484 results about "Moisture retention" patented technology

The invention belongs to the technical field of biology, and discloses a stable protective agent, a cell antigen dry sheet and a preparation method and application of the dry sheet, the stable protective agent comprises glycerin with the volume fraction being 0.4%, gelatin with the mass volume fraction being 0.1%, EDTA with the mass volume fraction being 0.1 mM, trehalose with the mass volume fraction being 0.03% and resveratrol with the mass volume fraction being 100 [mu] M. The stable protective agent is adopted for preparing the cell antigen dry sheet, and the cell antigen dry sheet is applied to CBA detection. The stable protective agent has good permeability, can penetrate through cell membranes to enter cells, provides a protection effect inside and outside the cells, has moisture retention and oxidation resistance, can prevent cell deformation and cell fixing layer shedding, and can well maintain the stability and reliability of antigen proteins, and the prepared cell antigen dry sheet can be stored for a long time, and has a good application prospect. The antigenicity of a membrane signal index is not damaged. When a positive sample is detected, obvious green fluorescence cells can be seen, red fluorescence quenching is avoided, and co-localization of red fluorescence and green fluorescence can be observed conveniently.

The present invention provides a phycocyanin-collagen composite hydrogel and its preparation method and application. The present invention utilizes transglutaminase to catalyze the combination of phycocyanin and collagen to form a new, more stable collagen; transglutaminase acts between protein molecules, utilizes lysine and glutamic acid in phycocyanin and collagen to transfer acyl groups, and cross-links to form new chemical bonds, thereby enhancing the binding strength of phycocyanin and collagen; the hydrogel prepared by the present invention can be used to prepare medical materials and combined with skin injury sites to solve the problem that traditional dressings are easy to adhere to wounds and easily penetrated by tissue fluid and become infected. In addition to ensuring basic air permeability, it reduces the adhesion of the dressing, increases moisture retention and antioxidant properties, and avoids secondary damage when replacing a new dressing. The hydrogel prepared by the present invention has a certain antioxidant capacity and can be used to prepare products with antioxidant effects.

The utility model relates to the field of medical skin grafting materials, in particular to an auxiliary tool for MEEK skin grafting, which comprises a water-absorbing sponge in the shape of a square block and used for bearing a skin graft to be cut and to be grafted; the folding sheet comprises a gauze layer and an aluminum foil layer which are stacked together, a plurality of transverse wrinkles and longitudinal wrinkles are arranged on the folding sheet, and a skin carrying sheet area consistent with the water absorption sponge in length and width is arranged between the transverse wrinkles and the longitudinal wrinkles. The biocompatibility is good, the moisturizing performance is good, operation of clinicians is facilitated, and the risk of patients is reduced.

The invention provides a bio-based composite liquid mulching film and a preparation method thereof. The bio-based composite liquid mulching film comprises a nanocellulose solution, modified starch, modified chitosan, glycerol and calcium carbonate, the modified starch is obtained by modifying starch with citric acid; the modified chitosan is obtained by grafting and copolymerizing chitosan with an acrylic monomer. According to the invention, a plurality of bio-based components such as modified starch, modified chitosan, a nanocellulose solution, glycerol and calcium carbonate are integrated, and natural characteristics of bio-based materials are utilized to form a uniform and degradable film layer; the soil moisture retention film can better isolate air and moisture loss, improves the soil moisture retention ability, ensures sufficient strength and flexibility in the application process, and avoids the problems of early cracking or deformation and the like.

The present invention relates to the field of plastic films, and in particular to an agricultural plastic film and a preparation method thereof. The agricultural plastic film is composed of the following components in parts by mass: 95-105 parts of film particles, 2-4 parts of modified nano-titanium dioxide emulsion, 6-10 parts of lignin nanoparticles, 2-4 parts of tannic acid, 6-10 parts of glycerol, 4-6 parts of maleic anhydride-grafted polycaprolactone as a co-solvent, and 4-6 parts of cellulose nanocrystals. Compared with the prior art, the present invention achieves comprehensive improvement in material degradability, anti-aging performance and processing efficiency, while taking into account production cost optimization and process adaptability. The agricultural plastic film can be widely used in agricultural scenarios such as greenhouse covering and soil moisture retention, has significant advantages in reducing environmental pollution and improving the comprehensive performance of agricultural films, and has broad application prospects.

