37results about How to "Moderate water absorption" patented technology

The invention provides a probiotics microcapsule as well as a preparation method and application thereof. According to the preparation method, the microencapsulation preparation of probiotics cells iscarried out by virtue of a natural controlled release material with good biocompatibility, a high molecular material with pH value sensitivity and a mild process based on a microcapsule preparation technique of ruminants. By granulating microcrystalline cellulose blank pellet core as a pellet-granulated film-forming core granule, the problems of low sphericity degree and poor particle uniformityin the granulation process are effectively solved, and the effects of a dilution-adhesion-disintegration three-purpose agent are simultaneously considered. By utilizing a double-layer coating technique, the probiotics microcapsule can respectively resist the decomposition of rumen microorganisms and the erosion of true gastric acid, so that bacteria can reach the intestinal tract as much as possible, and the effective field planting of microorganisms in the intestinal tract of a milk cow. The method has the beneficial effects that the operation is simple, the industrial microencapsulation preparation can be realized through the double-layer coating of a fluidized bed, and a set of effective process parameters are established for the industrial production of coated probiotics cells.

The invention discloses a technology for preparing an agricultural drought-resistant water retaining agent, which belongs to the field of one of the agricultural drought-resistant water retaining technologies. The technology is mainly characterized by comprising the following steps of: initiating the polymerization of acrylic acid and acrylamide monomers by using a nanometer silicon dioxide-ammonium persulfate compound system under a low-pressure heating condition. The water retaining agent prepared by using the technology is quite strong in salt resistance (70-120 times in absorbing normal saline), and proper in water absorbency (300-500 times), can resist drought and retain water in soil, simultaneously does not compete for water with plants, does not harden, and therefore can be widely applied to the fields of agriculture and desertification control for drought resistance and water retaining.

The invention relates to a production method for watercolor writing and painting paper. The production method comprises the following steps: carrying out pulp preparation, carrying out papermaking by a paper machine, carrying out squeezing and drying before sizing, carrying out surface sizing, carrying out drying after sizing, carrying out slitting and packaging and the like. The production method selects 100% cotton pulp as a raw material and pulping treatment is performed by adopting a conical pulping machine; a fourdrinier multi-cylinder paper machine is used for carrying out the papermaking; needled felts with textures are mounted on upper and lower squeezing rollers of a positive pressure part of the paper machine respectively; in a squeezing and dehydration process, the textures of the felts are naturally transferred to surfaces of paper sheets to generate natural textures. The production method for the watercolor writing and painting paper is easy for processing and production; a technological process is simple and a formula of surface sizing liquid is simple; the production method is prone to operate and control and obtained product paper sheets have the natural textures and meet the characteristics of the watercolor writing and painting paper of water absorbability, washing resistance and scrubbing resistance, small deformation and long durability; and the production method is an ideal production method for the watercolor writing and painting paper.

The invention discloses a concrete internal curing agent, a preparation method and applications thereof, and belongs to the field of chemical synthesis. The preparation method comprises: 1) dispersingtwo emulsifiers in a dispersion medium at a room temperature to form an oil phase system, adjusting the neutralization degree of an anionic monomer aqueous solution, mixing the neutralized anionic monomer aqueous solution and a nonionic monomer aqueous solution, and adding a cross-linking agent and an initiator to form a water phase system; 2) under the protection of an inert gas, adding the water phase system into the oil phase system, and carrying out a reaction until a gel appears; and 3) taking the gel, washing, and drying to obtain the white powdery concrete internal curing agent. According to the invention, the concrete internal curing agent obtained by the preparation method is moderate in water absorption rate, integrates hydrophilic and alkali-resistant groups, ensures the moisture required by later hydration of cement, and reduces the negative influence on the strength of concrete after water release based on small particle size.

