45results about How to "High swelling" patented technology

A method is provided for preparing an adhesive composition that contains both a hydrophobic phase and a hydrophilic phase, wherein the hydrophobic phase is composed of a crosslinked hydrophobic polymer composition and the hydrophilic phase is a water-absorbent blend of a hydrophilic polymer and a complementary oligomer capable of crosslinking the hydrophilic polymer through hydrogen bonding, ionic bonding, and/or covalent bonding. The composition is useful as a bioadhesive, for affixing drug delivery systems, wound dressings, bandages, cushions, or the like to a body surface such as skin or mucosal tissue.

Disclosed are paper coating latex, a method for preparing the same, and paper coating composition containing the same, characterized in that in the paper coating latex having a core-shell structure, the core is formed by the polymerization of monomer mixtures comprising 5 to 35 weight parts of ethylene unsaturated acid based on 100 weight parts of the core and the shell has glass transition temperature up to room temperature, lower than that of the core. The present invention has an effect of providing a high quality matte coated paper that has excellent printability such as ink drying rate, adhesion, etc., as well as low white paper gloss and improved print gloss by coating paper coating composition containing multi-layered paper coating latex having high swelling and contraction property on paper.

A high swell, long-lived hydrogel sealant formed by reacting a highly oxidized polysaccharide containing aldehyde groups with a multi-arm amine is described. The hydrogel sealant may be particularly suitable for applications requiring high swell and slow degradation, for example, tissue augmentation, both cosmetic and reconstructive; void filling; tissue bulking, for example treatment of urinary incontinence and acid reflux; and embolization. The high swell, long-lived hydrogel sealant may also be useful as a tissue sealant and adhesive, and as an anti-adhesion barrier.

An adhesive composition is provided that contains both a hydrophobic phase and a hydrophilic phase, wherein the hydrophobic phase is composed of a crosslinked hydrophobic polymer composition and the hydrophilic phase is a water-absorbent blend of a hydrophilic polymer and a complementary oligomer capable of crosslinking the hydrophilic polymer through hydrogen bonding, ionic bonding, and/or covalent bonding. The composition is useful as a bioadhesive, for affixing drug delivery systems, wound dressings, bandages, cushions, or the like to a body surface such as skin or mucosal tissue.

The invention relates to a mushroom dietary fiber compound seasoning and a production method thereof, which are characterized in that the compound seasoning is prepared by taking mushroom as a raw material through the steps of carrying out selecting, washing, microwave enzyme deactivation, homogenizing, enzymolysis, concentration, microwave drying, extruding, superfine grinding and the like on the mushroom so as to obtain mushroom dietary fiber powder; compounding the mushroom dietary fiber powder with salt, white granulated sugar, chicken essence, beta-Cyclodextrins, CMC-Na, garlic powder, ginger powder, chili powder, paprika powder, curry powder, and then sterilizing and packaging to obtain the product. The mushroom dietary fiber compound seasoning prepared according to the invention is rich in nutrition, delicious in flavor and good in dispersibility; the dietary fiber content of the product is 5-20%, therefore, the mushroom dietary fiber compound seasoning is a health-care seasoning.

The invention discloses a preparation method of porous high-swelling gelatin microspheres. The preparation method comprises the following steps: preparing gelatin into a water solution with the mass concentration of 30%, adding another component as a pore-foaming agent, wherein the pore-foaming agent can be an inorganic substance such as nano calcium carbonate powder as well as a water-soluble high polymer such as polyethylene glycol, polyvinyl alcohol, polymethylacrylic acid-2-(N,N-dimethyl) amino ethyl ester, uniformly mixing the water solution of gelatin with the pore-foaming agent, suspending and dispersing in paroline, adding a spann-80 and tween-60 mixed stabilizer, slowly dropwise adding a formaldehyde solution while stirring, reacting for hours so that the gelatin is crosslinked; then, filtering and separating microspheres, removing the pore-foaming agent, purifying and drying, thus obtaining the porous high-swelling gelatin microspheres. When the microspheres are used as a medicine-carrying embolic agent, the medicine carrying rate and the medicine carrying speed of medicines can be increased, and the use performance is improved.

