34results about How to "Shorten swelling time" patented technology

The invention discloses a preparation method of polymer particle, which comprises that suspends monodisperse and swelling seed polymer particles with a first preset value of mass into a water solution containing stabilizer and surface activator, mixes polymerisable monomer with mass of second preset value and initiator with mass as third preset value, to be added into monomer solution at polymerisable temperature, to process reaction, while the reaction degree is controlled at 30-98%, adjusts temperature, adds reactant, swells, while the reactant contains a polymerisable monomer with mass of fourth preset value or a second crosslinkable monomer with mass of fifth preset value, and an initiator with mass of sixth preset value, heats to polymerisable temperature, to process polymerization. The inventive microballoon has better monodispersity, high yield, reaction reproduction support, reduced production cost, and controllable product shape and property, while the invention can prepare porous monodisperse microballoon product.

The invention relates to a rapid dissolving method for ultrahigh molecular weight polyacrylonitrile. The method comprises the following steps: (1) grinding ultrahigh molecular weight polyacrylonitrile solid particles, sieving with a 50-300 mesh sieve so as to obtain ultrahigh molecular weight polyacrylonitrile powder; (2) slowly adding the ultrahigh molecular weight polyacrylonitrile powder in a solvent with a temperature of 0 to 25 DEG C under mechanical stirring with a rotation speed of 200-1000 revolution per minute, after adding ultrahigh molecular weight polyacrylonitrile powder, heating the solvent to a temperature of 60 to 120 DEG C under mechanical stirring with a rotation speed of 200-1000 revolution per minute, maintaining the temperature for 6 to 12 hours so as to obtain a ultrahigh molecular weight polyacrylonitrile solution, and finally filtering. The rapid dissolving method for ultrahigh molecular weight polyacrylonitrile has the advantages that the dissolving temperature is low, the energy consumption is saved, and the swelling time is greatly reduced so as to quickly finish the dissolution; furthermore, the dissolution operation is convenient, the equipment is simple, and the method is easy to carry out in engineering.

The invention relates to a preparation method of low-molecular-weight plant gelatin powder. The method comprises the following steps of: hydrating, rubbing, rolling and tackifying a plant gelatin sheet; sequentially carrying out enzymolysis treatment by utilizing mannose enzyme liquid and neutral protease liquid; and drying prepared plant gelatin with the certain molecular weight and treating into gelatin powder with the 120-160-mesh size. The plant gelatin sheet prepared by using the method disclosed by the invention can be any one of a guanidine gelatin sheet, a sesbania gelatin sheet and a tonka-bean gelatin sheet. A prepared product has the advantages of low water insoluble matters, high thickening efficiency, rapidness in thickening, protruding salt solubility, temperature stability and corrosion resistance, capability of being repeatedly used, and the like.

The invention discloses glucose-sensitive type full interpenetrating network hydrogel and a preparation method thereof. The hydrogel comprises two interpenetrating networks including an AAPBA (acrylamidophenylboronic acid) polymer network and a CS (chitosan) crosslinked network. The hydrogel can reduce pKa of PBA, has good response strength and response rate for glucose under the physiological pHand has shortened swelling time and increased swelling degree as compared with gel without CS crosslinked networks, and the IPN structure improves the mechanical strength of the hydrogel. The preparation method of the hydrogel is simple, mild in reaction condition and suitable for industrial production.

The invention discloses a preparation method of an ethylene propylene diene monomer/polyaniline/high density polyethylene composite conducting material. The preparation method comprises the following steps: (1) adding an aniline monomer to ethylene propylene diene monomer powder, and stirring evenly to obtain the swelled ethylene propylene diene monomer; (2) obtaining ethylene propylene diene monomer/polyaniline composite conducting powder; (3) obtaining ethylene propylene diene monomer/polyaniline/high density polyethylene composite particles; (4) obtaining the ethylene propylene diene monomer/polyaniline/high density polyethylene composite conducting material. The method is capable of obtaining the high-electrical conductivity composite material in case of relatively low polyaniline content; meanwhile, the method provides good processability, and is capable of effectively weakening the influence of the degradation of other properties of the composite material due to the increase of the polyaniline content.

The invention discloses a preparation method of a composite conductive polylactic acid material. The preparation method comprises the following steps of 1 adding an aniline monomer into ethylene propylene diene monomer powder to obtain swelled ethylene propylene diene monomer powder, 2 obtaining ethylene propylene diene monomer/composite conductive polyaniline powder, 3 putting the ethylene propylene diene monomer/composite conductive polyaniline powder obtained in the step 2 and polylactic acid into a high-speed mixing machine to obtain ethylene propylene diene monomer/polyaniline /composite polylactic acid particles into a mold to obtain the composite conductive polylactic acid material. In the preparation method, the assisting effect of ultrasonic waves enables the ethylene propylene diene monomer powder to swell and produce cavatition effect, the diffusion speed of the aniline monomer can be improved, and swelling time can be shortened.

