64results about How to "Promotes microphase separation" patented technology

The invention relates to a functional resin tectorial membrane proppant and a preparation method thereof, and belongs to the technical field of oil-gas field development. The functional resin tectorial membrane proppant comprises aggregate and a resin film coated on the aggregate. Said resin film comprises organic silicon compounds of one or more active groups of amino, hydroxyl, carboxyl, alkoxyl and hydrosulphonyl. The side chain of the organic silicon compound is a hydrophobic group. The cured resin film has different wetting qualities for oil and water. The functional resin tectorial membrane proppant of the invention has a function of allowing the smooth permeation of oil gas and preventing water from penetrating through the proppant. Such a function improves the separation effect ofoil gas and water and reduces the oil production cost. The excellent hydrophobicity of the resin film facilitates the proppant to have excellent water resisting property and improves the crushing resistance of the proppant, so that the stream guidance effect is good for a long time.

An underlayer is formed to cover the upper surface of a substrate and a guide pattern is formed on the underlayer. A DSA film constituted by two types of polymers is formed in a region on the underlayer where the guide pattern is not formed. Thermal processing is performed while a solvent is supplied to the DSA film on the substrate. Thus, a microphase separation of the DSA film occurs. As a result, patterns made of the one polymer and patterns made of another polymer are formed. Exposure processing and development processing are performed in this order on the DSA film after the microphase separation such that the patterns made of another polymer are removed.

The invention discloses fluorinated polyurethane and a preparation method thereof. The fluorinated polyurethane is prepared through the steps: fluoroalkyl-containing polyether glycol and diisocyanate perform addition polymerization reaction, a tin catalyst is utilized to catalyze, a chain extender is utilized to extend a chain, and an amino silane coupling agent is added to seal ends. A product contains a fluorine-containing polyether block, the fluorine content is high, fluoroalkyl on a polyether lateral group is prone to generating microphase separation and surface migration, polyurethane surface energy is low, and the fluorinated polyurethane is easy to store and cure as the silane coupling agent is utilized to seal the ends. A water contact angle of a coating prepared from the fluorinated polyurethane is higher than 110 degrees, and the coating has excellent water repellency.

The invention relates to inner crosslinking type caster oil-based waterborne polyurethane emulsion and a preparation method thereof. The preparation method of the inner crosslinking type caster oil-based waterborne polyurethane emulsion is characterized by comprising the following steps of (1) adding polymer polyol, castor oil, diisocyanate, a catalyst and a small molecule chain extender into a reactor for reaction, so as to obtain caster oil-based waterborne polyurethane low polymers; (2) adding a hydrophilic chain extender and a polyfunctional-group crosslinking agent into the caster oil-based waterborne polyurethane low polymers, then, performing reaction; adding butanone to regulate the viscosity to be 16.5mPa*S, so as to obtain inner crosslinking type caster oil-based waterborne polyurethane; (3) adding a neutralizer into the inner crosslinking type caster oil-based waterborne polyurethane; after reaction, adding deionized water; performing high-speed shearing emulsification, thus obtaining the inner crosslinking type caster oil-based waterborne polyurethane emulsion after butanone is steamed out. The method has the advantages that the technical process is simple; the crosslinking efficiency is greatly improved; the mechanical property of the product is good.

The invention discloses a hydrophobic membrane based on fluorine-containing polyurethane and a preparation method of the hydrophobic membrane. The preparation method comprises the following steps: spin-coating the fluorine-containing polyurethane into a film; curing to obtain the hydrophobic membrane based on the fluorine-containing polyurethane; taking fluorine-containing alkyl polyether glycol and diisocyanate to be subjected to addition polymerization reaction; and catalyzing through a tin catalyst and extending a chain through a chain extender; and adding an amino silane coupling agent and capping an end to prepare the fluorine-containing polyurethane. The product has a fluorine-containing polyether block and high fluorine content; perfluoroalkyl located at a polyether side easily has micro-phase separation and surface migration; the surface energy of the polyurethane is low; and the fluorine-containing polyurethane is subjected to end capping by the silane coupling agent and is easy to store and easy to cure. The hydrophobic membrane based on the fluorine-containing polyurethane, disclosed by the invention, has a water contact angle higher than 110 degrees and good water repellency.