The invention discloses a multi-responsive pNIPAAm (poly(N-isopropylacrylamide))/(mPEG-g-CMCS) (methoxy polyethylene glycol-g-carboxymethyl chitosan) aquagel and a preparation method thereof. The aquagel is prepared by the following steps: modifying mPEG with formyl group, grafting with natural polysaccharide CMCS to form mPEG-g-CMCS, and carrying out crosslinking reaction with NIPAAm (N-isopropylacrylamide). The preparation method comprises the following steps: modifying the mPEG with formyl group by using acetic anhydride, and carrying out reduction grafting on the CMCS by using NaBH4 to obtain the mPEG-g-CMCS; and dissolving the mPEG-g-CMCS, N,N'-methylene-bis-acrylamide and NIPAAm in deionized water, introducing argon to remove oxygen, carrying out sealed refrigeration at 4 DEG C for 1 hour, and adding N,N,N',N-tetramethyl ethylene diamine and ammonium persulfate at room temperature to react for 24 hours, thereby obtaining the pNIPAAm/(mPEG-g-CMCS) aquagel. The method is simple to operate, and has the advantages of cheap raw materials and wide resources. The prepared aquagel has the advantages of dual sensitivity to temperature and pH and high degree of swelling. Compared with the pure pNIPAAm, the aquagel has very high biocompatibility and wider application range.

The invention relates to a preparation method of cross-linked sodium carboxymethyl cellulose. The preparation method of the cross-linked sodium carboxymethyl cellulose comprises the following steps of: adding an inorganic acid catalyst into sodium carboxymethyl cellulose solution to change a reaction system to be acidic; after reaction, adding a cross-linking agent; removing oxygen and charging nitrogen; prepolymerizing and polymerizing to obtain cross-linked carboxymethyl cellulose solution; dropwise adding alkalized ethanol-water solution to obtain cross-linked sodium carboxymethyl cellulose solution; and drying to obtain the cross-linked sodium carboxymethyl cellulose powder. According to the preparation method, a silicon dioxide composite nanomaterial, silicon dioxide-hydroxyl propyl acrylate, is used as the cross-linking agent, sodium carboxymethyl cellulose is used as a raw material, and cross-linking is performed under an alkaline condition to prepare the cross-linked sodium carboxymethyl cellulose. The cross-linked sodium carboxymethyl cellulose prepare by the invention has the characteristics of high transparence, high viscosity, high swelling degree and the like, and hasextremely high industrial application value.

The invention relates to a double in-situ synthesis method of temperature-responsive nano silver composite hydrogel. By adopting an ultraviolet radiation method, under a condition without an initiator and a reducing agent, with dimethylaminoethyl methacrylate and 2-acrylamide-2-methylpropanesulfonic acid as monomers, N,N'-methylene bisacrylamide as a cross-linking agent, polyethylene glycol 400 as a pore forming agent, and silver nitrate as a metal source, and under a nitrogen atmosphere, the temperature-responsive nano Ag/P(DMAEMA-g-AMPS) composite hydrogel is synthesized. The prepared nano silver composite hydrogel has uniform dispersed nano silver particles and good chemical cross-linking stability, allows the swelling degree to be increased by 294.8 compared with that of pure water gel, and improves water absorbency and water retention of the hydrogel; the composite hydrogel allows temperature responsiveness to be enhanced, thereby being beneficial for medical drug release and other applications; and the composite hydrogel allows the thermal decomposition temperature to be decreased by 78 DEG C compared with that of pure hydrogel, thereby being beneficial for polymer waste post-processing.

Preparation of nano chitosan in the invention almost has no chemical reaction, chitosan is mainly dissolved and dispersed, and chitosan is not dissolved in a sodium hydroxide solution, so that chitosan particles are separated out. Meanwhile, preparation conditions are mild, the safety is high, and preparation raw materials are common and nontoxic. The obtained nano chitosan is an ideal raw material for preparing artificial skin, the prepared artificial skin is soft in texture and is comfortable, the laminating performance between the prepared artificial skin and a wound surface is good, and the prepared artificial skin is breathable, can absorb water, has antibacterial and anti-inflammatory effects, and has the functions of stopping pain, arresting bleeding and promoting wound healing. Along with the healing of the wound of a patient and the growth of the skin of the patient, the chitosan artificial skin can be automatically dissolved and absorbed by the body, scraps cannot be left so as to avoid the delay of wound healing, and skin regeneration can be promoted. Moreover, the operation is simple, the safety is improved, and preparation processes are simplified. Required instruments are relatively common so as to be favorable for reducing the cost, and thus the nano chitosan has important application value in the field of artificial skin.

