223results about How to "Good film-forming properties" patented technology

The invention belongs to the technical field of a lithium ion battery, and particularly relates to an electrolyte applicable to a silicon carbon negative and a lithium ion battery comprising the electrolyte. The electrolyte comprises an electrolyte lithium salt, a non-aqueous organic solvent and an additive. Wherein the additive comprises a negative film formation additive, a fluorine-substitutedphenyl isocyanate compound additive with a formula I structure and a dosilane nitrogen-based compound additive. Compared with the prior art, the actual discharging capability, the cycle stability andthe high-temperature storage performance of a silicon carbon negative electrode lithium ion battery are effectively improved by means of a synergic effect generated by combined application of variousadditives, gas generation is prevented, the problems of volume expansion and pole plate pulverization of the battery during the charge-discharge process are solved very well, and meanwhile, the electrolyte is compatible with relatively good high- and low-temperature performance.

The invention provides a self-cleaning film agent for exterior wall paint, a preparation method and an application method thereof. The preparation method for the self-cleaning film agent is mainly characterized in that: the preparation method comprises the following steps of: taking nanometer titanium oxide composite collosol as a reference; dispersing the collosol in an alkaline aqueous solution after adding an anionic surfactant or a non-ionic surfactant with a mass percent of between 0.1 and 10 to form a transparent and stable dispersion system; and finally adding a certain number of film forming substances into the system to obtain the self-cleaning film agent for the exterior wall paint. The self-cleaning film agent is applied to the surface of the exterior wall paint for secondary coating through a spray coating method or a roller coating method or a brush coating method, and a film is formed at a normal temperature, thereby forming a multifunctional coating with stain and ultraviolet irradiation resistance and air cleaning performance on the external surface of the paint. As the method has the obvious advantages of good performance, simple process, convenient construction, durable effect, environmental friendliness, etc., the method can be applied to various exterior wall paints in a large scale.

The invention relates to a method for separating corncob cellulose by using ionic liquid. According to the invention, an ionic liquid 1-allyl-3-methylimidazole chlorine salt is synthesized with raw materials of allyl chloride and 1-methylimidazole; and with the high solubility of the ionic liquid upon cellulose, the ionic liquid is used for separating and extracting cellulose in corncob. The method comprises the steps of corncob pretreatment, lignin removing, cellulose separation, cellulose extraction, and the like. The extraction rate of corncob cellulose is approximately 18.35%. With the method, the purity of the extracted corncob is high, and the film-forming property of the cellulose is good. According to the invention, a green solvent which is the ionic liquid is used as a dissolving medium. The solvent can be recovered and reused, such that the requirement of green production is satisfied.

The invention discloses a surface self-cleaning carbon nitride Fenton-photocatalytic nanofiltration membrane and a preparation method thereof and belongs to the fields of water treatment membrane materials and preparation processes of the water treatment membrane materials. The method comprises selecting carbon nitride photocatalysts which integrate plasticity of polymer molecules and chemical stability of carbon materials and performing surface modification, chemical modification, Fenton-like agent compounding and the like to prepare a multifunctional water treatment membrane. On the one hand, inter-element triangular nanopores formed by carbon nitride can provide stable natural channels for rapid passage of water molecules; on the other hand, through irradiated catalytic degradation andiron-containing agent Fenton-like oxidation, in-situ degradation of nanofiltration retained pollutants can be achieved. The surface self-cleaning carbon nitride Fenton-photocatalytic nanofiltration membrane provides a new way for solving the problem of membrane contamination difficult for traditional nanofiltration membrane materials and has the advantages of being simple in preparation method, low in cost, resistant to pollution, low in water mass transfer resistance and the like, thereby being applicable to application to the field of water purification.

The invention provides a high-energy-density lithium-ion battery electrolyte prepared from, by weight, 20-60% of lithium salt, 20-60% of a non-aqueous organic solvent and 0.5-10% of an additive, all the components adding to 100%. The lithium salt includes lithium hexafluorophosphate, lithium bifluorosulfonimide and lithium sulfate difluoroborate. The electrolyte is very short in self-extinguishingtime and is even incombustible, wherein the additive has excellent film-forming effect, so that an SEI film, having ultralow resistance and high thermo-stability, can be formed between cathode-anodeinterfaces.

The invention discloses a method for producing an organic electroluminescence device. The method comprises the followings steps: frirstly, conducting polymer or conducting polymer nano-particle composite materials are formed on the anode of a device, and are used as the hole injection layers of the device; and secondly, other functional layers and membrane electrodes of the device are produced. The conducting polymers in the hole injection layers include conducting polymers and nano-particles thereof, and the device has the characteristics of high electrical conductivity and good membrane planeness. The method can not only be used for producing the organic electroluminescence device with the advantages of high luminous efficiency and long service life, but also can be applied to the fields of backlights, luminance light panels, and the like for color LED display.

The invention discloses a polyimide film. The glass transition temperature is 360 to 380 DEG C, the tensile strength is 200 to 220 MPa, and the average linear expansion coefficient within the range of50 to 300 DEG C is 18 to 20 ppm/K; the chemical component of the polyimide film is polyimide, and the structural formula of the polyimide is as shown in the following formula I (the formula I is as shown in the description), wherein n and m represent the polymerization degree of the polymer, m to n is 3-1 to 17-3, and n is an arbitrary positive integer. The polyimide has excellent film-forming characteristic, the polyimide film has superhigh heat resistance and mechanical strength, particularly the polyimide film has the average linear expansion coefficient nearly close to that of a copper foil within a certain high temperature range.

The invention provides a polyvinyl alcohol anion-exchange membrane and a preparation method thereof. The polyvinyl alcohol anion-exchange membrane is prepared from quaternary polyvinyl alcohol, polydimethyldiallylammonium chloride, tetraethoxysilane and a cross-linking agent, wherein the weight ratio of the quaternary polyvinyl alcohol to the polydimethyldiallylammonium chloride is 1: (0.1 to 0.6). The polyvinyl alcohol anion-exchange membrane prepared by the preparation method provided by the invention is good in selective adsorption and high in adsorption capacity for chromium ions, free from secondary pollution after adsorption, as well as environment-friendly in raw materials and preparation process.