The invention discloses a paper base-PHA double-sided composite soil biodegradable agricultural mulching film as well as a preparation method and application thereof, and belongs to the technical field of agricultural mulching materials and green high polymer materials. The mulching film comprises a paper base layer and a homologous polyhydroxyalkanoate covering layer arranged on the surface of the paper base layer. Through double-sided synergy of the water-based PHA coating on the soil sticking surface and the thermoplastic PHA extrusion film layer on the windward and rainy surface, and in combination with a'wet-to-heat 'integrated composite process and trace anhydride grafting, super-strong combination of a paper-plastic interface fiber tearing level is realized, and the problem that traditional paper-plastic is easy to layer is solved. Compared with a traditional fluorine-containing product, on the premise that total organic fluorine is not detected, the excellent barrier and moisture conservation performance is achieved with the thinner coating thickness by means of double barriers. The product has excellent mechanical laying adaptability and long-season weather resistance, is fully biodegradable, thoroughly solves the hidden dangers of micro-plastic residues and persistent organic pollutants, and is an ideal green agricultural covering material.

The invention relates to the field of food engineering, in particular to modified composite whey protein isolate-corn protein gel as well as a preparation method and a product thereof. The preparation method comprises the following steps: mixing and stirring different amounts of whey protein isolate and water, adjusting the pH value to 12 by using NaOH, adding corn protein, standing to form gel, soaking in hydrochloric acid to adjust the pH value, flushing, refrigerating and the like. A large number of experiments show that when the mass ratio of whey protein isolate to corn protein is 8: 2, the gel has the best properties such as strength, moisture retention capacity and rheological property. The protein proportion is accurately controlled, the gel structure and functional characteristics are optimized, technical support and theoretical basis are provided for development of novel functional gel in the food industry, and the method can be used for development of food additives for improving food texture and taste.

The invention discloses a solid ultrasonic gel patch as well as a preparation method and application thereof, and belongs to the technical field of medical chemistry. The solid ultrasonic gel patch is prepared from an acrylamide monomer, polyvinyl alcohol, sodium polyacrylate, sodium carboxymethyl cellulose, nano silicon dioxide, propylene glycol, glycerol, acrylic acid, triethanolamine, a cross-linking agent, an initiator and water according to a specific ratio. The prepared solid ultrasonic gel patch is highly matched with human soft tissue in acoustic impedance (about 1.62-1.63 * 10 < 6 > Pa.s / m), low in acoustic attenuation coefficient (less than or equal to 0.034 dB / (cm.MHz)), moderate in skin adhesion, excellent in flexibility and moisture retention, capable of solving the problems that a traditional ultrasonic coupling agent is inconvenient to use, easy to dry, poor in experience and the like, and suitable for acoustic wave conduction in ultrasonic examination and treatment.

The utility model relates to the technical field of mining area restoration, in particular to a grass planting bag for regreening and restoration of a mining area, which comprises at least one grass planting unit, and each grass planting unit comprises a grass planting bag layer, a fiber cotton layer and a breathable soil restoration layer which are sequentially arranged from top to bottom. The grass planting wrapping layer is filled with grass seeds and matrix soil, and the breathable soil restoration layer is filled with ceramsite and soil restoration nutrient organic matter in a staggered mode. According to the grass planting bag for re-greening and repairing the mining area, the grass planting bag layer is filled with the grass seeds and the matrix soil, the fiber cotton layer is arranged in the middle, and the two layers are comprehensively overlaid, so that the grass planting bag has the advantages of heat preservation, moisture preservation, water retention, degradability and high air permeability, the germination and survival rate of the grass seeds can be increased, and the rapid re-greening effect in the arid and semi-arid mining repairing area is achieved; furthermore, ceramsite and soil remediation nutrient organic matters are filled in the breathable soil remediation layer in a staggered manner, so that the remediation of the soil in the mining area can be further realized.

