46results about How to "Strong positive" patented technology

The invention relates to a modified bentonite load nanometer iron material and a preparation method thereof. According to the technical scheme, the preparation method includes the steps of stirring bentonite and bivalent iron salt solutions to prepare the mixed liquor of the bentonite and the bivalent iron salt solutions, wherein the mass ratio between an iron element and the bentonite is 1: (1-2), then dropwise adding reducing agent solutions to the mixed liquor of the bentonite and the bivalent iron salt solutions and stirring to prepare mixed liquor containing bentonite load nanometer iron, and adding alkyl quaternary ammonium salt solutions into the mixed liquor containing the bentonite load nanometer iron and stirring, wherein the volume ratio between the mixed liquor containing the bentonite load nanometer iron and modifying agent solutions is 1: (0.15-0.20), and the steps are all carried out in a nitrogen environment; then carrying out suction filtration, drying and grinding the obtained solid in a vacuum environment to obtain the modified bentonite load nanometer iron material. The modified bentonite load nanometer iron material prepared by the preparation method has strong reducing capacity and adsorption capacity, and is suitable for removing heavy metal chromium (VI) and heavy metal arsenic (V), wherein the heavy metal chromium (VI) and the heavy metal arsenic (V) exist in water in an anionic form.

The invention relates to the field of pharmaceutical excipients and preparations, in particular to an oligopeptide cationic lipid derivative (I) or (II), a preparation method thereof and application thereof as a drug carrier in preparations such as lipids and micelles. The cationic lipids has high buffering capabiity, can generate the effects of proton sponge in acidic lysosomes, and can be compounded with plasmid DNA (Deoxyribonucleic Acid), oligonucleotides and small interfering substances (siRNA) into nanoparticle compounds.

The invention discloses tea saponin modified electrolytic manganese residues. The tea saponin modified electrolytic manganese residues are characterized by comprising 5wt%-7wt% of tea saponin, 2wt%-5wt% of NaOH and 88wt%-93wt% of electrolytic manganese residues. The tea saponin modified electrolytic manganese residues are prepared through the following steps: the electrolytic manganese residues and NaOH are added to a high-speed mixer at 25 DEG C and stirred for 6-7 min, tea saponin is added when the temperature reaches 65 DEG C, the mixture is heated and stirred for 5-6 min, and the tea saponin modified electrolytic manganese residues are obtained. A compound flooring tile prepared from the tea saponin modified electrolytic manganese residues and waste plastics is prepared from raw materials in parts by weight as follows: 20-30 parts of waste polyvinyl chloride plastics and 70-80 parts of the tea saponin modified electrolytic manganese residues through stirring, plastication into sheets, die pressing and cutting into sheets. The surface property of the modified electrolytic manganese residues is changed from hydrophilicity to lipophilicity by means of tea saponin, blending compatibility and binding performance of the modified electrolytic manganese residues with waste polyvinyl chloride are improved greatly, the performance of the compound flooring tile is improved greatly, filling parts of the electrolytic manganese residues in the compound flooring tile are increased, and product cost is reduced effectively.

The invention discloses an amino acid zwitter ion hydrogel material and a preparation method thereof. The amino acid zwitter ion hydrogel material is a product of an epoxy ring-opening reaction of a crosslinked polymer containing epoxy groups and amino acid, amino-acid ester or polypeptide containing primary amine groups or secondary amine groups, and has characteristics of zwitter ions when the pH value is about 7. The preparation method comprises the step of performing the epoxy ring-opening reaction on the crosslinked polymer containing the epoxy groups and the amino acid, amino-acid ester or polypeptide containing the primary amine groups or secondary amine groups under an alkaline condition that the temperature is 30-150 DEG C and the pH value is 8-14. The amino acid zwitter ion hydrogel material has the characteristics of hydrophilic property and bio-adhesion resistance, and can be used as a contact lens, a wound covering material, a tissue repair material, a drug carrier or water absorbent.

The invention relates to an asphalt mixture with high anti-rut capability, which is composed of the following materials by weight parts: 93.5-96.5 parts of mineral aggregates, 3.5-6.5 parts of asphalt and 0.175-0.65 parts of anti-rut agent. A preparation method for the asphalt mixture with high anti-rut capability is characterized in that the steps are as follows: (1), the asphalt is heated to 145-165 DEG C, and the mineral aggregates are heated to 150-180 DEG C; (2), 93.5-96.5% of mineral aggregates and 3.5-6.5% of asphalt are put into a mixer to be mixed, and the anti-rut agent with amount of 2-10% of asphalt is sprayed after the asphalt is put for 5-8s; and (3), after the anti-rut agent is sprayed in the step (2), the mixture is stirred for 10-15s, then mineral powder is added, the obtained mixture is stirred more than 15s continuously, thereby ensuring uniform stirring, so as to obtain the finished product (the asphalt mixture with high anti-rut capability). The asphalt mixture with high anti-rut capability is rich in raw materials, low in preparation cost, high in cost performance and strong in anti-rut capability; and the preparation process for the asphalt mixture is simple and easy, equipment is easy, and the preparation process is easy to realize.

The invention discloses positively charged nano yttrium oxide and a preparation method thereof. The isoelectric point of nano Y2O3 with positive charges on the surface is 8-10, the Zeta potential of the surface is 20-30mV when the pH is 7, and the average size of the nano Y2O3 particles is 20-80nm. In the invention, an alcohol-water mixture is used as a reaction solvent, homogeneous nucleation of a yttrium-containing precursor is promoted by use of the solubility difference of the reactant in two solvents, and nano Y2O3 with relatively strong electropositivity and relatively high isoelectric point is obtained through high-temperature thermal decomposition. The method comprises the following specific steps: preparing an alcohol-water mixture according to a certain ratio as a solvent; separately adding a yttrium-containing compound and a precipitator; heating for reacting for homogeneous nucleation to obtain a yttrium-containing precursor; filtering the yttrium-containing precursor, washing and drying; and performing high-temperature thermal decomposition under the protection of a nitrogen atmosphere in a tube furnace to obtain surface positively-charged nano Y2O3. The invention is simple in technology, low in cost and suitable for industrial production.

The invention relates to a guanidyl modified quaternary ammonium salt which has a following structural formula, wherein R1 is C8-C12 saturated straight-chain paraffin; R2 is equal to H or R1; and R3 is equal to H or CH3. The guanidyl modified quaternary ammonium salt has the advantages of higher positive electricity, obvious sterilizing effect, excellent killing effect special for fungus, excellent water solubility and excellent compounding property.