Polyurethane microparticles are derived from structural units comprising poly(alkylene oxide) moieties, caprolactone moieties and urethane moieties. The microparticles may include an active agent and have a particle size from 0.1 to 100 microns. Microparticles for injection have a particle size of 15 to 80 microns; for use as a aerosol 1 to 3 microns; and for intraocular use 0.02 to 2 microns. Dispersivity is in the range 1 to 3.

The invention discloses a preparation method of super absorbent resin for cables or optical cables. The preparation method comprises: adding a partially neutralized acrylic acid solution containing an initiator and a cross-linking agent into petroleum hydrocarbon containing an anionic-nonionic surfactant and a polymeric protective colloid for anti-phase suspension polymerization, to prepare the super absorbent resin which has high porosity and large specific surface area in the interior, has rapid water absorption rate and high swelling capacity, and is applied to the cables or the optical cables.

The invention discloses a polyvinyl alcohol film with the high swelling degree and a preparation method thereof. The polyvinyl alcohol film is prepared from a film preparing stock solution containing a polyvinyl alcohol polymer, polypropylene glycol, polyalcohol and a solvent, wherein after the polyvinyl alcohol film is infiltrated in 20-30-DEG C distilled water for 2-4 h, the highest swelling degree reaches 430%. The preparation method comprises the following steps that 1, the film preparing stock solution containing the polyvinyl alcohol polymer, polypropylene glycol, polyalcohol and the solvent is prepared; 2, the film preparing stock solution is tape-casted into a film and dried at constant temperature to obtain the polyvinyl alcohol film with the high swelling degree. Compared with the prior art, the preparation process is simple and easy to master, and the prepared polyvinyl alcohol film has the very high swelling degree and can be used as a raw material for manufacturing a polarizing film with the high polarizing property.

The present invention discloses an enzyme-loaded bacterial cellulose-based composite antibacterial hydrogel dressing and a preparation method thereof. A hydrogel layer is formed by free radical polymerization on a skeleton structure of bacterial cellulose to form an interpenetrating dual network structure by introducing a polymer of poly-N-isopropyl acrylamide, besides, the hydrogel layer is usedas a carrier to load a biological antibacterial agent, and thus the "ideal" medical wound hydrogel dressing with highly effective moisturizing and antibacterial functions is obtained. The obtained hydrogel dressing product has good swelling and mechanical properties, is relatively high in transparency, and a silicone layer plays a waterproof and breathable role and can maintain a closed and humidenvironment around wounds and in wound areas; and at the same time, the hydrogel layer has good actericidal and antibacterial properties to methicillin-resistant staphylococcus aureus and is conductive for resisting wound infections and promoting wound healing, besides, the skeleton material has a wide range of bacterial fiber raw materials, is low in price, good in histocompatibility and weak inantigenicity, does not cause foreign bodies, inflammation and rejection, and has good medical application prospects.

The invention belongs to the technical field of diaphragms, and particularly relates to a high-swelling-degree AFL, a preparation method of the high-swelling-degree AFL and a high-swelling-degree AFL ceramic diaphragm. The high-swelling-degree AFL comprises PMMA and PAN, wherein the outer layer of the PMMA is coated with the PAN, and the swelling degree of the PMMA is not lower than 90%. According to the high-swelling-degree AFL, the outer layer of PMMA with the swelling degree not lower than 90% is wrapped with PAN, so that the inner layer PMMA keeps higher swelling degree, and the situation that when the high-swelling-degree AFL is used for a lithium battery, PMMA continues to swell, so that the size is increased, and the performance of the lithium battery is affected, is avoided.