The invention discloses a PLC (programmable logic controller) control type film-laying and pipe-laying straight-insertion precision seeding all-in-one machine, and belongs to the technical field of seeders, the PLC control type film-laying and pipe-laying straight-insertion precision seeding all-in-one machine comprises a machine body and a seed storage unit assembled on the machine body, one side of the machine body is connected with a film-laying unit and a pipe-laying unit through an extension frame, a straight-insertion assembly is assembled on the extension frame, and the straight-insertion assembly comprises a synchronous frame inserted on the extension frame; a first electric hydraulic push rod of which one end is connected with the synchronous frame is mounted in the middle of the extension frame; through the arrangement of the film laying unit, the pipe laying unit and the direct insertion unit, the functions of film laying, pipe laying, sowing and film breaking are integrated, full-process mechanical operation is achieved, traditional manual operation is replaced, the labor cost and time investment are greatly reduced, and the machine is particularly suitable for large-scale planting scenes; the air permeability and moisture retention are balanced, oxygen deficit caused by soil hardening is prevented, the situation that seedlings are scalded due to the fact that the mulching film is not broken in high-temperature weather can be avoided as much as possible, and the crop survival rate is increased.

The invention relates to a preparation method of a mixture of sorghum starch and caffeic acid. The preparation method is characterized by comprising the following steps: mixing water, sorghum starch and caffeic acid to prepare a sorghum starch-caffeic acid mixed solution; then carrying out microblog treatment on the sorghum starch-caffeic acid mixed solution; after the treatment is finished, cleaning with an ethanol solution to remove free caffeic acid components in a reaction system, and centrifuging to take white precipitate at the lower layer; and freeze-drying to obtain a mixture of sorghum starch and caffeic acid. The SS-CA compound provided by the invention has a more stable gel continuous phase in the aging process. At the same aging time point, the moisture distribution of the SS-CA composite system has a lower free water peak area proportion, and the moisture retention capability is improved.

The application discloses an anti-wrinkle composition containing recombinant collagen as well as a preparation method and application thereof, and belongs to the technical field of cosmetics and skin care products. The composition contains the following active ingredients in percentage by mass: 0.01%-20% of recombinant humanized type I collagen, 0.01%-20% of recombinant humanized type III collagen, 0.01%-10% of recombinant humanized type XVII collagen, and 0.01%-20% of space-bred desert algae extract. The three kinds of recombinant humanized collagens and the space-bred desert algae extract form a complex system, and when the total mass ratio is in a specific interval of 1.3:1-4:1, the three kinds of recombinant humanized collagens and the space-bred desert algae extract can synergistically improve the skin barrier function. Based on the synergistic mechanism of the complex system, the composition disclosed by the application can effectively promote the skin moisture retention and anti-wrinkle ability, repair the skin barrier, and is suitable for the development and application of skin care products for anti-wrinkle, skin tightening and skin aging delay.

The invention belongs to the technical field of food processing, and particularly relates to a method for preparing frozen noodles by treating wheat flour with superheated steam, which comprises the following steps: treating wheat flour with superheated steam, crushing, sieving, and mixing with untreated wheat flour to obtain compound wheat flour; adding water and seasonings into the compound wheat flour to prepare dough, and fermenting to prepare raw noodles; and freezing and preserving the raw noodles. The wheat flour is modified by adopting a green and additive-free superheated steam continuous treatment method with a simple process flow, and the prepared noodles are good in texture quality and taste quality, stable in texture, taste, moisture retention capability and cooking loss performance in multiple freezing and thawing cycles, still good in appearance quality and texture quality after multiple freezing and thawing cycles, and good in taste. The quality of frozen noodle products in the storage and transportation processes can be maintained, and the circulation adaptability is improved.

The invention discloses a composition based on centella asiatica extract and olive extract and application of the composition in mask cloth, and relates to the technical field of cosmetics. Comprising the following raw materials: modified olive dispersion liquid, caprylic capric triglyceride, nano titanium dioxide dispersion liquid, chitosan quaternary ammonium salt, hyaluronic acid, modified centella asiatica extract, centella asiatica nanocrystals, silk fibroin composite liquid, epsilon-polylysine and deionized water. The prepared composition based on the centella asiatica extract and the olive extract effectively improves the transdermal absorption rate and stability of active ingredients such as asiaticoside and oleuropein in the extract, and can greatly improve the tensile strength, moisturizing time and skin adhesion of mask cloth when being applied to the mask cloth. Therefore, the composition based on the centella asiatica extract and the olive extract prepared by the invention has a wider application prospect.

