5results about How to "Reduce crosslinking" patented technology

The application belongs to the technical field of microcapsules, and particularly relates to a preparation method of a composite probiotic capsule, which comprises the following steps: uniformly mixing probiotic bacterial liquid, fructooligosaccharide, tea polyphenol, grape polyphenol, mannan oligosaccharide, isomaltitol and an emulsifier to obtain a core material; uniformly mixing glycerol and distilled water, heating to 60-80 DEG C, sequentially adding modified gelatin, hydroxypropyl starch and chitosan, stirring for 10-30 min, sterilizing, and cooling to room temperature to obtain a capsule material; mixing the core material and the capsule material, performing high-pressure homogenization treatment, and then performing spray drying to obtain the composite probiotic capsule; and the modified gelatin is prepared by acylation reaction of succinic acid derivatives and gelatin. The composite probiotic capsule provided by the application has excellent storage stability, antioxidant property, anti-gastric juice erosion capacity, and also has good enteric solubility and bioavailability.

This invention relates to a metal ion crosslinking stabilizer. It primarily addresses the problems of existing gel profile control agents, such as short gelation time, easy damage to medium and low permeability layers during injection, and inability to achieve deep reservoir sealing. Its components and proportions by mass percentage are as follows: 1%-2% retarder, 3%-5% reinforcing agent, 1%-3% regulator, 4%-5% ion stabilizer, 1%-2% water purifier, and the balance being water. Preparation method: 1) Add the ion stabilizer and reinforcing agent to water according to the proportions and mix evenly in a 45°C water bath; 2) Add the regulator to the mixture and mix evenly; 3) Add the retarder and maintain the water bath for 2-3 hours; 4) Add the water purifier to obtain the target product. This metal ion crosslinking stabilizer can be used as an auxiliary additive component in the formulation of polyacrylamide ion crosslinking profile control agent systems. It can prolong the gelation time of the profile control agent, ensure the gel viscosity of the profile control agent, improve the stability of the profile control agent, and achieve effective sealing of the system.

The application discloses a high desalination reverse osmosis membrane and a preparation method thereof, and belongs to the technical field of reverse osmosis membrane preparation. The method comprises the following steps: (1) a first intermediate membrane is obtained by casting a polysulfone film solution on a non-woven fabric layer and then solidifying; (2) the first intermediate membrane is immersed in an aliphatic biological amine solution, a first polyacyl chloride solution is poured onto the surface of the polysulfone porous layer, the membrane sheet is transferred to hot water to hydrolyze the acyl chloride groups into carboxyl groups, and a second intermediate membrane with a first polyamide layer is obtained; (3) the second intermediate membrane is immersed in a polybasic aniline solution, a second polyacyl chloride solution is poured onto the surface of the first polyamide layer, heat treatment is carried out after a certain time of reaction, and finally hot water is used for cleaning, and the high desalination reverse osmosis membrane is obtained. The application constructs a double-layer polyamide reverse osmosis membrane with gradient pore size and interfacial interlocking through a two-step differential interface polymerization process, has ultra-high desalination rate, high water permeation flux, excellent long-term stability and industrialization value, and is suitable for various water treatment scenes.

The invention discloses a donkey-hide gelatin cubilose with high water absorption rate and a preparation method thereof, and the preparation method of the donkey-hide gelatin cubilose comprises the following steps: carrying out steaming pretreatment on cubilose, and then carrying out freeze thawing treatment; soaking the treated cubilose in water until the cubilose is fully puffed; adding water into donkey-hide gelatin, heating and dissolving to form a donkey-hide gelatin solution And then adding the soaked cubilose into the donkey-hide gelatin solution for stewing, and immediately exhausting steam and cooling after heating is completed to obtain the donkey-hide gelatin cubilose product. By introducing a pretreatment process combining steaming and freeze thawing and matching with a reasonable stewing and cooling mode, the water absorption rate of the cubilose is effectively improved under the condition that the donkey-hide gelatin is added, and the problem of insufficient water absorption of a compounded product is improved; the obtained donkey-hide gelatin cubilose has the advantages of stable structure, full puffing, uniform texture, high nutrition compound degree and the like, and is suitable for industrial production, popularization and application of food.

The invention discloses a hydrogel-based composite film integrating efficient phase change cooling, high thermal conductivity, electromagnetic shielding and leakage prevention and a preparation method of the hydrogel-based composite film. The thin film is of a double-layer composite structure, wherein the lower layer is a high-thermal-conductivity electromagnetic shielding layer composed of polyacrylamide (PAM) hydrogel, Si3N4 and electromagnetic shielding filler, and the upper layer is a phase-change leakage-proof layer composed of PAM hydrogel and polyethylene glycol (PEG); the upper layer and the lower layer form a stable integrated structure through the synergistic effect of interface hydrogen bonds and physical entanglement, and finally integration of thermal management and electromagnetic protection functions is achieved. The phase change latent heat of the prepared film is larger than or equal to 120 J / g, the X-band electromagnetic shielding effectiveness (SE) is larger than or equal to 32 dB, and leakage is avoided at the high temperature of 80 DEG C. The preparation process is simple, and the product can be applied to various scenes such as power chips, LED equipment and wearable electronic devices.