24 results about "Cellulose formation" patented technology

The invention discloses a degradable hypha mulching film and a preparation method thereof, and belongs to the field of agricultural mulching materials, and the degradable hypha mulching film is composed of hypha layers and a hypha cross-linking layer clamped between the hypha layers. The mushroom hypha mulching film is prepared by utilizing the characteristics of adhesion, water resistance and heat preservation of mushroom hyphae, and the method specifically comprises the following steps: culturing mushroom liquid strains, spraying the mushroom liquid strains onto plant fiber paper by taking the plant fiber paper as a bottom film, and degrading lignin and cellulose of the fiber paper by the hyphae to form a hypha cross-linked film, so as to prepare the mushroom hypha mulching film. The film has the basic characteristics of a mulching film, the prepared hypha mulching film has the characteristic of being naturally degraded after the crop growth cycle ends, and no residual matter is left in the soil environment in the degradation process. After the mulching film is degraded, the soil fertility can be effectively improved, the physicochemical properties and biological characteristics of soil can be improved, the problem of environmental pollution caused by the use of a traditional mulching film is further reduced, and powerful support is provided for sustainable development of agricultural production.

The present invention relates to the technical field of flame retardant materials, and specifically discloses a carbon quantum dot, a flame retardant biomass composite film, a preparation method and an application. The present invention uses urea and its derivatives as hydrogen bond donors, aminoglycerol-type substances as hydrogen bond acceptors, and then coordinates and combines with aluminate to obtain a precursor with good chemical stability; the precursor is used as a raw material to prepare carbon quantum dots through solvent thermal reaction. The flame retardant film formed by the carbon quantum dots, lignin and cellulose is used to modify the polymer substrate, which effectively solves the problems of poor compatibility and bonding between lignin, cellulose and the polymer substrate, and the synergistic effect between the carbon quantum dots and lignin and cellulose significantly improves the flame retardant effect of the biomass composite film. At the same time, it also effectively suppresses the smoke production when the polymer substrate burns, which is conducive to expanding the application field of polymer materials and has broad application prospects in the flame retardant field.

The present invention relates to a nanocomposite material, a fireproof pre-reaction liquid, and a preparation method and application thereof, wherein the nanocomposite material comprises organic nanoparticles and organic / inorganic hybrid nanoparticles, and the organic nanoparticles and the organic / inorganic hybrid nanoparticles both comprise a flexible core layer, a shell layer and a reinforcing transition layer, and the reinforcing transition layer is arranged between the flexible core layer and the shell layer. The pre-reaction solution of the present invention has the characteristics of low viscosity and can form an interpenetrating network structure with cellulose, can be coated on the surface of a transparent cellulose-modified soda-lime glass product to form a fireproof layer, and at the same time, the low-temperature use temperature can reach ‑25°C±1°C, and the coating has a UV irradiation resistance time of more than 2000 hours.

The invention relates to a method for preparing a spherical solidified tannin germanium precipitation agent by utilizing agriculture and forestry solid wastes, and belongs to the technical field of functional materials. The agricultural and forestry solid waste is sequentially subjected to pretreatment, hemicellulose removal and lignin removal to prepare high-purity cellulose, epoxy chloropropane is utilized for bridging cellulose and hexaalkyl diamine, and a section of flexible chain is introduced into the cellulose; the preparation method comprises the following steps: adding a hydrophobic organic solvent paraffin and TA-alkylamino cellulose to form a water-in-oil (W / O) system, promoting the immobilized tannin to form easily filtered spheres, adding span80 to avoid system emulsification, and adding epoxy chloropropane, bridging TA and alkylamino cellulose to prepare the spherical immobilized tannin germanium precipitation agent. The cellulose purity can reach 95% or above, and high-quality utilization of solid waste is achieved; in the spherical solidified tannin germanium precipitation agent, the steric hindrance of tannin molecular activity is small, the activity is high, the germanium precipitation rate of solidified tannin after 10 times of circulation can still reach 96.50%, and the tannin consumption required by precipitation of kilogram of germanium is reduced to 0.105 kg / kg and is reduced by 99.65% compared with the tannin consumption of existing industrial germanium precipitation.

