64 results about "GRAPEFRUIT PEEL" patented technology

The invention discloses a carbon aerogel / reduced graphene oxide double-framework composite phase change material based on shaddock peel as well as a preparation method and application of the carbon aerogel / reduced graphene oxide double-framework composite phase change material. According to the method, the carbon aerogel / reduced graphene oxide double-framework material (CPA-rGO) with a hierarchical pore structure is constructed by taking waste shaddock peel as a raw material through freeze drying, a layer-by-layer self-assembly (LbL) technology and a gas-phase reduction and high-temperature carbonization process. And then, loading n-octacosane in the porous skeleton by a vacuum-assisted impregnation method to form the composite phase change material (OCPA-rGO) with a stable shape. The material has excellent leakproof performance (the leakage rate at 70 DEG C is only 4%), high thermal conductivity (0.366 W / (m.K)), remarkable photothermal conversion efficiency (91.6%) and electrothermal response characteristic, has a temperature sensitive resistance function, and can be applied to building energy-saving temperature control and intelligent household high-temperature early warning systems. According to the invention, high-value utilization of agricultural wastes is realized, and a new thought is provided for design of efficient and multifunctional phase change energy storage materials.

The invention discloses a bionic shaddock peel vibration reduction and energy absorption structure and a preparation method thereof, and relates to the technical field of aircrafts, a gradient chiral shaddock structure GCCS comprises a contact layer, a transition layer and a supporting layer, each layer comprises three bionic chiral shaddock structures, the three structures comprise a bionic chiral grapefruit structure-L type, a bionic chiral grapefruit structure-Q type and a bionic chiral grapefruit structure-D type. Three bionic shaddock peel dot matrix structures with porous characteristics and chiral spiral characteristics are created on the basis of a shaddock peel surface microstructure and chiral spiral characteristics existing at tendrils of natural climbing plants; the three bionic chiral grapefruit structures are combined into the gradient grapefruit chiral structure with negative honeycomb gradient change by reference to a macroscopic gradient strategy, and compared with a traditional lattice structure, the gradient grapefruit chiral structure is more excellent in mechanical bearing performance and vibration reduction performance.

The present invention provides a Shatian pomelo white skin layer debitterizing technology, and belongs to the field of pomelo peel processing technologies, and the technology comprises the following steps: peeling and dicing a Shatian pomelo to obtain a Shatian pomelo white skin layer, debitterizing the Shatian pomelo white skin layer, soaking and rinsing the debittered Shatian pomelo white skin layer, and then drying to obtain a finished product. The Shatian pomelo white skin layer is used as a research object, the debitterizing rate and the sensory score are used as index values, the influence of a single debitterizing method (blanching, saline water and enzymolysis) and a composite debitterizing method (blanching saline water compounding and blanching enzymolysis compounding) on the white skin layer debitterizing effect is explored, and the result shows that the blanching saline water compounding debitterizing effect (hot water for 2 minutes, 4% salt soaking for 4 hours and clear water soaking for 1 hour) is optimal; at the moment, the debitterizing rate is as high as 80.1%, the sensory score is 90, and the treatment time is shortened by 29% compared with that of a single debitterizing method.

The invention provides a compound feed additive capable of improving the flavor of eggs, a preparation technology and a compound feed, and relates to the technical field of feed preparation.Main components in shaddock peel are analyzed, the main components influencing the flavor of the eggs are screened out, and chemical components and shaddock peel powder are adopted to prepare the compound feed additive. The grapefruit flavor extract (active ingredients such as limonene, polyphenols and the like) prepared on the basis of the grapefruit peel powder. The preparation method comprises the following steps: compounding the raw materials in parts by weight: 20-40 parts of linalool, 5-10 parts of linalyl acetate, 2-4 parts of limonene, 1-2 parts of vanillyl alcohol, 0.7-1.4 parts of geranyl acetate, 5-10 parts of myrcene, 80 parts of pomelo peel powder, 150 parts of a carrier and 70 parts of a pomelo flavor extract; the total addition amount of the shaddock peel powder in the basal feed is reduced from 2% to 0.1%, a good flavor improvement effect can be maintained, and dependence on shaddock peel raw materials is greatly reduced.

