48results about How to "Strong electrostatic interaction" patented technology

The invention relates to a preparation method and application of a double-modified ultrafiltration membrane of hydrophilicity and antibacterial properties. The invention belongs to the technical field of ultrafiltration membranes and aims to solve the problem that the existing ultrafiltration membrane materials are difficult to achieve double modification of hydrophilicity and antibacterial properties at the same time. Preparation method: add condensing agent and 3-dimethylaminopropylamine to the graphene oxide suspension to react, add the cleaned reactant and long-chain halogenated alkanes into an organic solvent, and fully react at 20-80°C for 8-24 hours , to obtain a quaternized graphene oxide modifier; 2. Add the quaternized graphene oxide modifier to an organic solvent for ultrasonic dispersion to obtain a GO-Q suspension, and dissolve the polymer membrane matrix material and the membrane modifier into the GO-Q suspension to obtain a uniform casting solution and cast it into shape. The invention prepares the ultrafiltration membrane with dual functions of hydrophilicity and antibacterial through the immersion precipitation phase inversion method, and the modified ultrafiltration membrane shows better mechanical performance, water treatment performance, hydrophilicity and antibacterial performance.

The invention discloses a Mo0.5W0.5S2 nano-tile / graphene electrochemical sodium storage composite electrode and a preparation method thereof, wherein an electrochemical sodium storage active substance is a Mo0.5W0.5S2 nano-tile and graphene composite nanomaterial; the ratio of the amount of substance of Mo0.5W0.5S2 nano-tile to graphene in the composite nanomaterial is 1: 2; the Mo0.5W0.5S2 nano-tile has few layers and averagely has 3-5 layers; the composite electrode comprises the following components by weight percent: 80% of the Mo0.5W0.5S2 nano-tile / graphene composite nanomaterial, 10% of conductive acetylene black, 5% of carboxymethyl cellulose and 5% of polyvinylidene fluoride. The preparation method comprises the steps of firstly, preparing the Mo0.5W0.5S2 nano-tile / graphene composite nanomaterial, mixing the obtained composite nanomaterial with the acetylene black and the polyvinylidene fluoride to prepare paste, coating a copper foil with the paste, and rolling to obtain the electrochemical sodium storage composite electrode. The electrochemical sodium storage composite electrode has the high electrochemical sodium storage capacity.

The invention discloses an electrochemical sodium storage composite electrode with high capacity and cycle stability and a preparation method. The electrochemical sodium storage active substance is a MoS2 nano tile / graphene composite nano material; the substance amount ratio of the MoS2 nano tile to graphene in the composite nano material is (1 to 1)-(1 to 13); the MoS2 nano tile is of a few-layer layered structure, and the average layer number is 4; the composite electrode comprises the following components by weight percent: 80% of MoS2 nano tile / graphene composite nano material, 10% of acetylene black, 5% of carboxymethyl cellulose and 5% of polyvinylidene fluoride. The preparation method comprises the following steps: preparing a MoS2 nano tile / graphene composite nano material, and blending the MoS2 nano tile / graphene composite nano material with acetylene black and polyvinylidene fluoride to obtain a paste; smearing the paste on a copper foil serving as a current collector; and performing vacuum drying and rolling to obtain the electrochemical sodium storage composite electrode. The MoS2 nano tile / graphene electrochemical sodium storage composite electrode disclosed by the invention has high reversible sodium storage capacity and wide application prospect.

The invention discloses a method for preparing a continuous glass fiber reinforced polypropylene unidirectional prepreg tape, comprising: 1) uniformly mixing polypropylene, a polypropylene-based ionomer and an antioxidant, heating and melting to obtain a melt mixture; 2) The continuous glass fiber is drawn out from the creel, flattened, and then enters the corona charging device, so that the continuous glass fiber is charged with the opposite charge to the polymer chain of the polypropylene-based ionomer; 3) after being treated in step 2) The continuous glass fiber is coated with melt mixture, kneaded and impregnated, calendered and impregnated, cooled and shaped, and rolled. The invention also discloses the continuous glass fiber reinforced polypropylene unidirectional prepreg tape prepared by the method. The product prepared by the invention has the characteristics of sufficient impregnation of polypropylene to continuous glass fiber, low porosity, good interface bonding, excellent mechanical properties, and no release of small molecule volatiles during subsequent processing and use, and can be used for continuous fiber reinforced polypropylene Sheet, plate and special-shaped structural parts and other fields.