The invention relates to the technical field of general papermaking, in particular to tipping paper for laser transfer cigarettes and a processing method thereof.The tipping paper for the laser transfer cigarettes is used for tobacco products and comprises a first body paper layer, a pattern layer, at least one reinforcing layer and at least one second body paper layer; the first body paper layer and the pattern layer are outer layers of the tipping paper, the first body paper layer is in direct contact with a cigarette holder of the tobacco product, and the first body paper layer or the second body paper layer contains cellulose; the reinforcing layer is arranged between the first raw paper layer and the second raw paper layers and / or between the two second raw paper layers, the reinforcing layer is of a net structure, and a substance forming a hydrogen bond with cellulose is arranged in the reinforcing layer; the pattern layer is arranged on one side of the second body paper layer, and the pattern layer comprises laser patterns.

The invention discloses a method for preparing a bacterial cellulose-cyclodextrin compound based on a pH-shift hydrogen bond switch. Bacterial cellulose is pretreated through an alkali-urea system to form an alkali swelling state, and hydrochloric acid is used for regulating the pH value of the system to trigger a hydrogen bond switch: under the alkaline condition, cellulose hydroxyl and alkali urea form a hydrogen bond to realize dissolution, and under the acidic condition, the hydrogen bond breaks to promote polymerization and sedimentation of cellulose; meanwhile, new hydrogen bond grafting wrapping is formed between cyclodextrin and cellulose through pH gradient change induction. The prepared compound cyclodextrin has the good biocompatibility and mechanical strength of the bacterial cellulose and the inclusion characteristic of cyclodextrin, has wide application prospects in the fields of biomedicine, food, materials and the like, is stable in structure and provides a new path for preparation of cellulose-based functional materials.

A method for increasing lignocellulosic carbon microporous and mesoporous based on solvent permeation, characterized by comprising the following steps: cutting wood into thin slices of a predetermined size, and performing thermal modification; soaking the wood slices pre-carbonized in step 1) in a polar solvent for 6-10 hours, and ultrasonic oscillation; the polar solvent includes acetone, ethanol, petroleum ether, ethyl acetate, methanol and water; soaking the slices treated in step 2) in a polar solvent for 8-20 hours; drying; calcining the dried wood slices in a protective atmosphere to form lignocellulosic carbon. In the present application, the cellulose / hemicellulose in the cell wall is initially pyrolyzed by thermal modification to form a cutin layer, and then the porosity of the thermal modified wood cell wall is improved by the similar phase solubility and permeation of the polar small molecule solvent, and finally the microporous / mesoporous volume of the wood-derived carbon cell wall is simply and efficiently improved.

This invention relates to the field of pharmaceutical technology, specifically to a sustained-release tablet of dihydroergot mesylate with composite network regulation and its preparation method. The sustained-release tablet comprises a composite structure consisting of a drug-resin composite core, an inner interface regulation structure, and an outer composite network. The key to its preparation lies in: forming a wet complex of dihydroergot mesylate with a strongly acidic cation exchange resin; sequentially introducing low-viscosity hydroxypropyl methylcellulose and a first portion of ethyl cellulose to construct the inner interface regulation layer; and after semi-drying, adding high-viscosity hydroxypropyl methylcellulose and a second portion of ethyl cellulose to form the outer composite network framework. This structure can significantly inhibit the burst release of the drug in gastric juice and achieve a stable and sustained release in intestinal juice, with stable tablet quality and good industrialization prospects.