The invention discloses anti-fatigue essential oil blended grapefruit sparkling wine and a preparation method thereof, and relates to the technical field of wine brewing, and the preparation method comprises the following steps: selecting intact grapefruits, separating peel from pulp, stirring the pulp into juice, and uniformly stirring for later use; shaddock peel essential oil is extracted from the fruit peels, and shaddock peel essential oil microcapsules are prepared by adopting a beta-cyclodextrin embedding technology; adding pectinase for enzymolysis; introducing SO2, fully mixing, uniformly stirring, adding cane sugar to adjust the sugar degree, keeping the temperature, and sterilizing; inoculating saccharomyces cerevisiae; fermenting to obtain a grapefruit wine crude product; centrifuging and filtering to obtain a grapefruit wine finished product; shaddock peel essential oil microcapsules are added, so that the essential oil concentration in the shaddock wine is 0.05%; the preparation method comprises the following steps: adding food-grade carbon dioxide, and controlling the pressure to obtain the grapefruit sparkling wine, so that the prepared grapefruit sparkling wine has a new flavor and an obvious anti-fatigue effect.

The invention provides a real-time nondestructive testing method for sugar and acidity of grapefruit based on near-infrared transmission, relates to the technical field of detection of internal quality of fruits, and solves the problem that the detection accuracy is influenced by fluctuation of grapefruit thickness when sugar and acidity detection is carried out on grapefruit fruits in a near-infrared transmission mode. According to the technical scheme, the method comprises the following steps: constructing sample sets corresponding to different fruit maximum transverse diameter subintervals; determining a preferable characteristic wavelength group; determining the maximum transverse diameter reference size of the fruit; determining an absorbance correction coefficient optimization value for sugar degree optimization prediction or acidity optimization prediction; and giving the sugar degree and acidity of the grapefruit commercial fruit through the grapefruit fruit sugar degree or acidity optimization prediction model. The method has the beneficial effects that different fruit maximum transverse diameter subintervals are used for dividing the thickness of the shaddock peel, and the transmitted spectrum is corrected by combining the absorbance correction coefficient optimization value on the basis of the fruit maximum transverse diameter reference size, so that the sugar and acidity detection precision during the separation of the thick-peel shaddock is improved.

The invention discloses a preparation method of a grapefruit peel-based electrostatic self-assembly carbon aerogel phase change material composite system, and overcomes the defects of low thermal conductivity, long-period instability and the like of a grapefruit peel-based composite phase change material. The invention provides the preparation method of the electrostatic self-assembled shaddock peel aerogel skeleton composite phase change material with enhanced heat conduction, high enthalpy value and long-period stability. Compared with the prior art, the shaddock peel-based aerogel composite phase change material prepared by the invention has high heat-conducting property, the heat conductivity of 1.18 Wm <-1 > k <-1 > is realized, and compared with a pure phase change material with the heat conductivity of 0.25 Wm <-1 > k <-1 >, the heat conductivity coefficient of the composite phase change material is increased by 3.48 times; the leakage loss rate of the phase change material is low, the performance is stable after 100 cycles, and the leakage rate is only 0.52%; the proportion of the carbon aerogel is low, and the proportion of the carbon aerogel in the composite phase change material system is 10-20% according to the reduction of the proportion of the carbon nanotubes.

The invention discloses a shape-stabilized phase change thermal management material, a preparation method thereof and application of the shape-stabilized phase change thermal management material as a thermal management material in a high-power electronic component, and belongs to the field of functional composites.The shape-stabilized phase change thermal management material is prepared by the steps that firstly, fresh pomelo peel is subjected to alkalization and hydrothermal pretreatment, and then ZIF-67 grows on the pretreated pomelo peel in situ; then, the obtained Pre-PP ZIF-67 is subjected to high-temperature calcination to prepare a high-graphitization heterogeneous carbon material, and finally, a phase change material is packaged in a pore channel of the high-graphitization heterogeneous carbon material by adopting a physical infiltration method to prepare the high-performance shaped phase change thermal management material. The prepared phase change heat management material has the advantages of excellent heat conductivity and heat storage performance, good adaptability and operability, lasting stability and reliability, wide application range, reusability and the like, and a new thought is provided for research and development of the high-performance phase change heat management material.

