6 results about "Surface concentration" patented technology

A method for estimating surface concentrations of gas in a drilling fluid in use in a drilling rig includes measuring gas-out or gas-in concentrations while drilling a wellbore and processing the gas-out measurements or the gas-in measurements with a calibrated model to estimate corresponding gas-in concentrations or gas-out concentrations.

This application relates to a method for determining the bending deformation of flat glass. The method determines the radius of curvature of the flat glass corresponding to its bending deformation based on the Stony relation and / or a relation based on the elastic-plastic deformation rate that reflects the setting of the width change. The Stony relation includes a first layer and a second layer, defined as follows: based on the integral value of the concentration distribution of the ion-exchange depth layer after ion exchange of alkali-containing glass and the depth calculated with the same area under the assumption of the same surface concentration along the depth direction (i.e., the effective diffusion length), the thickness of the flat glass corresponding to the effective diffusion length is considered as the first layer, and the thickness of the flat glass excluding the effective diffusion length is considered as the second layer. The plastic deformation rate included in the elastic-plastic deformation rate relation is based on the shape change caused by the structural mitigation effect due to α-relaxation, based on the width change that occurs after ion exchange in the flat glass. The average of the width change gradually changing with concentration in the ion-exchange depth layer is considered as a single value. Using a purely geometric method, it is assumed that the width change occurs from half the depth of the ion-exchange depth layer to half the depth of the non-ion-exchange layer, and this is defined as plastic curvature occurring with the width change.

There is a very good linear relationship between the absorptivity (A) of a fabric sample to UV-Vis light and the surface concentration C of an antimicrobial agent on the fabric sample. On this basis, provided in the present invention is a method for estimating antimicrobial efficacy of a fabric sample, the method comprising: preparing antimicrobial agents of different concentrations (C), and respectively applying the antimicrobial agents to different fabric sheets to obtain fabric samples; measuring the absorptivity (A) of the fabric samples to radiation of a certain wavelength; measuring antimicrobial rates (y) of the fabric samples, to which the antimicrobial agents of different concentrations (C) are applied, against a certain microorganism; and fitting the antimicrobial rates (y) of the fabric samples and the absorptivity (A) of the fabric samples to radiation of a certain wavelength, so as to obtain a relationship between the antimicrobial rates (y) and the absorptivity (A) of the fabric samples to radiation of the wavelength, wherein the antimicrobial rate (y) of the fabric sample to be tested can be calculated by using the relationship between the antimicrobial rates (y) and the absorptivity (A) of the fabric samples to radiation of the wavelength and on the basis of the absorptivity (A1) of the fabric sample to be tested to radiation of the wavelength.

This invention relates to the field of polymer surface treatment and functional modification technology, specifically to a resin anti-aging treatment method based on ultraviolet absorption gradient distribution. It includes the following steps: S1: preparing a gradient coating solution; S2: high-concentration initial coating, gradient transition treatment, low-concentration touch-up coating, and complete curing. A continuous gradient distribution is achieved: through a specific sequence of "high-concentration initial coating → transition treatment → low-concentration touch-up coating," combined with low-temperature pre-curing control at 40-60℃, a continuous concentration gradient of the ultraviolet-absorbing functional components from the surface to the interior is successfully constructed. The surface concentration is high, and the interior concentration is low, with mutual solubility between layers and no clear interface. Strong surface ultraviolet resistance: the concentration of ultraviolet absorber in the 0-50μm region of the surface is 3-10 times that of the interior region, efficiently absorbing ultraviolet light entering the surface and protecting the deeper resin from damage. High internal transparency: the internal ultraviolet absorber content is low, and the resin transmittance is ≥90%, avoiding the scattering and absorption of visible light by additives in uniformly distributed solutions.

The present invention provides a galvanized steel sheet including a base steel sheet and a galvanized layer arranged on the surface of the base steel sheet, wherein the base steel sheet has a chemical composition including, based on mass %, Ni: 0.010 to 1.000%, Cu: 0.010 to 1.000%, and Sn: 0.003 to 1.000%, and in an elemental distribution image obtained by measuring a cross-section of the galvanized steel sheet with EPMA, the surface coverage of the area covered with a surface concentration of at least one of Ni, Cu, and Sn satisfying [Ni]+[Cu]+0.6[Sn]≥10 and with a surface concentration of Fe of 10 mass % or more is 25% or more, and the average length of the uncovered area not covered by at least one of Ni, Cu, and Sn is 10 µm or less, and the portion covering the galvanized steel sheet.