The invention relates to a method for preparing cured tannic acid through a radiation initiation method, and belongs to the technical field of functional materials. The preparation method comprises the following steps: preparing spherical cellulose by utilizing a soft template method, forming a water-in-oil (W / O) system by hydrophobic organic solvent paraffin and cellulose, adding span80 to avoid layering and agglomeration of water-phase liquid drops in an oil phase so as to form the spherical cellulose, and adding ultrasonic energy to promote the cellulose to form a porous spheroid; cellulose is radiated to obtain cellulose containing a carbon center free radical, when the free radical is in contact with GMA (glycidyl methacrylate), the carbon center free radical is in contact with C on the GMA to generate bridging reaction, the GMA can be connected to the cellulose only through one step, and the GMA has double effects of bridging and epoxy activation, so that the GMA can be used for preparing a high-temperature-resistant epoxy resin material for the high-temperature-resistant epoxy resin material for the high-temperature-resistant epoxy resin material for the high-temperature-resistant epoxy resin material. And the tannic acid can be connected without other reagents to prepare the cured tannic acid. The method is simple, the grafting rate is high, the tannic acid content in the formed cured tannic acid can reach 20 wt.%, and the adsorption equilibrium amount of the cured tannic acid to germanium can still reach 9.97 mg / g after the cured tannic acid is circulated for 10 times.

The invention relates to the technical field of textile fabrics, and discloses a multifunctional composite jacquard fabric and a preparation method thereof.The jacquard fabric is formed by weaving modified polyester fibers serving as warp and weft, and the modified polyester fibers are prepared by taking PET slices as a base material and taking polyester fibers as a base material; the invention relates to a cellulose antibacterial material which is prepared by adding an antibacterial modification component, a mechanical enhancement component, a dispersant, a surfactant, a lubricant and an antioxidant, the antibacterial modification component is prepared by introducing a chloromethyl group into a cellulose skeleton to form an intermediate, and then carrying out quaternization reaction on the intermediate and N, N-dimethylalkylamine. The mechanical enhancement component is prepared by introducing an epoxy functional group on a polyether-ether-ketone rigid chain, after high-temperature melt blending, the mechanical enhancement component, PET and cellulose form a stable cross-linked structure, the jacquard fabric is endowed with excellent mechanical properties such as high temperature resistance and wear resistance, and meanwhile, the fabric can be endowed with a long-acting antibacterial effect due to the addition of the antibacterial modification component.

To identify filter elements that exhibit sufficient filter hardness despite reduced filtering performance and increased cooling, especially for so-called slim or ultra-slim cigarettes. [Solution] A filter element for a mouthpiece for use in a smoking product or HNB product, the filter element having a filter body made of a tow material, the tow material being formed by a plurality of monofilaments of crosslinked and crimped cellulose acetate filaments, the cellulose acetate filaments exhibiting a cross-sectional shape, in particular a multilobal or polygonal, preferably Y-shaped, shape, in which: - the cellulose acetate filaments of the tow material exhibit a uniform filament titer, in particular a predefined or predefinable value, in the range of 10 denier (11.1 dtex) or less and 5 denier (5.5 dtex) or more; - the tow material has a total titer in the range of 10,000 denier (11.1 kdtex) or less and t5,000 denier (5555.5 dtex) or more; and - the specific fiber weight of the cellulose acetate filaments of the tow material is 2.5 mg or less per mm of filter element length and 1.0 mg or more per mm of filter element length.

The invention discloses a preparation method of a nanofiller for improving wet skid resistance of a tire. According to the preparation method, the nano silicon dioxide is endowed with a gradient polar surface through plasma treatment, so that the nano silicon dioxide has double characteristics of dynamically regulating and controlling adsorption and discharge of a water film, and a bionic micro-nano structure formed by silicon dioxide particles growing on the surface of graphene in situ is combined, so that the mechanical occlusion effect of the tread and the water film is effectively enhanced. The carbon nanotubes directionally arranged in the magnetic field construct a three-dimensional conductive path in a rubber matrix, so that the hidden danger of static accumulation is eliminated, and the longitudinal rigidity is improved through an orientation enhancement effect. According to an ultrasonic-assisted dispersion process, nano aluminum oxide and hydrophobic cellulose form a space interlocking network, the dispersion uniformity of the filler is improved to a nano-scale level in cooperation with an interface bridging effect of a silane coupling agent, meanwhile, performance breakthrough of a wet friction coefficient and tensile strength is realized, and the overall mechanical performance is further improved.