The invention belongs to the technical field of feed processing, and provides a periplaneta americana nymph feed and a preparation method thereof. The feed for the periplaneta americana nymphs comprises the following raw materials: basic grains, composite acid-base materials and composite Chinese herbal medicines. The preparation method comprises the following steps: (1) cleaning hippophae rhamnoides leaves, lemon leaves, shaddock peel and tartary buckwheat, drying, and crushing to obtain hippophae rhamnoides leaf powder, lemon leaf powder, shaddock peel powder and tartary buckwheat powder; (2) mixing and crushing the solid raw materials, adding phosphoric acid and sodium bicarbonate, and uniformly mixing to obtain a premix; and (3) adding hot water into the premix, uniformly stirring, cooling, steaming in a steamer, covering with a thermal insulation material, and stacking at normal temperature. According to the feed for the nymphs, the formula of the feed is improved, so that the absorption and digestion of the feed nutrient substances by the nymphs of the cockroaches can be remarkably improved, and the adult cockroaches which are shorter in nymph period, better in growth and development and higher in nutritional value can be obtained. The preparation method is easy to operate, beneficial to improving the fertilizer efficiency and suitable for large-scale production.

The invention relates to the technical field of food packaging materials, in particular to a preparation method and application of an antibacterial polylactic acid film. The preparation method of the antibacterial polylactic acid film comprises the following steps: step 1, putting montmorillonite into a methanol solution, ultrasonically dispersing uniformly, then adding a silane coupling agent, adjusting the pH value of a system to be acidic, performing first-stage heating, and then performing second-stage heating, centrifugal washing and vacuum drying to obtain modified montmorillonite; step 2, mixing the modified montmorillonite with shaddock peel essential oil for adsorption to obtain an antibacterial material; 3, the polylactic acid particles, N-methyl pyrrolidone and an antibacterial material are put into a double-screw extruder to be extruded and granulated, then the granules are put into a single-screw blow molding machine to be subjected to blow molding, and the antibacterial polylactic acid film is obtained. The problems that in the prior art, essential oil is fast in volatilization and uneven in dispersion, and the performance of the film is degraded due to addition of the essential oil are effectively solved.

The invention discloses a method for producing an antibacterial preservative film by using waste polylactic acid and waste pomelo peel as raw materials. The method comprises the following steps: 1) extracting grapefruit essential oil from waste grapefruit peel; 2) degrading the waste polylactic acid to obtain a polylactic acid degradation liquid; and 3) mixing the chitosan solution with the polylactic acid degradation liquid, grapefruit essential oil and glycerol, and carrying out film casting and drying to obtain the preservative film. The waste pomelo peel and the waste polylactic acid are combined, so that resource recycling of agricultural waste and industrial plastic waste is realized, and environmental pollution and white pollution are effectively reduced; meanwhile, by introducing the chitosan and the grapefruit essential oil, the preservative film is endowed with excellent biocompatibility and remarkable antibacterial performance, by introducing the grapefruit essential oil, the antibacterial performance of the film material is enhanced, the preservation period of food is prolonged, meanwhile, the safety and functionality of the packaging material are improved, and the environment benefits and application prospects are remarkable.

This invention discloses a modified grapefruit peel-based carbon aerogel, its preparation method, and its applications, belonging to the field of adsorbent preparation technology. The preparation method involves placing the grapefruit peel-based carbon aerogel in a potassium hydroxide solution and stirring at 75–85°C for 2.5–3.5 hours. After stirring, the mixture is filtered and dried, then calcined at 850–950°C for 1–1.5 hours in a nitrogen atmosphere. This invention solves the problems of low adsorption capacity and poor selectivity in current adsorbent materials. The modified grapefruit peel-based carbon aerogel electrode exhibits preferential selectivity for nitrates and phosphates. The invention utilizes capacitive deionization technology, resulting in low energy consumption and cost savings. The electroadsorption system electrode uses grapefruit peel as a raw material, which is widely available, convenient, and inexpensive. The resulting biomass-based carbon aerogel has the advantages of being renewable, biodegradable, and rich in carbon sources. It also enables the recycling of waste grapefruit peels, making it an environmentally friendly renewable material.

