37results about How to "Good alkali resistance and stability" patented technology

The invention discloses imidazole ionic liquid with high alkali-resistant stability and application of the imidazole ionic liquid. The ionic liquid has the following chemical structure as shown in the text, wherein m is an integer between 0 to 8, n is an integer between 0 to 6, -R is one of FORMULAE, and X is one of I, Br and Cl. The ionic liquid can be used for preparing an anion exchange polymer membrane. The ionic liquid has high alkali-resistant stability; by using the imidazole ionic liquid, the alkali-resistant stability of the alkali anion exchange membrane is greatly improved; and the imidazole ionic liquid can be applied in the field of alkali fuel cells.

The invention discloses a preparation method of a semi-flexible polyether sulfone/ ketone anion-exchange membrane, and particularly provides a preparation method of a high-conductivity anion-exchange membrane of a fuel cell. The membrane material contains flexible aliphatic chains with different lengths in repetitive units. The preparation method comprises steps as follows: 1), polymer synthesis; 2), polymer halomethylation; 3), preparation of the semi-flexible polyether sulfone/ ketone anion-exchange membrane. Due to the fact that the aliphatic chains are introduced into a main polymer chain, the flexibility of the main chain is further improved, the main chain acquires higher mobility, hydrophilic and hydrophobic microphase separation is enhanced, a better ion channel is formed accordingly, and membrane swelling is reduced. The preparation technology is simple, the cost is low, and the prepared anion-exchange membrane has high conductivity and good stability and is applicable to an alkaline fuel cell.

Disclosed are a novel synthetic cationic vegetable oil fat liquor and a preparation method thereof. The novel synthetic cationic vegetable oil fat liquor is prepared from rapeseed oil, methanol, ethanolamine and quaternary ammonium salt ETA (epoxypropyl trimethyl ammonium chloride) by transesterification between the rapeseed oil and the methanol, amidation reaction between rapeseed oil fatty acid methyl ester and the ethanolamine and reaction between quaternization reagent and a product obtained from amidation reaction. The novel synthetic cationic vegetable oil fat liquor and the preparation method have the advantages that by means of an internal emulsification method, cationic active groups are introduced into rapeseed oil molecular structures, and accordingly, the novel synthetic cationic vegetable oil fat liquor is high in dilution-resisting, acid-resisting, alkali-resisting and chromic-salt-resisting stability; permeation and even distribution of chromium can be promoted, chromium absorption of rawhide is increased, and the novel synthetic cationic vegetable oil fat liquor can serve as a pre-fat-liquoring material before chrome tanning; the novel synthetic cationic vegetable oil fat liquor has excellent oil and color fixation performance, thereby being a preferred material serving as leather dyeing and oil and color fixing after fat liquoring.

The invention provides a positively-charged quaternary ammonium salt functionalized polysulfone/nano attapulgite hybridized anion exchange membrane and a preparation method thereof, and belongs to thefield of alkaline anion exchange membrane fuel cells. In the method, trimethylchlorosilane and paraformaldehyde are used as polysulfone chloromethylation reagents, and tin chloride is used as a catalyst; the chloromethylation degree of polysulfone is controlled by controlling the molar ratio of polysulfone to trimethylchlorosilane, paraformaldehyde and tin chloride and the reaction time of chloromethylation; a positively charged quaternary ammonium salt functional group is adopted as a functional group for transmitting OH <-> ions, and the functional group is grafted to chloromethylated polysulfone through a Menschutkin reaction; then, hydrophilic nano attapulgite is adopted as an inorganic additive material and dispersed into a positively charged quaternary ammonium salt functionalized polysulfone solution through high-power ultrasonic, mechanical stirring and other methods, and the positively charged quaternary ammonium salt functionalized polysulfone/nano attapulgite hybrid anion exchange membrane is prepared through a tape casting method.

The invention provides alkali-resisting activated dye and belongs to the technical field of fine chemical engineering. The alkali-resisting activated dye is prepared from, by weight, 60-90 parts of dye, 30-50 parts of an alkali-resisting conditioning agent and 10-20 parts of a water repellent agent. In order to solve the problem that dye has many hydrophilic groups, thereby being poor in water resistance and not resistant to water washing, the alkali-resisting activated dye is applied to the commercial production process of dye, the alkali-resisting conditioning agent and the water repellent agent with the certain proportion are added in a commercial dye formula, the molecule groups of the activated dye are wrapped through the water repellent agent, and the hydrophilic groups of the activated dye are obstructed. General mixing equipment is used for directly preparing the alkali-resisting activated dye, and the alkali-resisting activated dye has the advantages of being convenient to apply, good in alkali-resisting stability and the like.