The invention is applicable to the technical field of art coatings, and provides a degradable environment-friendly art coating material and a preparation method thereof, the degradable environment-friendly art coating material comprises the following raw materials: modified bacterial cellulose gel, rosin-based waterborne epoxy ester, a porous TiO2 and plant carbon composite pigment, a vegetable tannin-iron ion chelate, cassava starch, a limonene / ethanol mixed solvent and sodium copper chlorophyllin, according to the degradable environment-friendly art coating material provided by the invention, after bacterial cellulose is esterified, a carboxyl group activates a microbial extracellular enzyme, double-bond light degradation with rosin is carried out to form a double-channel degradation path, and a tannin-Fe < 3 + > chelate solidifies free heavy metal ions; the tannic acid-Fe < 3 + > protective film prevents the pigment from being in direct contact with TiO2, and photocatalytic oxidation decomposition is reduced; rosin-based waterborne epoxy ester and cellulose form a microphase separation hydrophobic barrier, water molecule permeation is blocked, and the color rendering property and durability are improved; sodium copper chlorophyllin sensitizes and expands visible light absorption, and the degradation efficiency under natural illumination is improved.

The application discloses a kind of bifunctional carbon-based catalyst and its application, the bifunctional carbon-based catalyst of the particle size 1nm-7 μm boron-carbon-based microspheres, with furan boronic acid and methylglyoxal as raw material to prepare by hydrothermal co-carbonization reaction.It is with methylglyoxal and furan boronic acid mixture as composite functional carbon source, by one-step hydrothermal co-carbonization method synthesized with strong adsorption boron hydroxyl and in-situ carboxyl bifunctional carbon-based catalyst.Boron hydroxyl is adsorption site, by with cellulose form chemical bond force to improve the mass transfer efficiency of catalyst and cellulose;With in-situ carboxyl as catalytic site, break glycosidic bond, can realize cellulose to glucose efficient conversion in pure aqueous phase.In addition, the bifunctional carbon-based catalyst of the application has excellent hydrothermal stability and repeatability in catalyzing cellulose conversion, solvent system is water, more economical, green, safe.

The invention discloses a formula and a preparation method of a cellulose-based conductive humidity sensing material. The cellulose-based conductive humidity sensing material comprises the following components: cellulose, deionized water, an esterifying agent, a catalyst, chitosan, metal salt and a cross-linking agent, and N-hydroxysuccinimide and 1-ethyl-(3-dimethylaminopropyl) carbodiimide are used together; the invention also provides a preparation method of the material, which comprises the following steps: taking cellulose, adding deionized water and stirring, adding an esterifying agent and stirring, uniformly mixing and stirring with a catalyst, adjusting the pH value to be neutral, drying to obtain esterified modified cellulose, taking chitosan and a metal salt solution, mixing and stirring, adding the esterified modified cellulose into the mixture and stirring to obtain the material. A cross-linking agent is added, the pH value is adjusted to be weak acid, and a conductive humidity sensing material is obtained; chitosan and cellulose formed in the formula form a good cross-linking system, diversified influence effects are achieved, and the conductive humidity sensing film or paper with good humidity response and conductive effects can be prepared.

The invention provides a tacrolimus multi-layer coated pellet capsule and a preparation method of the tacrolimus multi-layer coated pellet capsule. The tacrolimus multi-layer coated pellet capsule is characterized by comprising an inner core pellet, a middle coating layer and an outer coating layer, the core pellet is prepared from tacrolimus, high molecular weight ethyl cellulose with the molecular weight of 100000 to 300000Da, a disintegrating agent and a filling agent; the middle coating layer comprises medium molecular weight ethyl cellulose with the molecular weight of 30000 to 50000 Da; the outer coating layer comprises low molecular weight ethyl cellulose with the molecular weight of 1000 to 10000 Da and a release accelerator. Through the innovative design of a three-layer coating structure, the multi-stage release characteristic of tacrolimus is realized. The core pellet adopts high-molecular-weight ethyl cellulose as a base material to provide a drug sustained release basis; the middle coating layer is made of medium-molecular-weight ethyl cellulose, so that a stable membrane-controlled release layer is formed, and the drug release rate is accurately controlled; and the outer coating layer adopts low-molecular-weight ethyl cellulose to be matched with a release accelerator, so that the quick release of the medicine is realized.