The utility model relates to an inner frame paper cigarette packet packaging device, and belongs to the technical field of cigarette packet packaging. The device comprises a moisture retention film conveying unit and an inner frame paper cigarette packet packaging unit. The inner frame paper cigarette packet packaging unit comprises a forming wheel, and the forming wheel is provided with a plurality of mold boxes used for folding a single moisturizing film on an inner frame paper cigarette packet in a U shape. A driven piece is installed on the side face of the forming wheel, the right end of the driven piece is connected with a folding piece, and the driven piece is matched with the cam so that the folding piece can push the single moisture preservation film to be folded at the side corner of the top of the inner frame paper cigarette packet. A movable upper folder is arranged at the position close to the rear upper part of the forming wheel so as to push the single moisture retention film to be folded at the upper long edge of the bottom of the inner frame paper cigarette packet; a fixed arc-shaped folding plate is arranged at the position close to the rear lower portion of the forming wheel so as to push the single moisture retention film to be folded on the lower long edge of the bottom of the inner frame paper cigarette packet. The inner frame paper cigarette packets are packaged in a mechanical and intelligent mode, the sealing effect is good, and the efficiency is high.

The invention provides a method for preventing and controlling nitrogen and phosphorus loss of sandy and dry cultivated land based on EICP root reinforcement and relates to the field of soil ecological protection and agricultural pollution prevention and control. According to the method, a three-dimensional prevention and control system is formed from the two dimensions of surface layer film covering protection and deep root system soil fixation through the synergistic effect of EICP film covering and local plant root system three-dimensional reinforcement, wind erosion and water erosion are effectively resisted, the soil nitrogen and phosphorus loss rate of the large-gradient sandy and dry cultivated land is remarkably reduced, and meanwhile the soil desertification process is slowed down; the EICP film covering layer has good water permeability and moisture retention, nitrogen and phosphorus loss can be prevented, rainfall infiltration and soil moisture conservation can be guaranteed, and the germination rate and the growth speed of crops are increased; according to the method, local crop root system reinforcement is selected, the original planting structure is not disturbed, the economic benefit of cultivated land yield per mu is guaranteed, a harmless means of combining microorganisms, geotechnical engineering and agricultural planting is adopted, external pollution sources are not introduced, original basic characteristics of soil are not damaged, and the requirement for ecological protection of the Yellow River basin is met.

The invention provides a structure and a production process of a wet tissue material and a sanitary towel liquid absorption material in the hygienic product industry, and relates to the technical field of hygienic products, the structure comprises a first hydrophilic solvent layer, a first PP melt-blown material layer, a middle functional layer and a second PP melt-blown material layer which are arranged in sequence, and a second hydrophilic solvent layer is further arranged on the outer side of the second PP melt-blown material layer; when the material is a sanitary towel liquid absorption material, the middle functional layer is a mixed layer of a PP melt-blown material, wood pulp and macromolecules; when the material is a wet tissue material, the middle functional layer is a mixed layer of a PP melt-blown material and wood pulp, the proportion of the raw materials can be adjusted, and the middle functional layer is used for manufacturing products such as urine pads, kitchen dry tissues, pet pads and dust-free paper; through the composite structure design of the PP melt-blown material and the wood pulp / wood pulp-macromolecules and the hydrophilic modification treatment of the outer layer, the overall tensile strength is effectively enhanced, and the problem of tearing or layering in use is avoided; the material softness is improved, and the material is more fit and comfortable; the moisture retention performance and the liquid absorption diffusion speed of the material are optimized, it is guaranteed that the wet tissue can keep moist for a long time, and the sanitary towel can rapidly and evenly absorb liquid.

