16results about How to "High positive charge density" patented technology

The invention discloses a moisture-conducting cool-feeling fabric for sportswear and a preparation method of the moisture-conducting cool-feeling fabric, and relates to the field of fabrics. When the moisture-conducting cool-feeling fabric for sportswear is prepared, zinc ions are loaded on porous nanometer aluminum oxide, then chloromethyl trimethoxy silane is grafted, and modified zinc-loaded nanometer aluminum oxide is obtained through a reaction with 2, 6-pyridine dimethyl carbinol and 3, 6-dichloro-4-vinylpyridazine; reacting dimethyl terephthalate, a modified monomer and ethylene glycol to obtain a modified polyester chip; uniformly mixing the modified polyester chips, the modified zinc-loaded nano aluminum oxide and polyethylene glycol 2000, and spinning to obtain spinning fibers; the preparation method comprises the following steps: reacting spinning fibers with hydrogen-containing silicone oil, weaving to obtain a precursor fabric, and reacting with 3-bromopropyl trimethyl ammonium bromide to obtain the moisture-conducting cool-feeling fabric for sportswear. The moisture-conducting cool fabric for sportswear prepared by the invention has excellent moisture-conducting cool, flame-retardant, antibacterial and mechanical properties.

The invention belongs to the technical field of textile fabrics, and particularly relates to an ultraviolet-proof antibacterial fabric and a preparation method thereof. The ultraviolet-proof antibacterial fabric comprises a base cloth layer and a modified polyester fabric layer, the modified polyester fabric is obtained by dipping a polyester fabric in a finishing liquid; the finishing liquid comprises a first finishing liquid and a second finishing liquid; the first finishing liquid is prepared from the following raw materials: a carboxymethyl chitosan derivative and polycarboxylic acid; the second finishing liquid is prepared by mixing nano titanium dioxide and absolute ethyl alcohol. According to the invention, the pre-treated polyester fabric is subjected to secondary surface modification by using the finishing liquid, and the durability of the fabric product is remarkably improved by using a covalent grafting mode.

The invention relates to the technical field of silicon dioxide, and discloses a cleaning material silicon dioxide for toothpaste and a preparation method thereof. The cleaning material silicon dioxide for the toothpaste is obtained by adding a nano-silicon dioxide modified polyethoxylene ether surfactant, quaternary ammonium salt modified chitosan modified nano-silicon dioxide particles and silica sol into a reactor and stirring. The silane coupling agent enables silicon dioxide particles to be more uniformly dispersed in the cleaning material, so that the contact area between the cleaning material and dirt is increased; hydrophobic groups of polyethoxylene ether molecules can be adsorbed to the surfaces of dirt particles, and a colloidal dispersion system formed by hydrophilic groups and water molecules can wrap the dirt particles and then wash away along with water flow. Silane coupling agent modified nano silicon dioxide and polyethoxylene ether play a synergistic effect, so that the cleaning effect is further improved; positive ions in the quaternary ammonium salt can adsorb negatively charged bacteria, so that dental plaque is reduced; and chitosan is grafted with quaternary ammonium salt, so that the positive charge density is improved, and the cleaning effect is further improved.

The invention relates to the field of membranes, and discloses a positively charged acid-resistant composite membrane as well as a preparation method and application thereof. The positively charged acid-resistant composite membrane comprises a bottom layer, a porous support layer and a polysulfonamide separation layer, wherein the polysulfonamide separation layer contains at least one quaternary ammonium salt structure as shown in a formula I; in the imgabs0 #, X is halogen, and R1, R2 and R3 are respectively and independently alkyl of C1-C8. The polysulfonamide separation layer of the positively charged acid-resistant composite membrane contains at least one quaternary ammonium salt structure with a specific structure, so that the composite membrane has high acid resistance and high rejection rate on high-valence metals.

The invention relates to the field of membranes, and discloses a positively charged composite nanofiltration membrane as well as a preparation method and application thereof. The nanofiltration membrane comprises a bottom layer, a porous support layer and a polyamide separation layer which are sequentially stacked, wherein the polyamide separation layer comprises a quaternary ammonium salt structure as shown in a formula I and / or a formula II; in the imgabs0 #, X is halogen; n is an integer from 0 to 10; and m is an integer of 2-10. The polyamide separation layer of the positively charged composite nanofiltration membrane contains a specific quaternary ammonium salt structure, so that the positively charged composite nanofiltration membrane has a high magnesium-lithium separation coefficient while maintaining high water flux, and is particularly suitable for the field of water treatment separation.

The invention relates to the field of membranes, and discloses a preparation method of an acid and alkali resistant positively-charged nanofiltration membrane, the acid and alkali resistant positively-charged nanofiltration membrane and application of the acid and alkali resistant positively-charged nanofiltration membrane. The method comprises the following steps: S1, sequentially preparing a porous support layer and an acid and alkali resistant separation layer on a bottom layer to obtain a composite membrane; and S2, contacting the composite membrane with an aqueous solution containing a catalyst, halogenated quaternary ammonium salt and / or halogenated quaternary phosphonium salt, and drying to obtain the acid and alkali resistant positively charged nanofiltration membrane, the acid and alkali resistant positively charged nanofiltration membrane has good acid and alkali resistance, and can simultaneously take the interception effect on divalent and high-valent heavy metal ions and relatively high water flux into account.