The invention discloses a mercerizing penetrant and a preparation method thereof. The mercerizing penetrant comprises 20 to 30 wt% of silicon-modified polyether, 10 to 20 wt% of fatty alcohol polyoxyethylene ether sulfate and 10 to 20 wt% of alkyl diphenyl ether sulfonate, with the balance being water, wherein the silicon-modified polyether has a number-average molecular weight of 200 to 2000 g/mol and has a general structural formula as described in the specification. In the formula, R is a straight-chain or branched-chain C6-18 alkyl group; R' is a straight-chain or branched-chain C1-10 alkylene group or a C6-10 arylene group; m is in a range of 1 to 20; n is in a range of 0 to 20; and m and n are both integers. The preparation method for the mercerizing penetrant is simple to operate. Through mutual synergism of the components of the mercerizing penetrant, the prepared mercerizing penetrant has alkali resistance of 300 g/L and shows good penetration performance and alkali resistancestability in an alkali solution with a concentration of 180 to 300 g/L; and the mercerizing penetrant has low foam, does not influence the recovery of alkaline liquor and obviously improves mercerizing effect.

The invention relates to a polymer anion exchange membrane and a preparation method thereof, in particular to a polyfluorene-based side-chain anion exchange membrane and a preparation method thereof. According to the invention, a series of weak-bond-free polyfluorene high polymer materials are synthesized through Suzuki coupling reaction to serve as a main chain framework of AEMs, in order to maintain the strength of AEMs, a stable alkyl chain segment is introduced into the polyfluorene main chain, the chain flexibility and solubility of polyfluorene are adjusted, the distance between quaternary ammonium cations and aromatic rings on the main chain is adjusted, the polarization effect of the cations on the main chain is reduced, and the alkali resistance of AEMs is improved; the polyfluorene-based polymer is prepared, and a microphase separation structure is constructed to improve the ionic conductivity of a polymer film; and the whole preparation process is simple and efficient.

The invention belongs to the technical field of building materials, and discloses a permeable concrete floor dyeing agent, which is composed of the following raw materials (by weight): 20-40% of an organic pigment, 0.01-0.05% of an antifoaming agent, 0.2-0.6% of a dispersing agent, 0.4-0.8% of a stabilizer, 0.1-0.3% of guar hydroxypropyltrimethylammonium chloride, 3-5% of a penetrant, 0.1-1% of dioctyl sulfosuccinate sodium salt, 1-2% of potassium tripolyphosphate, 0.5-0.8% of a pH regulator, and the balance water. The dosage of the dyeing agent is 8-12 m<2>/kg; the dyeing effect is firm; andthe colored concrete floor with the application of the dyeing agent has alkali resistance, water resistance and good temperature difference resistance.

The invention relates to a polymer anion exchange membrane and a preparation method thereof, in particular to a main chain type alkaline anion exchange membrane based on ether-bond-free polyfluorene and a preparation method thereof. According to the invention, piperidine cations with excellent alkali-resistant stability are selected, and methylene side chain substituted fluorenyl monomers with different sizes at the ninth site are designed and synthesized. The fluorenyl polymer without containing ether bonds is prepared through acid-catalyzed Friedel-Crafts polymerization, so that the chemical stability of the anionic membrane is improved. The whole preparation process is simple and efficient. A methylene side chain is introduced into a hydrophobic segment of a polymer main chain, formation of micro-phase separation in the membrane is promoted, and a high-speed channel is provided for ion transmission, so that the conductivity of the membrane is further improved.

The invention discloses a polyethylene polypropylene fiber macromoleculewaterproof roll which consists of the following components in parts by weight: 92.0-95.0 parts of a linear low density polyethylene resin, 0.5-1.5 parts of phthalocyanine blue, 0.1-0.5 part of a dispersant and 5.0-8.0 parts of an activator, wherein the activator is prepared from the following steps: (1) performing steam explosion treatment, namely performing steam explosion treatment on momordica grosvenori residues extracted with water in a steam tank; (2) performing high-shearing homogenizer treatment, namely putting anequal amount of pure water into the material obtained in the step (1), performing high-shearing homogenization treatment, and drying, thereby obtaining the activator.

The invention relates to a preparation method of a proton exchange membrane for a fuel cell, and belongs to the technical field of energy materials. Modified octa(cobaltocenyl)-POSS is introduced intoa solution of functional polymer materials such as polyimide, polybenzimidazole, polyether-ether-ketone, polyether sulfone and the like, and the high-performance anion proton exchange membrane can beconveniently obtained through a solution casting method. The preparation method is short in process and simple to operate, and meanwhile, compared with a commercial anion proton exchange membrane, the exchange membrane prepared on the basis of the preparation method has high ionic conductivity, excellent alkaline functional group stability, high mechanical strength and low swelling property. Besides, POSS with good organic compatibility is introduced, and the organic-inorganic special structure of POSS is utilized, so that the formation of an effective micro-phase separation structure is promoted, the proton conductivity of the composite membrane is improved to a certain extent, and the composite membrane has a wide application prospect in the field of anion proton exchange membranes.

The invention discloses a polyethylene polypropylene fiber high molecular waterproof roll with good alkali-resistant stability. The roll is prepared from the following components in parts by weight: 90.0-95.0 parts of linear low density polyethylene resin, 0.5-1.5 parts of carbon black, 0.1-0.5 part of a dispersant and 5.0-10.0 parts of an activator. The activator is prepared from the following methods: (1) carrying out steam explosion treatment, namely putting water extracted momordica grosvenori residues in a steam explosion tank to treat; and (2) carrying out high shear homogenizer treatment, namely adding pure water equal in weight into the material obtained in the step (1), carrying out treatment by a high shear homogenizer, and drying the mixture to obtain the activator.