The invention relates to a preparation method of low-cost fully-biodegradable plant fiber starch tableware, which comprises the following steps of S1, taking a plant cellulose material containing scutellaria baicalensis dregs to prepare a modified plant fiber starch-based blank, S2, sequentially performing crushing and superfine crushing treatment on the konjac glucomannan to prepare a colloid adhesive of the composite deacetylated konjac glucomannan, S3, mixing a colloid adhesive of composite deacetylated konjac glucomannan with the modified plant fiber starch-based blank to form a mixture, and S4, putting the mixture into a forming mold to be subjected to foaming forming, preparing the tableware, and acquiring the fully-degradable ecological tableware. The tableware is good in antibacterial performance, capable of being fully degraded, low in cost and simple in preparation method.

The invention relates to a preparation method of traditional Chinese medicine topical gel. The method comprises the following steps: taking fructus psoraleae, radix aconiti carmichaeli, fructus cnidii, radix dipsaci, fructus rubi, benzoin, rhizoma zingiberis, chilli, radix polygalae, rhizoma cibotii, radix aconiti, radix angelicae sinensis, rhizoma seu radix notopterygii, radix angelicae pubescentis, rhizoma galangae, rhizoma arisaematis and flos caryophyllata, adding ethanol for heating reflux extraction, combining extracting solutions, filtering and concentrating into clear paste; take carbomer, adding glycerin, and adding water to obtain a carbomer swelling solution; then adding the clear paste, soaking, mixing uniformly, and then adding triethanolamine to obtain carbomer aqueous gel containing alcohol extracts; dissolving albolene in turpentine and methyl salicylate, and adding menthol, borneol, camphor and laurocapram for dissolving, and then adding Tween-80 to obtain an oily matrix mixture; adding the mixture into the carbopol aqueous gel containing alcohol extracts, and emulsifying uniformly, so as to obtain the traditional Chinese medicine topical gel. The Wentong ointment obtained by the preparation method disclosed by the invention has better efficacy of being analgesic and detumescent and removing stasis than that of the Wentong ointment obtained through the original technology.

The present invention provides a room-temperature selective swelling method of pore-forming used for preparing separation membranes, comprising: treating a dense membrane of an amphiphilic block copolymer by a composite swelling agent at 15-30° C. for 1 min-24 h, removing the residual solvent, then leaving the membrane at room temperature to dry, so as to obtain an amphiphilic block copolymer separation membrane with a bi-continuous porous structure, wherein the composite swelling agent is composed of 60-96% of a first swelling agent and 4-40% of a second swelling agent, the first swelling agent is an alcohol solvent, the second swelling agent is selected from any one or a mixture of two or more of toluene, styrene, tetrahydrofuran, 1,4-dioxane and so on. In the method of the invention, selective swelling can be achieved at room temperature, abating the energy consumption in membrane-forming process. The method has universality and can be widely used in the pore-forming process of various amphiphilic block copolymers. The swelling level and morphology can be controlled by adjusting the composition of the solvent in the swelling agent and the second swelling agent content in the swelling agent.

The invention provides a preparation method of a swelled natural silk fiber material. The preparation method comprises the following steps: preparing a mixed solution of diethyl ether, hexanediol andwater in a proportion of 1 to (10-15) to (30-50); adding natural silk fibers and the mixed solution into a vacuum stirrer in a solid-liquid ratio of 1 to (10-20), and stirring at a pressure of 0.03MPa-0.05MPa for 3-6 minutes; and carrying out supercritical fluid swelling by taking supercritical carbon dioxide as a swelling agent, so as to obtain the swelled natural silk fiber material, wherein thesolid-liquid ratio of the natural silk fibers to the swelling agent is 1 to (8-12), the supercritical fluid swelling pressure is 6MPa-10MPa, the supercritical fluid swelling temperature is 55-75 DEGC, and the supercritical time is 10-15 seconds.

The invention discloses a method for testing the swelling degree of a solid powdery polymer composite material. The method comprises the following steps: firstly, carrying out compression molding on a solid powdery polymer composite material, cutting into square slices, polishing to be flat by using a grinding tool, then packaging the slices by using a cloth bag, putting into a Soxhlet extractor, adding methyl ethyl ketone, carrying out reflux impregnation, and calculating the swelling degree according to the weight before and after impregnation. The method disclosed by the invention is relatively high in repeatability and stability, stable in test data, capable of better characterizing the impregnation degree of the test sample on methyl ethyl ketone, and suitable for a high-molecular polymer composite material of which the main component is more than 95% of polyamide, polyurethane, polyimide and the like.

The invention discloses a method for preparing an EPDM rubber/polyaniline/polypropylene compound conductive material. The method comprises the following steps: (1) obtaining swelled EPDM rubber powder; (2) obtaining EPDM rubber/polyaniline compound conductive powder; (3) obtaining EPDM rubber/polyaniline/polypropylene compound granules; (4) obtaining the EPDM rubber/polyaniline/polypropylene compound conductive material. According to the method, a composite with high electrical conductivity can be obtained under the condition of lower polyaniline content, meanwhile better processability can be provided, and the influence that other performance of the composite is reduced caused by addition of the polyaniline content is effectively weakened.