The invention provides a method for extracting general flavone from shaddock peel, and relates to the technical field of flavone extraction. The method for extracting the general flavone from the shaddock peel comprises the following steps: S1, cleaning the shaddock peel, chopping, drying, crushing, and sieving with a 40-mesh sieve to obtain shaddock peel powder; s2, mixing the shaddock peel powder with petroleum ether, degreasing, filtering, and washing with distilled water until no petroleum ether is left; s3, mixing the degreased shaddock peel powder with a choline chloride-citric acid solution, extracting for a certain time, centrifuging, and concentrating and drying an extracting solution to obtain shaddock peel flavone; in the choline chloride-citric acid solution, the molar ratio of choline chloride to citric acid is 1: (0.75-1.5); the water content in the choline chloride-citric acid solution is 20%-50%. The method provided by the invention is simple in steps, easy to operate and low in energy consumption, does not need additional equipment investment, remarkably reduces the extraction cost of the total flavonoids in the shaddock peel, and is suitable for large-scale production.

The invention discloses a pomelo peel-derived porous carbon material and a preparation method and application thereof, and relates to the field of water treatment.The pomelo peel-derived porous carbon material is prepared by using waste pomelo peel as a carbon source, performing pre-carbonization treatment, then using potassium chloride as a reinforcing agent and potassium hydroxide as an activating agent, and forming pomelo peel-derived porous carbon with a porous structure through a one-step activation method; the rich pore diameter can increase active sites capable of accommodating sodium ions, so that the desalination amount is increased. The comprehensive desalination amount can reach 24.6 mg / g under the applied voltage of 1.2 V. The material is simple in preparation process, raw materials are easy to obtain, and a new thought is provided for constructing biomass-derived porous carbon when heteroatom doping is not carried out.

The invention belongs to the technical field of natural perfume extraction and essence preparation, and particularly relates to an essence preparation method by coupling low-temperature enzyme fermentation with supercritical CO2 extraction. According to the method, rose petals, perilla leaves and shaddock peels are used as raw materials, aroma precursor substances are released through synergistic low-temperature enzymolysis of multiple enzymes such as pectinase and cellulase, then non-saccharomyces cerevisiae and esterifying bacteria are introduced for step-by-step anaerobic fermentation, multi-layer composite aroma components are generated, then freeze drying and three-stage gradient supercritical CO2 extraction are performed, and the multi-layer composite aroma components are obtained. Aroma components with different polarities are enriched in a grading manner; and finally, mixing and stabilizing treatment are performed to obtain an essence finished product. The method constructs a complete process flow from precursor release to structure construction to component extraction, and is suitable for the fields of tobacco flavors, food flavors and the like.

The invention discloses a lactobacillus inoculant preparation method, which comprises: adding a freeze-drying protective agent to a lactobacillus fermentation broth, and stirring to obtain a uniformly mixed slurry, the freeze-drying protective agent comprising 8-10 parts by weight of pomelo peel powder and 0-2 parts by weight of skimmed milk powder; and freeze-drying the uniformly mixed slurry to obtain the lactobacillus inoculant. The freeze-drying protective agent disclosed by the invention is strong in water absorption, and can omit a centrifugal process when being applied to a process of preparing a lactobacillus fungicide, so that the inactivation of lactobacillus cells caused by centrifugal operation is reduced, and the freeze-drying survival rate reaches 85% or above.

The invention discloses a preparation method and application of a nano calcium peroxide modified high-adsorbability biomass charcoal phosphorus removal agent. Compared with a plurality of biomass raw materials, shaddock peel is preferably selected as a precursor; then, preparing shaddock peel biomass charcoal from the optimized shaddock peel; and finally, carrying out reaction on calcium chloride, ammonia water and hydrogen peroxide to generate nano calcium peroxide in situ, introducing polyethylene glycol as a dispersing agent, compounding the nano calcium peroxide with the pomelo peel biomass charcoal, stirring, centrifuging, washing and drying to obtain a final product. Compared with similar materials prepared from other biomass raw materials (such as ginkgo leaves and corncobs), the biomass charcoal phosphorus removal agent prepared by taking shaddock peel as a precursor and combining the modification effect of nano calcium peroxide has the advantages that the adsorption capacity of phosphorus in a water body is remarkably improved, and the biomass charcoal phosphorus removal agent has higher adsorption rate and good pH applicability. The material can be used for deep purification of low-concentration phosphorus polluted water bodies such as town sewage and agricultural drainage, and has the application prospects of treating waste with waste and being efficient and energy-saving.