The invention discloses environment-friendly repeated-writing paper and a preparation method therefor. According to the environment-friendly repeated-writing paper and the preparation method therefor, a hydroxyl protective group is added into a nano bacterial cellulose suspension with excellent characteristics such as high water absorptivity and water retention ability and good water and air permeability, so as to lower hydrophilicity; a staged reaction is carried out under strong base conditions, so that bacterial cellulose reaches moderate water absorptivity and water retention ability, ink can only be present in a surface layer and be clear in writing while the ink is absorbed, and thus, writing, reading and subsequent handwriting wiping are facilitated; then, a scientifically-compounded dispersant is added, and ultrasonic and high-voltage pulse electric field combined dispersion is carried out, so that a stable and uniform modified bacterial cellulose suspension is obtained; finally, the surface of raw paper is coated with the suspension so as to obtain the writing paper with appropriate ink absorbing uniformity and adhesive power and a dense structure, thus, the writing property of the writing paper can be enhanced, and the clearness of writing is enhanced; and waterproofing and oil-proofing actions can be achieved, most importantly, ink marks on the paper can be erased with a cleanser and the paper can be reused for 40 to 100 times under the condition that the performance of the paper is not affected.

The invention discloses a fresh potato non-fried convenient hot dry noodle and a preparation method thereof. Thehot dry noodle comprises flour, fresh potatoes, salt, sodium carbonate, composite phosphate, gluten powder, sodium alginate and monoglyceride at a certain proportion. The preparation method comprises the following steps: (1) preparation of the fresh potatoes: washing potatoes with no decay and deterioration, peeling, cutting the potatoes into slices, putting the potato slices into a steamer and steaming; putting the steamed potato slices into a mortar, grinding the potato slices into a mud shape, putting the grinded potato mud into microwave and drying; (2) preparation of fresh noodles: uniformly mixing the obtained potato mud, kneading a dough, proofing under room temperature, putting formed noodles into a pot and boiling; (3) drying of the noodles: microwave drying the obtained fresh noodles. Thepreparation method has the advantages that the formula is reasonable, the energy consumption is reduced, and the production cost is lowered; more flavors and nutrients are endowed to the hot dry noodle. The fresh potato convenient hot dry noodle is non-fried, so that the safety and the preservability are greatly improved.

The invention discloses film-coated base paper and a production process thereof. The process comprises the steps: mixing chemi-mechanical pulp, needle leave pulp, broad leave pulp and waste stuff to obtain film-coated base paper core layer pulp; mixing the needle leave pulp and broad leave pulp to obtain a surface layer pulp; mixing the needle leave pulp and the broad leave pulp to obtain surface layer pulp bottom layer pulp; facilitating the three parts of pulp to enter a pulp flow box by virtue of a quantization pump and then enter a net part to be composited, and then sequentially squeezing, drying, gluing, drying, press polishing to obtain a finished product. On the premise of guaranteeing the product quality, by improving the pulp proportion and the process, the waste stuff is added into the traditional process formula, so that the use amount of the chemi-mechanical pulp can be increased, the use amount of the broad leave pulp and the needle leave pulp can be reduced, and particularly the use amount of imported pulp can be reduced.

A transfer paper for printing on cotton fabric is composed of paper, isolating layer and dye layer. Its preparing process includes such steps as concentrating sodium silicate glass liquid, coating it on paper, baking, regulating the pH value of dye slurry to 4-5, printing the patterned dye layer on the surface of dried sodium silicate glass layer, and chemical reaction to generate an isolating layer between them.

The invention discloses a preparation method of frosted raw paper. The preparation method comprises the following process steps: firstly, mixing coniferous wood chips with broadleaved wood chips; thenperforming pulping; beating pulp again, proportioning pulp and adding auxiliaries; making wet paper sheets; performing prior drying; performing coating and glue application; performing post-drying. The frosted raw paper prepared by the method disclosed by the invention has the advantages of high quality of a product, high mechanical performance index, stable thickness, high evenness of paper sheets, and good oil-ink fixing performance; moreover, quality requirements of clients can be met.