The invention discloses a freckle-removing mask preparation method and equipment, and relates to the technical field of beauty and skincare, the freckle-removing mask preparation method comprises the following steps: S1, selecting and purchasing: selecting and purchasing high-quality formula raw materials; s2, inspection: inspecting the purchased raw materials; s3, pretreatment: washing part of the Chinese herbal medicine raw materials with clear water, and drying the Chinese herbal medicine raw materials; s4, pre-processing: crushing and grinding the prepared raw materials, and screening and filtering to remove impurities; the facial mask is prepared from ligusticum, radix angelicae, radix asparagi, astragalus membranaceus, bighead atractylodes rhizome, silkworm larva, bletilla striata, radix paeoniae alba, poria cocos, salvia miltiorrhiza, ampelopsis japonica, tribulus terrestris, pseudo-ginseng, rose, ginseng, honeysuckle, pearl and other blood-activating and repairing components, so that the effect of eliminating laser spots and heavy metal residual spots is improved, and meanwhile, the whitening degree and the skin glossiness are improved; the ductility, the moistening property and the permeability are improved, the stickiness and the greasiness are reduced, the moisturizing and water locking durability is improved through moisturizing factors of various components, and the spot fading effect is improved.

The invention discloses a gastrodia elata planting method with coco coir as a matrix. The gastrodia elata planting method aims at solving the problems that in traditional soil planting, the weight is large, hardening is prone to occurring, moisture preservation and air permeability are poor, and efficiency is low. The method comprises the following steps: selecting commercial coco coir of which the particle size is 0.05-5mm, the coarse particle size is less than or equal to 30% and the fine particle size is more than or equal to 40%, and pre-treating for more than or equal to 2 hours by steam sterilization at The method comprises the following steps: planting according to the proportion of 0.3 cubic meter of coconut coir, 80 jin of fungus materials or artificial fungus sticks for replacing the fungus materials and 1 jin of hemp seeds per square meter, and controlling the initial moisture content to be 50-60% and the growth period to be 40-45%. Experiments show that the water-holding capacity of the coco coir is 350-380%, the air permeability porosity is 29-33.2%, the yield per mu reaches 1600-2800kg in 2023-2024, compared with soil planting, the yield is obviously increased, the rotten hemp rate is reduced to 3-7%, and the labor efficiency is improved by about 50%.

The invention provides a waste potato-derived fulvic acid slow-release full-degradable mulching film as well as a preparation method and application thereof, and belongs to the technical field of agricultural environment. Waste potatoes are prepared into a solution, then the solution is compounded with potassium sulfate, tartaric acid and fulvic acid according to a certain proportion to form a mixed solution, and the waste potato source fulvic acid slow-release type fully-degradable mulching film is prepared through uniform spreading and microwave irradiation. According to the invention, resource utilization of the waste potatoes is realized; meanwhile, the prepared mulching film is good in mechanical performance, and the actual application requirement is met. The prepared mulching film has good heat preservation and soil moisture conservation effects, fulvic acid is slowly released, and the film-fertilizer dual-function effect is achieved. In addition, after the mulching film is degraded, soil components are improved.

The invention belongs to the technical field of medical or hygiene materials, and particularly relates to a medical human body lubricant and a preparation method and application thereof.The medical human body lubricant is prepared from, by mass, 1%-20% of glycerin, 1%-20% of propylene glycol, 0.1%-1% of hydroxyethyl cellulose, 0.05%-0.5% of carbomer, 0.05%-0.5% of sodium polyacrylate, 0.05%-0.5% of triethanolamine, 0.2%-1% of preservative and the balance purified water. The medical human body lubricant prepared by the invention has high moisture retention, is mild and non-irritant, and is suitable for people sensitive to skin.

The utility model discloses an improved leaf disc method device which comprises a round container with an opening in the upper end, a moisturizing material layer is placed in the round container, a filter paper layer is arranged on the surface of the moisturizing material layer in an attached mode, a plurality of leaf placing areas are distributed on the surface of the filter paper layer in an annular array mode, and an observation area is arranged in the center of the surface of the filter paper layer. A protective ring is arranged above the circular container, and the depth of the circular container is larger than the sum of the thickness of the moisturizing material layer and the thickness of the filter paper layer. According to the utility model, the accuracy and the efficiency of experiments are obviously improved by improving the air permeability, the activity space and the moisture retention performance. Due to the design of the blade placing area and the observation area, man-made interference and errors are reduced, and the repeatability of the experiment is improved. The problems that in a traditional method, air permeability is poor, the activity space is small, observation is inconvenient, the moisturizing performance is poor, and leaf placement is not standard are solved. A more stable experimental environment is provided, and interference on insect behaviors is reduced.