This utility model relates to the field of fuel cell technology, and in particular to a buffer device for a solid oxide fuel cell stack with overheat protection and combined heat and power functions. A biomimetic grapefruit peel structure protective shell is provided between the solid oxide fuel cell stack and several helical spring components. Several symmetrically arranged metal liquid cooling pipes are located on the biomimetic grapefruit peel structure protective shell along the fuel flow direction. A temperature sensor connected to the liquid cooling system is installed inside the biomimetic grapefruit peel structure protective shell to collect the internal temperature signal of the solid oxide fuel cell stack and control the start / stop and flow rate of the cooling water in the metal liquid cooling pipes. The outermost layer of the biomimetic grapefruit peel structure protective shell is resistant to mechanical vibration and has good thermal insulation, providing a good buffering effect while reducing heat loss from the stack. Smaller pores are provided in the middle layer, and larger pores are provided in the inner layer, improving the system's buffering efficiency through the porous structure. The metal liquid cooling pipes are located within the middle layer of the protective shell, achieving efficient heat conduction.

This invention relates to the field of food processing equipment, and more particularly to a high-temperature debittering equipment for grapefruit peel food processing. The equipment includes a main body with covers fixedly connected to both the left and right sides of the top surface, and water storage tanks fixedly connected to both the front and rear sides of the top surface. A soaking tank is fixedly connected between the left and right covers and the front and rear water storage tanks. An intermittent water injection component is installed inside the left cover, and a waste liquid extraction component is installed inside the right cover. The soaking tank contains a squeezing dehydration component and a bubbling aeration component. The intermittent water injection component is connected to both the water storage tank and the soaking tank. This equipment achieves automated cyclic control of the high-temperature debittering process of grapefruit peel through the coordinated operation of its components. A first hydraulic cylinder drives a squeezing baffle to periodically squeeze the grapefruit peel, forcibly expelling the high-concentration bitter liquid remaining in its internal pores, effectively avoiding the problem of incomplete debittering caused by saturated backflow of bitter substances, and significantly improving the debittering efficiency and uniformity.

The invention relates to the technical field of sewage treatment, and provides a magnetic biochar catalyst and a preparation method and application thereof in degradation of antibiotic wastewater, and the magnetic biochar catalyst is prepared from the following raw materials in parts by weight: 4-6 parts of bagasse, 4-6 parts of pomelo peel, 4-6 parts of orange peel, 5-7 parts of soluble ferric salt, 5-7 parts of soluble manganese salt, 13-17 parts of chitosan, 4-6 parts of bacillus cereus powder and 4-6 parts of alcaligenes powder. According to the application, biochar formed by pyrolysis of agricultural wastes such as bagasse and chitosan cooperate with adsorption, tetracycline in wastewater is rapidly enriched, the local concentration is increased, and the toxicity of tetracycline to microorganisms is reduced; the strain can reduce the toxicity of pollutants and improve the utilization efficiency of a chemical oxidant; the soluble metal salt activates ozone and persulfate to deeply oxidize tetracycline. It can be seen that the magnetic biochar catalyst achieves efficient removal of antibiotic pollutants through the synergistic effect of physical adsorption, biodegradation and chemical oxidation.

The application discloses a preparation method of an adsorbing material for sulfuric acid decolorization, the material and application, and relates to the following steps: firstly, putting a pomelo peel into a pulverizer to obtain pomelo peel powder, and then mixing the pomelo peel powder with a sodium hydroxide solution to obtain pomelo peel cellulose; then, mixing the pomelo peel cellulose with bentonite at a mass ratio of 1:0.8-1.2, adding a crosslinking agent, stirring, and then performing ultrasonic dispersion in an ultrasonic cleaner to obtain a gelatinous substance; finally, cutting the gelatinous substance into particles, and drying the particles to obtain a pomelo peel bentonite-based adsorbing material. The adsorbing material obtained by the method has good adsorbing performance, high sulfuric acid decolorization capacity, and large particle size, and is easy to recover.