The invention belongs to the technical field of fluorescent probes, and discloses a coumarin molecular probe containing a porphin group and a preparation method and application of the coumarin molecular probe. The preparation method comprises the following steps: performing chloroacylation modification on two carboxyl groups in dicarboxyphenyl porphin molecules to obtain a chloroacylated porphin compound; and carrying out nucleophilic addition reaction on the chlorine compound subjected to chlorine acylation and coumarin containing hydroxyl to prepare the coumarin molecular probe containing the chlorine group, the preparation process is simple, the requirement for reaction conditions is low, the yield is high, the molecular probe has high selectivity, sensitivity and anti-interference performance on Fe < 3 + >, Fe < 2 + > and Fe < 3 + > can be accurately distinguished, and the molecular probe has good application prospects in the fields of light absorption antennas, organic light emitting diodes, fluorescent probes, anti-tumor drugs and the like.

The invention relates to the field of membranes, and discloses a positively charged composite membrane as well as a preparation method and application thereof. The composite membrane comprises a bottom layer, a porous support layer and a polyamide separation layer which are arranged in sequence, wherein the polyamide separation layer comprises a quaternary ammonium salt structure as shown in a formula I and / or a formula II; in the imgabs0 #, X is halogen; and Ar1 and Ar2 are each independently a residue after a reaction of a monomer containing a sulfonyl chloride group. The polyamide separation layer of the positively charged composite membrane contains a specific quaternary ammonium salt structure, so that the positively charged composite membrane has a high magnesium-lithium separation coefficient while maintaining high water flux, and is particularly suitable for the field of water treatment separation.

The invention relates to the field of membranes, and discloses a positively charged acid and alkali resistant composite nanofiltration membrane as well as a preparation method and application thereof. The positively charged acid and alkali resistant composite nanofiltration membrane sequentially comprises a bottom layer, a porous middle layer and an acid and alkali resistant separation layer, the acid and alkali resistant separation layer is grafted with a quaternary ammonium salt group as shown in a formula I and / or a quaternary phosphonium salt group as shown in a formula II through N atoms; # imgabs0 # is shown as a formula I; # imgabs 1 # is shown as a formula II; wherein R1 is a substituted or unsubstituted alkylene group of C1 to C9; r < 2 >, R < 3 > and R < 4 > are independently selected from C1-C3 alkyl groups or phenyl groups; r5 is an alkylene group of C1-C6, a phenyl group or an aralkyl group of C7-C10; r < 6 >, R < 7 > and R < 8 > are respectively and independently phenyl or C7-C10 aralkyl; x is halogen. Therefore, the nanofiltration membrane has a high magnesium-lithium separation coefficient while keeping high water flux.

The invention relates to the technical field of oilfield sewage treatment, and particularly discloses a composite water clarifier for oilfield sewage treatment and a preparation method of the composite water clarifier. The invention relates to a composite water clarifier for oilfield sewage treatment. The composite water clarifier is prepared from the following raw materials: dual modified polyacrylamide, an imidazoline quaternary ammonium salt grafted copolymer, a scale inhibitor, an adsorbent, dodecyl dimethyl betaine, a coagulant aid and deionized water, the double modified polyacrylamide is obtained by performing double modification on polyacrylamide by using 2, 3-epoxypropyl trimethyl ammonium chloride and a hydrophobic monomer; the imidazoline quaternary ammonium salt grafted copolymer is a grafted copolymer of imidazoline quaternary ammonium salt, acrylamide and acrylamide-2-methylpropanesulfonic acid. The composite water clarifier can be used for treating high-salt and high-oil sewage generated in the middle and later periods of oilfield exploitation, has the advantages of being high in salt resistance, thorough in demulsification and good in flocculation effect, can efficiently remove oil and suspended solids, ensures that effluent reaches the standard, and meets the complex sewage treatment requirements of an oilfield.

The invention relates to the field of membranes, and discloses an acid and alkali resistant positively charged composite nanofiltration membrane as well as a preparation method and application thereof. The acid and alkali resistant positively charged composite nanofiltration membrane comprises a bottom layer, a porous support layer and an acid and alkali resistant separation layer which are stacked in sequence, wherein the acid and alkali resistant separation layer comprises a quaternary ammonium salt structure. The acid and alkali resistant separation layer contains inert chemical groups, so that the nanofiltration membrane can also be used in an acid / alkali environment; and the acid and alkali resistant separation layer further comprises a quaternary ammonium salt structure, so that the nanofiltration membrane has excellent interception performance on divalent and high-valence metal cations while keeping relatively high water flux, and the concentration of the divalent and high-valence metal cations and the recovery of waste acid can be realized.

