation and mechanical properties. In this study, the borosilicate foam was fabricated by powder sintering method using recycled soda lime waste glass, quartz, borax as primary raw materials. CaCO3 foaming agent Na2CO3 flux agent. Results showed quartz content decreases from 30 to 17.5 wt.% increas...

In this study, we aim to improve the fire resistance performance by solving structural problem so that gas or flame does not leak through door in case of a while maintaining airtightness and insulation when removing threshold at bottom general door. To along with fire-resistance, an ordinary auto-bottom is provided lower part However, there limit securing fire-resistance. maximize fire-resistan...

shampoos are products which remove surface grease and dirt from the hair shaft and scalp. the cleansing or detergent action of a shampoo is a primary function. however, the foaming characteristic of a shampoo has an important role in its acceptability. often alkanolamides are used for the formation of a stable foam; but because of producing nitrosamines, they are potentially carcinogenic compou...

in this study, the microstructure and properties of foam glass obtained as a result of the interaction of the waste glass with sic as the foaming agent and fe2o3 as the oxidizing agent have been investigated using scanning electron microscopy (sem), as well as three-point bending and pycnometery tests. first, the temperature and optimized amount of sic for making foam glass was determined. the ...

Foaming properties of dilute aqueous nonionic fluorinated surfactants, perfluoroalkyl sulfonamide ethoxylate, C8F17SO2N (C3H7)(CH2CH2O)nH (abbreviated as C8F17EOn, n = 10, 20) has been studied at 25°C. Both the surfactants produced a large volume of foams that are stable for several hours to a few days depending upon the surfactant concentration. The foam stability increases with increasing the...

Systematic experimental study of the physico-chemical factors controlling the foaming and defoaming performance of several Pluronic nonionic block copolymers is performed in solutions of sodium caseinate. Dynamic light scattering measurements and microscopic observations confirm that a significant defoaming is observed above the cloud point of the nonionics, which is almost independent on the p...