51results about How to "Grafting is firm" patented technology

The invention discloses a preparation method of dye-absorption fibers. The preparation method of the dye-absorption fibers comprises the steps that a cationic cellulose ether aqueous solution with the concentration of 5g / L-100g / L is prepared, an alkali compound is added to the cationic cellulose ether aqueous solution to adjust the pH value to be 11-13, viscose is put into the cationic cellulose ether aqueous solution to be reacted for 15-60 minutes at the temperature of 80-100 DEG C, and poly quaternary ammonium salt viscose is obtained; the poly quaternary ammonium salt viscose is taken out and dried, and then the dye-absorption fibers are obtained. The invention further provides a preparation method of dye-absorption non-woven cloth. The preparation method of the dye-absorption non-woven cloth comprises the steps that the dye-absorption fibers are provided; lapping is carried out on the dye-absorption fibers; net fixation is carried out on the dye-absorption fibers after lapping, and the cloth is obtained. By means of the preparation method of the dye-absorption fibers and the preparation method of the dye-absorption non-woven cloth, dye-absorption non-woven cloth with high absorption force and tearing resistance can be prepared.

The invention belongs to the technical field of material modification, and specifically relates to a method for reinforcing lipophilic modification of polypropylene fibers, which uses molecular self-assembly technology and chemical graft copolymerization technology to strengthen the lipophilic performance of polypropylene fibers. The method comprises the following steps: 1) performing sulfuric acid immersion treatment on raw material polypropylene fibers to obtain microporous polypropylene fibers; 2) performing gradient hydrogen peroxide solution immersion treatment on microporous polypropylene fibers to obtain hydroxyl-modified polypropylene fibers; Assembled to obtain amino-modified polypropylene fibers; 4) based on chemical graft copolymerization technology, combined with silane coupling agent, to obtain reinforced lipophilic modified polypropylene fibers. The invention improves the affinity performance and storage function of the interface to the organic phase by reserving microporous structure and grafting hydrophobic hyperbranched polymer on the surface of the polypropylene fiber, and obviously improves the lipophilic property of the polypropylene fiber.

The invention relates to the technical field of nanocomposite materials, in particular to a nanoparticle sandwich composite material and a preparation method thereof, which consists of the following raw materials in parts by weight: 40-50 parts of diisocyanate; alcohol containing epoxy groups 120‑180 parts; 5‑10 parts of single-walled single-walled carbon nanotubes; 15‑35 parts of electrode materials. The present invention oxidizes single-wall carbon nanotubes to obtain oxidized single-wall carbon nanotubes with a large amount of carboxyl groups on the surface. The present invention also prepares polyurethane prepolymers containing epoxy groups, and then combines the polyurethane prepolymers with After the oxidized single-walled carbon nanotubes undergo amidation reaction, the polyurethane prepolymer surrounds the single-walled carbon nanotubes, and then the electrode material is adhered on the polyurethane prepolymer. The present invention uses the polyurethane prepolymer and the single-walled carbon nanotube Carbon nanotubes work together to increase the rate of charge and discharge, and efficient energy storage is achieved through single-walled carbon nanotubes and transition metal oxides.

The invention discloses a preparation method of a novel grafted dendrimer microsphere, and provides a preparation method of the first generation (1.0G) dendrimer grafted ion chromatography stationary phase, including: 1.0G dendrimer Preparation of macromolecules, preparation of polystyrene divinylbenzene microspheres, grafting of dendrimers and microspheres, quaternization modification of dendrimers and grafted anion chromatography of quaternized dendrimers Preparation of filler. The method makes full use of the branched structure of the dendritic macromolecule to modify the surface of the microsphere, has the advantages of fast reaction, short period, simple method and excellent performance of the synthesized filler.

The invention relates to a non-woven fiber material for medical and health protection and its production process. The non-woven fiber material is a modified polypropylene fiber; the modified polypropylene fiber is made of surface-functional coral powder. Propylene modification is obtained, and the mass ratio of surface functional coral powder to polypropylene is 1:15 to 35; the preparation method of the surface functional coral powder is as follows: step 1, firstly, coral sand is polished into coral fine powder, and then The coral fine powder is subjected to amino treatment to obtain a coral powder amino-treated product; step 2, using the coral powder amino-treated product to perform grafting reaction with luteolin to obtain a surface-functional coral powder. The invention prepares and synthesizes a modified polypropylene fiber with strong hygroscopicity and antibacterial property by hydrophilically modifying the hydrophobic polypropylene fiber.

The invention provides a method for preparing hydrophobic silica by virtue of fumed silica. The method comprises the following steps: performing a reaction between fumed silica and vinyl silicone oilto prepare silicon dioxide containing vinyl; mixing silicon dioxide with a mixture of methyl silicone oil and a Karstedt catalyst; adding tetramethyldisiloxane to react to obtain modified silicon dioxide; and finally, adding alpha-olefin to react, so as to obtain hydrophobic silica. According to the method, the treatment of hydroxy on the surface of fumed silica is relatively thorough; long-chainalkyl is grafted to the surface of fumed silica, so that the grafting rate is high, obtained long-chain alkyl surface-modified silicon dioxide has good hydrophobicity and hydrophobic stability and further has good consistency with organic matters (including materials mainly containing carbon chains).