The invention discloses a photosensitizer, dynamic antibacterial hydrogel containing lipidosome wrapping the photosensitizer and a preparation method and application of the dynamic antibacterial hydrogel, and belongs to the technical field of biological materials. The invention provides a novel D-A-D type photosensitizer TPT which is simple in structure and simple in synthetic route, and from the angles of safety, practicability and use specificity of hydrogel dressing, modified hyaluronic acid and modified carboxymethyl chitosan are used as raw materials, cationic liposome wrapping the novel photosensitizer TPT is carried, and the hydrogel dressing is prepared. The efficient antibacterial dynamic cross-linked hydrogel material is prepared. The hydrogel disclosed by the invention has two pH response bonds, namely an imine bond and a boric acid ester bond, and has good moisture retention and biocompatibility; meanwhile, the hydrogel is loaded with the cationic liposome wrapping the novel photosensitizer TPT, so that the hydrogel has excellent active oxygen yield. The hydrogel disclosed by the invention aims to quickly resist bacteria, promote wound healing, reduce infection risk and improve the success rate of treatment through the targeted drug release function of the intelligent hydrogel.

The utility model relates to the technical field of slope protection structures, in particular to an ecological slope protection structure. According to the technical scheme, the device comprises two sets of cross protection frames, each set of cross protection frame comprises a cross protection plate, a connecting table is arranged at the end corner position of one end of each cross protection plate, and a protection pier is arranged at the end corner position of the end, away from the connecting table, of each cross protection plate; a lower side plate frame and an upper side plate frame are arranged on the sides, close to each other, of the fender piers on the two sets of crossed protective frames correspondingly. The cross protection frame, the lower side plate frame and the upper side plate frame are integrally arranged in the shape of the inclined plane rhombus, so that the slope protection frame can be better matched with a sloping field, meanwhile, the rhombus structure can provide a better drainage effect, water retention on the slope surface can be reduced, landslide or soil erosion caused by accumulated water is avoided, and the slope protection effect is improved. Meanwhile, flexible adjustment can be achieved according to different terrains and gradients, different slope protection requirements are met, the self-locking performance and stability are high, external pressure and stress can be effectively dispersed, and slope landslide or collapse is prevented.

The utility model relates to the field of human life necessity provides a kind of moisture-absorbing and breathable fabric and clothing, moisture-absorbing and breathable fabric is formed by minimum weaving unit four-side expansion weaving;Minimum weaving unit is provided with check area, breathable area and weaving area;The stitch point structure in weaving area is formed by compound yarn, and the compound yarn includes moisture-absorbing filament and the profiled section polyester filament that is mixed twist with moisture-absorbing filament to form breathable port, and moisture-absorbing filament can be regenerated polyester Rpet fiber yarn, organic cotton yarn, odayer fiber yarn or yaxier fiber yarn etc..Through the mixed twist of profiled section polyester filament and moisture-absorbing filament, can form breathable port by profiled structure, and then through the weaving fabric of compound yarn, good breathability can be formed, the improvement of breathability can faster take away moisture, keep the dry of moisture-absorbing and breathable fabric, improve the comfort of wearing.

The invention discloses an automatic humidity control and soil moisture preservation device for fruit and vegetable seedling hole trays, which comprises a soil moisture preservation bottom frame, cover body frameworks are arranged on the soil moisture preservation bottom frame, a flexible transparent upper cover is arranged between the two cover body frameworks, a water collection tank and water storage tanks are arranged outside the upper side of the flexible transparent upper cover, and a humidification pipe is connected between the two water storage tanks. Electric control valves are arranged at the two ends of the humidifying pipe, a plurality of seedling raising trays are arranged on a transverse supporting plate of the soil moisture preservation bottom frame, chamber doors and ventilation and heat dissipation holes are hinged to inlets and outlets in the two ends of the soil moisture preservation bottom frame, and the ventilation and heat dissipation holes are provided with lifting baffles through lead screws, guide rods and lifting sliding blocks. The water collecting tank and the water storage tanks are arranged on the outer portion of the upper side of the flexible transparent upper cover, rainwater and dew can be collected and stored, then spraying humidification treatment is conducted on the multiple seedling raising trays placed on the soil moisture preservation bottom frame through the humidification pipe connected between the two water storage tanks, the humidification and moisture preservation effects are good, and irrigation water can be saved conveniently.