The invention discloses a laundry detergent based on a polyoxyethylene block Gemini quaternary ammonium salt bactericide and a preparation method thereof, and belongs to the technical field of wash supplies. The laundry detergent disclosed by the invention is prepared from the following components in percentage by mass: 20 to 25 percent of anionic surfactant, 1 to 5 percent of nonionic surfactant, 3 to 7 percent of polyoxyethylene block Gemini quaternary ammonium salt bactericide, 1 to 4 percent of viscosity modifier, 0.1 to 0.5 percent of stabilizer, 0.2 to 1 percent of enzyme, 0.05 to 0.2 percent of preservative, 0.1 to 2 percent of functional aid, 0.1 to 1.5 percent of essence and the balance of deionized water. A side-chain polyoxyethylene chain segment is embedded into a hydrophilic head group of the quaternary ammonium salt bactericide, and electrostatic attraction with an anionic surfactant is reduced through steric hindrance, so that the quaternary ammonium salt bactericide stably coexists with the anionic surfactant; the technical problem that an existing laundry detergent taking an anionic surfactant as a main active matter is difficult to realize triangular balance of sterilization, decontamination and stability is solved.

This invention discloses a method for preparing a highly efficient, low-toxicity, and environmentally friendly geminal quaternary ammonium salt based on plant-derived linalool. The method comprises: S1, synthesis of chloroacetate; S2, preparation of a ditertiary amine; and S3, synthesis of the highly efficient, low-toxicity, and environmentally friendly geminal quaternary ammonium salt based on plant-derived linalool. Using the ditertiary amine obtained in S2, the chloroacetate obtained in S1, and a solvent, the highly efficient, low-toxicity, and environmentally friendly geminal quaternary ammonium salt based on plant-derived linalool is obtained. This invention introduces plant-derived linalool into the geminal quaternary ammonium salt structure through chemical bonding. The nitrogen ions on the geminal quaternary ammonium salt adsorbed onto the negatively charged bacterial surface, combined with the hydrophobic interaction of the plant-derived linalool, produce an excellent "adhesion-killing" highly efficient synergistic antibacterial effect, providing a new approach and technology for the high-value resource utilization of natural products.

The invention relates to the field of membranes, and discloses an acid and alkali resistant separation membrane and a preparation method and application thereof, the acid and alkali resistant separation membrane sequentially comprises a base material layer, a porous support layer, a poly (triazinamine-urea) layer and a modification layer; wherein the cross-linked polymer forming the modification layer comprises a structural unit provided by polyphenol and a structural unit provided by first polyamine, and at least part of the structural unit provided by the polyphenol is further connected with the poly (triazinamine-urea) layer through ortho-positions of phenolic hydroxyl groups; wherein the pore diameter of the separation membrane is 0.1-0.5 nm, the surface Zeta potential of the acid-and-alkali-resistant separation membrane is 0-30 mV, and when the acid-and-alkali-resistant separation membrane is used for magnesium-lithium separation, high water flux can be kept, meanwhile, the acid-and-alkali-resistant separation membrane has a high magnesium-lithium separation coefficient and can be used for magnesium-lithium separation in an acid / alkali environment.

The invention discloses a preparation method of efficient low-toxicity environment-friendly gemini quaternary ammonium salt based on botanical linalool, which comprises the following steps: S1, synthesis of chloracetate, S2, preparation of di-tert-amine, and S3, synthesis of the efficient low-toxicity environment-friendly gemini quaternary ammonium salt based on botanical linalool: adopting the di-tert-amine obtained in the S2, the chloracetate obtained in the S1 and a solvent, and stirring uniformly to obtain the efficient low-toxicity environment-friendly gemini quaternary ammonium salt based on botanical linalool. The efficient low-toxicity environment-friendly gemini quaternary ammonium salt based on the plant source linalool is obtained. According to the invention, plant-derived linalool is introduced into a gemini quaternary ammonium salt structure through chemical bonding, nitrogen positive ions on the gemini quaternary ammonium salt are adsorbed on the surfaces of bacteria with negative electricity, and an excellent'adhesion-killing 'efficient synergistic antibacterial effect can be generated by the hydrophobic antibacterial effect of the plant-derived linalool and the nitrogen positive ions and the plant-derived linalool; a new thought and a new technology are provided for high-value resource utilization of natural products.

The application relates to the technical field of oilfield sewage treatment, and particularly discloses a composite water clarifying agent for oilfield sewage treatment and a preparation method thereof. The composite water clarifying agent for oilfield sewage treatment is prepared from the following raw materials: double-modified polyacrylamide, imidazoline quaternary ammonium salt graft copolymer, scale inhibitor, adsorbent, dodecyl dimethyl betaine, coagulant aid and deionized water; the double-modified polyacrylamide is obtained by double modification of 2,3-epoxypropyl trimethyl ammonium chloride and a hydrophobic monomer on polyacrylamide; and the imidazoline quaternary ammonium salt graft copolymer is a graft copolymer of imidazoline quaternary ammonium salt, acrylamide and acrylamide-2-methylpropane sulfonic acid. The composite water clarifying agent can be used for treating high-salt and high-oil sewage generated in the middle and late stages of oilfield exploitation, has the advantages of strong salt resistance, complete demulsification and good flocculation effect, can efficiently remove oil and suspended solids, ensures that the effluent meets the standards, and meets the complex sewage treatment requirements of oilfields.