The invention provides antibacterial purple sand which takes a purple sand base material and an antibacterial material as raw materials, the antibacterial material takes tetrapod-like zinc oxide, ethylene glycol polyoxyethylene ether, lanthanum oxide and cerium oxide as main raw materials, and the antibacterial purple sand is prepared by the following steps: dissolving lanthanum oxide and cerium oxide and then adjusting the pH value to 7-9. after combustion, adding into a turbid liquid composed of tetrapod-like zinc oxide, ethylene glycol polyoxyethylene ether and water, drying, firing, and grinding with a composite additive and ethylene glycol polyoxyethylene ether to obtain the product. The purple sand base material and the antibacterial material can be well fused, the obtained antibacterial purple sand has good antibacterial performance, the antibacterial performance on staphylococcus aureus reaches 99.99%, the forming performance and using performance of the purple sand are not affected due to addition of the antibacterial material, and the obtained antibacterial purple sand is moderate in water absorption rate, the thermal shock resistance is good, lead and cadmium are not contained, the deformation of the product is small, leakage is avoided, and the use performance is good.

The invention relates to a preparation method of an acid-base double-layer core-shell nanotube/SPEEK composite proton exchange membrane. The method prepares an acid-base double-shell nano tube by a continuous two-step distillation-precipitation polymerization method, PMAA is selected as an inner shell polymer because the PMAA has a carboxylic group and has a high hydration energy and water absorbing capacity, PVI is selected as an outer shell polymer to enhance the dispersity of the nano tube in the matrix and optimize the proton transfer carrier so as to improve the proton conductivity. The preparation method provided by the invention can overcome the problems that an SPEEK membrane is poor in mechanical property caused by easy water loss or easy swelling in water under the high temperature and the low humidity, and ensures the high proton conductivity, high water retention and good dimensional stability of the composite PEM.

The invention belongs to the field of building materials, in particular to a cement ceiling board and a preparation method thereof. The cement ceiling board is composed of polypropylene fiber mesh cloth and cement boards, wherein the polypropylene fiber mesh cloth is laid between the cement boards to form a cement ceiling board composed of upper, middle and lower layers. The present invention lays the polypropylene fiber mesh cloth in the middle of the cement board when preparing the cement ceiling board. When the thickness of the prepared cement ceiling board is relatively thin, the cement board can be provided with good flexural strength, and the cement board can be avoided during processing. The board is easily broken, so cement can be used to make ceiling boards, and the prepared ceiling boards are light in weight and easy to process and install.

The invention discloses a production technology of a pulp board. The production technology of the pulp board comprises the following steps: sequentially and continuously cooking by virtue of a sulphate process, carrying out oxygen delignification treatment, and carrying out chlorine dioxide bleaching to obtain reed pulp; carrying out a production technology combining alkaline hydrogen peroxide pretreatment with defibrination chemical treatment to obtain poplar chemi-mechanical pulp; blending 15-30wt% of the obtained reed pulp with 70-85% of the obtained poplar chemi-mechanical pulp to obtain slurry without adding auxiliary materials, colour mixing or gluing; and carrying out wire section moulding on the obtained slurry according to a jet-wire speed ratio of 1.0+/-0.01 and wire loading concentration of 0.9-1.5%, so that the pulp board is obtained. The production technology of the pulp board is simple and low in manufacturing cost and has the environment-friendly advantage, and the pulp board produced by adopting the production technology is good in strength, moderate in water absorption property, strong in air permeability, flat and rough and bright in colour.

The invention relates to a preparation method of an oligosiloxane composite proton exchange membrane containing an azole ring. The method comprises the following steps: adding a first monomer to reactwith a second monomer to obtain a third monomer; under the action of an initiator, reacting the third monomer with a fourth monomer to obtain an oligosiloxane nano-filler PGA containing an azole ring; mixing the PGA with a matrix, casting the obtained mixed solution onto a glass plate, and drying to obtain a composite film (SPEEK/PGA-X). The high-performance and low-cost proton exchange membraneobtained by the invention can be widely applied to fuel cells, and has important significance and key effects on reducing the cost of the fuel cells, perfecting an upstream industrial chain of the fuel cells and promoting the development of the field of new energy.