The invention discloses osmanthus fragrans aromatherapy with soothing, nerve soothing and sleep aiding effects and a preparation method of the osmanthus fragrans aromatherapy, and relates to the technical field of preparation of aromatherapy daily necessities. The osmanthus fragrans fragrance is prepared from the following components in parts by weight: 20 to 30 parts of osmanthus fragrans flower extract, 15 to 25 parts of angelica sinensis extract, 4 to 7 parts of hovenia dulcis thunb fruit extract, 3 to 12 parts of plant essential oil, 0.5 to 1 part of linalyl acetate, 1 to 3 parts of tween-80 and 500 to 800 parts of water, wherein the plant essential oil is prepared by mixing and extracting grapefruit peel, lily, jasmine flower, chamomile, lemon grass and lavender. The osmanthus fragrans fragrance prepared by the invention has good effects of improving insomnia and improving sleep quality, is lasting in fragrance, can inhibit part of microorganisms from breeding in air, and has multiple effects.

The utility model belongs to the technical field of sauce raw material processing, and particularly relates to double-shaddock peel dry sauce raw material processing equipment for sour and hot fished vermicelli. Comprising a base, a first conveying belt is installed on the base, a peeling assembly and a shredding assembly are installed on the base, the peeling assembly comprises a peeling knife and a pressing assembly, the pressing assembly comprises a guiding shaft and an air cylinder which are installed on the base, the air cylinder is provided with a pressing plate, the pressing plate is provided with a linear bearing, and the guiding shaft is sleeved with the linear bearing; the peeling knife is installed on the base, the shredding assembly comprises a guide plate, a driving assembly, a second conveying belt and a thread rolling knife, the guide plate is fixedly installed on the base, the second conveying belt is installed on the base, and the driving assembly is fixedly installed on the base and used for driving the first conveying belt and the second conveying belt; the thread rolling cutter is installed on the base and located between the cutter and the second conveying belt, and a collecting groove is further formed in the base. The utility model aims to solve the problem that time and labor are wasted in a manual scraping mode when middle peels of grapefruit peels are removed.

The present invention belongs to the technical field of grapefruit tea production, and discloses a grapefruit tea production outer skin bitter removing bleaching boiling device, which comprises a main body and a filter screen, and further comprises: a cutting mechanism arranged at the top end of the filter screen, and the cutting mechanism comprises a material storage box fixedly connected to the top end of the filter screen; the swing mechanism is arranged at the bottom end of the storage box; according to the pomelo peel blanching device, cut pomelo peel can be uniformly dispersed in a filter screen to be blanched through swinging of a swinging plate, finally, the swinging plate is driven by a driving assembly to swing, and along with continuous swinging of the swinging plate, the cut pomelo peel is blanched and boiled under the dual action of swinging force and self gravity. According to the pomelo peel blanching device, the pomelo peel is uniformly spread in the blanching device in an orderly and dispersed state, so that each pomelo peel can be fully contacted with the blanching liquid with accurately controlled temperature and concentration in the device, the difference of blanching degree caused by accumulation or local concentration is avoided, and the uniformity of the pomelo peel blanching process is improved.

The utility model discloses a grapefruit quick peeling auxiliary device, relates to the technical field of peeling devices, and aims to solve the technical problem that the peeling quality is affected due to inconvenience in transverse opening of the grapefruit at present, the grapefruit quick peeling auxiliary device comprises a shovel piece, an assembling mechanism and a connecting cylinder, the upper end of the outer side of the shovel piece is fixedly provided with a separation knife, and the separation knife is designed in a sawtooth shape; the upper end of the shovel piece is installed on the connecting cylinder in an inserted mode, a handle rod is arranged at the upper end of the connecting cylinder, a connecting rod is arranged at the lower end of the handle rod, the connecting rod is installed on the connecting cylinder in a threaded mode, the assembling mechanism is installed at the lower end of the shovel piece, and a feeding opening is formed in the upper side of an assembling cylinder of the assembling mechanism. The grapefruit peeling machine has the advantages that a transverse grapefruit notch is smooth, a scraper knife can cut in conveniently, and the peel and flesh separation quality is ensured.