The present invention discloses an ecologically friendly disposable product, particularly for packaging and other diverse applications. The matrix of the product is primarily composed of moss and plant materials, offering a significant environmental benefit due to its complete biodegradability, eliminating the issue of plastic pollution and landfill. The unique composition of the product provides antibacterial, antiseptic, and anti-fungal properties, thus enhancing its shelf life and mitigating spoilage concerns. The product demonstrates impressive moisture retention capabilities lasting up to 8-12 hours, remarkable durability, remaining resistant to low temperatures, ultraviolet light, and alcohols, ensuring its functionality in a wide range of environmental conditions. This innovative product is not only highly functional but also adaptable, boasting a flexible design that caters to specific use cases. Notably, the production process includes the utilization of minimally processed nature-based ingredients from the food / wood industry side stream, maintaining the manufacturing process with low costs.

The invention relates to a gas diffusion layer, a preparation method thereof and a membrane electrode assembly, and belongs to the technical field of fuel cells. The gas diffusion layer comprises a first fiber material and a second fiber material, and the first fiber material and the second fiber material are stacked and assembled according to an alternating distribution sequence; wherein the porosity of the first fiber material is 55-60%; the porosity of the second fiber material is 65-70%; the total number of the gas diffusion layers is at least six. The gas diffusion layer can rapidly drain water under a high-humidity condition, and has relatively strong moisture retention performance.

A method for manufacturing a mask pack sheet comprises: a step of preparing a biodegradable hollow fiber and a regenerated cellulose-based non-woven fabric comprising the biodegradable hollow fiber; a step of establishing optimal conditions by varying a mixing ratio of yarns and hydroentanglement conditions for the prepared non-woven fabric, the optimal conditions comprising a liquid absorption of 17-18 g / g, a liquid retention of 13-14 g / g, and a moisture retention rate of 60-70%; and a step of manufacturing with a tensile strength of 60-70 N / 1.5 cm² in a first direction, an elongation of 10-20%, a tensile strength of 9-20 N / 1.5 cm² in a direction perpendicular to the first direction, an elongation of 75-90%, and a thickness of 0.2-1 mm, wherein the step of manufacturing with a thickness of 0.2-1 mm comprises the steps of: mixing 60-80% of general regenerated cellulose fibers and 20-40% of biodegradable hollow fibers; forming a first non-woven fabric sheet by combing and loosening the mixed first fibers in a first direction; forming a second non-woven fabric sheet identical to the first non-woven fabric sheet by combing and loosening the mixed first fibers in the first direction; disposing the second non-woven fabric sheet on the first non-woven fabric sheet in a second direction perpendicular to the first direction; forming a mask pack sheet by hydroentangling the first non-woven fabric sheet and the second non-woven fabric sheet in a state in which the first and second non-woven fabric sheets are perpendicularly disposed; and drying and winding the mask pack sheet formed by hydroentangling.

The invention relates to the technical field of irrigation and water conservancy engineering, and discloses a karst mountainous area water retention and stabilization zoned ridge construction method and a ridge, and the method comprises the following steps: S1, digging a foundation trench along a ridge line of a pre-built upper terrace; s2, a load-bearing outer slope body surrounding the upper terrace is built in the foundation trench, and a through drainage hole is formed in at least one lateral section of the load-bearing outer slope body; s3, laying an inverted filter layer on the inner side of the bearing outer slope body; s4, the inner side of the inverted filter layer is filled and tamped with clayed soil in a layered mode, and an anti-seepage soil core wall is formed; s5, the bottom of the foundation trench in the area defined by the anti-seepage soil core wall is backfilled with planting soil; according to the construction method of the zoned ridge for water retention and stabilization in the karst mountainous area and the ridge, the series of problems that the ridge in the karst mountainous area cannot be stabilized, cannot be stored and cannot be drained smoothly are solved, and structural stability, efficient moisture retention and smooth drainage of the ridge in the karst mountainous area under complex hydrogeological conditions are achieved.