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75results about How to "Reduced uptake" patented technology

Preparation method of special composite coating diaphragm for lithium battery

The invention discloses a special composite coating diaphragm for a lithium battery. The special composite coating diaphragm comprises a microporous membrane, resin layers, ceramic layers and acrylicadhesive layers; the special composite coating diaphragm is characterized in that the resin layers coat the upper surface and the lower surface of the microporous membrane; one ceramic layer coats theouter side of each resin layer; one acrylic adhesive layer coats the outside of each ceramic layer; first micropores are formed in the microporous membrane; second micropores are formed in each resinlayer; third micropores are formed in each ceramic layer; and fourth micropores are formed in each acrylic adhesive layer. A preparation method of the special composite coating diaphragm for the lithium battery comprises the following steps of surface modification of boehmite alumina, preparation of the microporous membrane, preparation of a polymer composite membrane, preparation of modified boehmite alumina slurry, coating of the modified boehmite alumina slurry and bonding forming of an acrylic adhesive, thereby obtaining the special composite coating diaphragm for the lithium battery. According to the composite coating diaphragm, the security problem of a high-energy density battery core can be well solved.
Owner:桑顿新能源科技(长沙)有限公司

Liquid absorption fiber

The invention aims to provide a liquid absorption fiber. The fiber comprises a polymer represented by the following structural form shown in the description, wherein R is at least one selected from a group consisting of -NH2, -OCH2CH2OH, -OCH2CH2CH2OH, -OH, -ONa, -OK and -OCa; m, n and p respectively represent the quantity percentages of corresponding repeating units in a polymer molecule, and meet the following relational expression: m+n+p=1, p/(m+n+p)=0.05 to 0.30; when the degree of substitution D is defined to be m/(m+n+p): the total degree of substitution of the fiber Ds is 0.09 to 0.8, and the value of the degree of substitution Do of the polymer at the center point of the cross section of the fiber/the degree of substitution Dx of the polymer on the edge of the cross section of the fiber is 0 to 0.98. By the use of a simple process, the antibacterial performance, the liquid absorption property and the like of the fiber are improved by controlling the proportions of the repeating units with different substituent groups in the polymer contained in the fiber and enabling the degree of substitution of the outer side (edge) of the fiber to be greater than that of the inside (center) of the fiber; the fiber suitable for clinical application, particularly applicable in the aspects such as hemostasis, burns and chronic wound treatment, is provided.
Owner:JIANGSU NEWVALUE MEDICAL PROD CO LTD +1

Method for determining alternating injection time of polymer flooding

The invention discloses a method for determining alternating injection time of polymer flooding. The method comprises the step of determining injection time 1, injection time 2 and injection time 3 according to the changes of moisture content and shunt rate of an oil-displacement system in a high-permeability layer, wherein the injection time 1 is a corresponding period when the moisture content of output liquid reaches a certain value, the injection time 2 is a corresponding period when the shunt rate of the oil-displacement system in the high-permeability layer is suddenly changed, and the injection time 3 is a corresponding period when the shunt rate of the oil-displacement system in the high-permeability layer is in a rising trend and becomes flat. According to the method, the viscosity of a new oil-displacement system corrected to be injected in the injection time 1 is larger than that of the injected oil-displacement system, the viscosity of a new oil-displacement system corrected to be injected in the injection time 2 is smaller than that of the oil-displacement system corrected to be injected in the injection time 1, and the viscosity of a new oil-displacement system corrected to be injected in the injection time 3 is smaller than that of the oil-displacement system corrected to be injected in the injection time 2; and different oil replacement effects of chemically flooded heterogeneous reservoirs can be achieved, and the development degree of a low-permeability layer is improved.
Owner:CHINA NAT OFFSHORE OIL CORP +1

Medical non-woven fabric with high permeability

The invention discloses a medical non-woven fabric with high permeability. The medical non-woven fabric is characterized in that base cloth is prepared by modified alginate fibers and viscose fibers,and the base cloth is prepared by finishing through a finishing liquid; a mass ratio of the modified alginate fibers to the viscose fibers is 1: 2-3; the non-woven fabric is prepared by the followingsteps of step 1, mixing the modified alginate fibers and the viscose fibers according to the mass ratio, carrying out opening, impurity removal and net forming on blowing-carding equipment and obtaining the base cloth on a non-woven needled sample weaving machine; and step 2, carrying out finishing on the base cloth in the finishing liquid to obtain the non-woven fabric. According to the medical non-woven fabric, the non-woven fabric prepared by mixing the modified alginate fibers and the viscose fibers is used as the base cloth, the modified alginate fibers and the viscose fibers have excellent air permeability and skin friendliness, and are made in a weaving mode, so that the obtained base cloth has extremely high air permeability; the base cloth is finished through the special finishingliquid, so that the antibacterial property and softness of the non-woven fabric can be effectively improved; and the high-permeability non-woven fabric with the excellent antibacterial effect is obtained and is suitable for the medical field.
Owner:安徽弋尚纺织科技有限公司
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