The invention relates to a novel biodegradable polyurethane biomaterial, its preparation method and its application in degradable implant and non-implant medical devices. The new material is an alternating block polyurethane polymer material based on biodegradable polyester diol and hydrophilic polyether diol. It is obtained by the selective coupling reaction between intermediate or aliphatic polyester diols and diisocyanate-terminated aliphatic polyester blocks. The product of the present invention has a controllable and predictable chemical structure and regular polymer chain arrangement, and has a surface microphase patterned structure, and can be widely used in many medical and non-medical device fields, among which peripheral nerve repair catheters, half-moon Excellent performance has been shown in applications such as plate repair, anti-adhesion films, meninges, eyelid reconstruction scaffolds, trauma dressings, bone composite porous repair scaffolds, and other tissue regeneration of soft and hard tissues.

The invention relates to a nano composite soy protein plastic and a preparation method thereof. The nano composite soy protein plastic is prepared by the following steps: with soy isolate protein as a base material, dialdehyde polysaccharide with the aldehyde content of 5%-80% as a cross-linking agent, and amino nano clay as a nano filler, adding a plasticizer which is 10%-30% of dry weight of the soy isolate protein and a certain amount of deionized water; carrying out hot-pressing by using a hot press at 80-140 DEG C and 5-50MPa for 3-30 minutes. The nano composite soy protein plastic prepared by the method has relatively high water resistance, mechanical property and heat stability, is an environment-degradable high-strength protein plastic, and has a wide application prospect in the fields such as biological materials, foods and medicine packaging.

The invention belongs to the technical field of alkaline polymer electrolyte membranes, and relates to a comb structure high-conductivity polybenzimidazole anion exchange membrane and a preparation method thereof. The method comprises the steps of firstly, subjecting the polybenzimidazole and a branch having no cationic functional group to a grafting reaction so as to synthesize a deprotonated comb-like grafted polybenzimidazole material, thereby maximizing the grafting ratio and preventing the N-H in the polybenzimidazole from forming an acid-base pair with the cationic functional group and further reducing its reactivity and activity; and then reacting the deprotonated comb-like grafted polybenzimidazole material with a quaternization agent to connect the tail end of the branch to the cationic functional group to form an ion cluster which is easy to aggregate and a hydrophilic/hydrophobic microphase separation structure. The anion exchange membrane prepared by the method has excellent electrical conductivity, mechanical property and alkali stability.

The invention relates to novel conjugated polymer of polyacenaphthylene and quinoxaline, a preparation method of the conjugated polymer, as well as an application of the conjugated polymer in polymer solar cells. The conjugated polymer of polyacenaphthylene and quinoxaline, provided by the invention, has the structure formula as follows: Ar takes electron-rich aromatic ring as a structure unit; R1 is a linear chain or branch chain alkyl with the hydrogen atom number or carbon atom number of 1 to 20; and R2 is a linear chain or branch chain alkoxy with the hydrogen atom number or carbon atom number of 1 to 20.

The invention discloses a star topology polyolefin anion exchange membrane, a preparation method and an application thereof, and belongs to the technical field of basic anion exchange membranes. A star topology polyolefin block main chain membrane material with good solubility and stability is synthesized by anionic polymerization. Benzyl sites are brominated by catalytic hydrogenation and a bromination reagent, ionic conductive groups are grafted by Menschutkin reaction to obtain a star topology polyolefin film material, and a membrane is prepared. The prepared membrane has good alkali stability and high ionic conductivity, and can be applied to alkaline fuel cells.

The invention discloses a pH-sensitive biodegradable polyurethane-urea material and a preparation method thereof. The polyurethane-urea is pH-sensitive biodegradable polyurethane-urea prepared by mixing dihydroxy-terminal polyether ester with N,N-bis(2-ethoxy) 4-pyridinccarbox amide, carrying out chain expansion by using carbamido-containing diisocyanate and purifying; the polyether ester is usedas a main soft segment, a chain segment containing carbamido and urethane group is used as a hard segment and a pyridine ring is positioned on a side chain. The polyurethane-urea has the characteristics of biodegradability, absorbability of a degradation product, pH sensitivity, high expanding and degrading rate in acidic mediums, as well as basically no expansion and low degrading rate in neutraland alkaline mediums; in addition, the pH sensitivity is not basically affected by temperature and can be applied to the field of controlled release as a drug carrier, and further the drug release rate is controlled according to pH values of different parts of an organism. The hard segment formed by carbamido-containing structure diisocyanate contains dense hydrogen bonds, so that the mechanicalproperty of the material is improved.