The application belongs to the field of food packaging, and particularly relates to a functional composite film based on full-component utilization of pomelo peel and application thereof. The pomelo peel is separated into water-soluble active components (supernatant) and water-insoluble components (precipitate), and polyvinyl alcohol / supernatant films and polyvinyl alcohol / precipitate films are prepared by compounding the water-soluble active components and the water-insoluble components with polyvinyl alcohol, respectively. The polyvinyl alcohol / supernatant film has excellent antioxidant activity and flexibility, and the polyvinyl alcohol / precipitate film has excellent antibacterial property and mechanical strength. The two kinds of films can be used alone or in combination according to the preservation requirements of different foods, so as to achieve targeted preservation effect. The application realizes high-value utilization of the full components of pomelo peel, and the prepared composite film is biodegradable, and has wide application prospect in the field of food packaging.

The application discloses a preparation method of a static self-assembly carbon aerogel phase change material composite system based on pomelo peel, and overcomes the shortcomings of low thermal conductivity and long-period instability of the pomelo peel-based composite phase change material, so as to provide a preparation method of a static self-assembly pomelo peel aerogel skeleton composite phase change material with high thermal conductivity, high enthalpy and long-period stability. Compared with the prior art, the pomelo peel-based aerogel composite phase change material prepared by the application has high thermal conductivity, realizes the thermal conductivity of 1.18Wm ‑1 k ‑1 , the thermal conductivity of the composite phase change material is 3.48 times higher than that of the pure phase change material with the thermal conductivity of 0.25Wm ‑1 k ‑1 , the leakage loss rate of the phase change material is low, the performance is stable after 100 cycles, and the leakage rate is only 0.52%; the proportion of the carbon aerogel is low, and according to the reduction of the proportion of the carbon nanotube, the proportion of the carbon aerogel in the composite phase change material system is 10-20%.

This invention relates to the preparation and application of carbon dot-functionalized lanthanide metal-organic framework materials for the detection of permanganate ions in water: S1, selecting raw materials: europium nitrate, trimesic acid, and grapefruit peel; S2, dissolving trimesic acid in anhydrous ethanol and stirring; S3, adding europium nitrate solution to the solution obtained in S2 and stirring; S4, allowing to stand, centrifuging to collect the white precipitate, washing and drying to obtain a white lanthanide metal-organic framework material; S5, drying and crushing grapefruit peel, adding deionized water, and transferring to a high-pressure reactor for reaction; S6, centrifuging the solution obtained in S5, taking the supernatant and filtering it through a microporous membrane; S7, dialysis purification of the solution obtained in S6 to obtain a pale yellow carbon dot solution; S8, mixing the carbon dot solution obtained in S7 with the lanthanide metal-organic framework material in S4 to obtain a carbon dot-functionalized lanthanide metal-organic framework material; S9, using the material obtained in S8 for the detection of permanganate ions in water.

The present invention provides a fermentation method Yuring pomelo healthy preserved fruit and a preparation method thereof, and relates to the technical field of food processing, and the preparation method comprises the following six steps: pretreatment of raw materials, fermentation treatment, preparation of a mixed impregnation liquid, vacuum impregnation, drying and packaging. The preparation method comprises the following steps: cutting white flesh of the jade ring pomelo into strips, inoculating and fermenting to remove bitterness, enhance aroma and improve texture, then putting a fermented blank into a sugar-acid mixed impregnation liquid, performing vacuum impregnation to promote flavor permeation, and finally drying and packaging to obtain a finished product. The method effectively solves the problems of serious nutrition loss, difficult texture control, poor flavor, high energy consumption and the like caused by long-time water boiling or boiling in traditional shaddock peel processing, promotes deep penetration of sugar liquid and flavor substances while reducing bitterness, keeps more nutritional ingredients, and improves the taste of the shaddock peel. And the formed product has unique quality of being glittering, translucent, soft and glutinous, clear in color and palatable in sourness and sweetness, and the process is efficient, green and suitable for large-scale production.

1. Name of the design product: Storage jar (cylindrical with a large round opening, made of polished pomelo peel). 2. Use of the design product: For storing dry goods and for ornamental purposes. 3. Design feature of the design product: Lies in the shape. 4. Picture or photograph that best shows the design feature: Front view.