The invention discloses a polyalkenyl polytetrahydrofuran adhesive and a synthesis method thereof, the structural formula of the polyalkenyl polytetrahydrofuran adhesive is shown in a formula I. The synthesis process comprises the following steps: polytetrahydrofuran glycol triggers ring opening polymerization of 3-hydroxymethyl-3-ethyl-oxetane to obtain polyhydroxyl polytetrahydrofuran, the polyhydroxyl polytetrahydrofuran and allyl isocyanate are subjected to addition reaction to obtain the polyalkenyl polytetrahydrofuran. The synthesis method is simple, and the two ends of the polyalkenyl polytetrahydrofuran adhesive contain a plurality of alkenyl groups and carbamate groups, and can endow a polyisoxazoline elastomer with relatively high mechanical property. In the formula I, x + y is equal to 1-6, and is an integer; m is equal to 8-60, and is an integer.

The invention belongs to the technical field of biomaterials, and particularly relates to a preparation method and an application of a high-biocompatibility biodegradable bone filling material. The bone filling material is composed of polyurethane urea having phosphorylcholine at the end of a flexible side chain, and polyurethane urea is prepared from a single-ended dihydroxy polyethylene glycol phosphorylcholine compound, double-ended hydroxypolydioxanone and L-lysine diisocyanate-1,4-dibutyl diamine-L-lysine diisocyanate. The phosphorylcholine group located at the end of the flexible polyethylene glycol side chain is easily enriched on the surface of the material in order to greatly improve the hydrophilicity of the material, hinder the deposition of platelets and proteins and avoid theformation of thrombus, so the material has high biocompatibility, solves the problems of low biocompatibility and poor mechanical performances of polyurethane with the side chain simply being polyethylene glycol or phosphorylcholine, especially used a long-term implant material, in the biomedical field, and has widened applications in fields of tissue engineering, drug controlled release, gene therapy and cosmetics.

The invention discloses a polyolefin anion exchange membrane based on a block structure and a preparation method thereof, and belongs to the technical field of alkaline anion exchange membranes. A polyolefin block main chain membrane material with good solubility and stability is synthesized through a coordination polymerization method, and then a polymer is directly subjected to a click reactionby taking terminal olefinic double bonds of a main chain as grafting sites to introduce nitrogen-containing sulfhydryl groups, and after a quaternization reaction, a hydrogenation reaction, ion exchange and membrane casting are carried out to obtain a 'crystalline-non-crystalline' membrane material. The prepared anion exchange membrane has excellent alkali stability and ion conductivity, and can be applied to alkaline fuel cells.

The invention discloses a bio-compostable polyester material composition, which is mainly composed of the following components in parts by weight: 100 parts of bio-compostable polyester and 0.05 to 5 parts of organic modifier; wherein the chemical formula of the organic modifier is R1-NH-C(O)-C(O)-NH-R2 or R1-NH-C(O)-C(O)-NH-R0-NH-C(O)-C(O)-NH-R2, and the R0, R1 and R2 individually represent an alkyl group or an alkyl group containing a substituent. The bio-compostable polyester material composition prepared by the provided preparation method has the characteristics of high crystallization temperature, fast crystallization speed, short semi-crystallization period, and high mechanical strength, and can shorten the forming period, reduce the cost, and improve the performance. Moreover, the preparation method has the advantages of simpleness, environment-friendliness, and easiness for industrialization.

The invention provides liquid crystal polyurethane urea with cholesteric side chains and a preparation method of the liquid crystal polyurethane urea. Cholesteric liquid crystal units are connected toa main chain through long flexible segments in a covalently mode, single-end dihydroxy cholesteric liquid crystal monomer (DAP) is mixed with double-end hydroxyl polyethylene glycol (PEG), chain extension is performed by using diisocyanate containing a urea-based structure, and the liquid crystal polyurethane urea with the cholesteric side chains is obtained through purification. The liquid crystal polyurethane has a number average molecular weight of 1.0*10<5>-5.0*10<5> and a dispersion coefficient of 1.20-1.51, the mass content of DAP in the liquid crystal polyurethane is 25-52%, and the mass content of PEG in the liquid crystal polyurethane is 12-52%. By combining a cholesteric liquid crystal into polyurethane through a condensation polymerization mode, not only can migration of the small molecule liquid crystal be avoided, but also the blood compatibility and biocompatibility of a polyurethane film can be improved; therefore, reference is provided for application of the modified polyurethane material in biomedical engineering, and good biodegradability can be obtained.