This invention provides a method for preparing a bifunctional mesoporous solid acid catalyst and its application in the hydrolysis of cellulose to produce glucose. Using alkali lignin as the carbon source and sucralose as the chlorine source, the bifunctional mesoporous solid acid catalyst is obtained after high-temperature carbonization and concentrated sulfuric acid sulfonation. This catalyst not only possesses a high density of -SO3H groups, enabling efficient cleavage of cellulose glycosidic bonds, but also exhibits -Cl groups that can form hydrogen bonds with cellulose, enhancing the catalyst's adsorption capacity for cellulose polysaccharides. When the prepared catalyst is used for cellulose hydrolysis, it can efficiently convert cellulose into glucose at a temperature of 150–190 °C for 2–6 h. It exhibits advantages such as high catalytic efficiency, few byproducts, and low corrosiveness to equipment, making it an environmentally friendly solid acid catalyst.

The present invention discloses a method for packaging cut meat for freshness preservation. The packaging method for cut meat for freshness preservation according to the present invention is a packaging method for cut meat for freshness preservation, comprising: (a) cold A step of forming a coating film having a thickness of 0.01 to 0.2 mm by applying a natural polymer compound, composed of one or more of agar, gelatin, cellulose, starch, and protein, to the surface of the cut meat; (b) the above It consists of a packaging step for packaging cut meat with a coating film formed thereon. The packaging method for cutting meat for freshness preservation according to the present invention, configured as described above, applies agar to the surface of the cut meat, Form a coating film by applying natural polymer compounds such as gelatin, alginic acid, starch, other polysaccharides, starch, and cellulose. It lowers the production of basic nitrogen by blocking the cell membranes on the surface of the meat from the outside through simple process improvements, and at the same time, microorganisms It has the advantage of being able to suppress spoilage caused by water proliferation. In addition, natural polymer compounds can maintain freshness and suppress browning by blocking the cell membranes on the surface of the meat. Since this can guarantee excellent appearance and taste for meat products that prioritize sensory elements, it enhances marketability. Useful effects are expected. In addition, since it can be distributed and displayed in a state highly preferred by consumers, consumer satisfaction with the product can be further enhanced. It has an effect.

The present invention relates to an organic / inorganic hybrid nanomaterial, a fireproof pre-reaction solution, and their preparation methods and applications. Among them, the organic / inorganic hybrid nanoparticles include first polyacrylamide-based organic / inorganic hybrid nanoparticles and second polyacrylamide-based organic / inorganic hybrid nanoparticles. Both the first polyacrylamide-based organic / inorganic hybrid nanoparticles and the second polyacrylamide-based organic / inorganic hybrid nanoparticles include a flexible core layer, a shell layer, and a reinforcing transition layer, and the reinforcing transition layer is disposed between the flexible core layer and the shell layer. The pre-reaction solution of the present invention has the characteristics of low viscosity and can form an interpenetrating network structure with cellulose, and can be coated on the surface of a transparent cellulose-modified soda-lime glass product to form a fireproof layer. At the same time, the low-temperature use temperature can reach -25°C ± 1°C, and the coating has a UV irradiation resistance time exceeding 2000 hours.

Provided herein are compositions and methods for engineering a bacterium comprising a reduced capacity for cellulose formation, a reduced capacity for foaming behavior, or an increased capacity for cell density for enhancing bioprocessing outcomes associated with the fermentative production of industrially relevant bioproducts.

A delustered modified cellulose fiber, comprising a delustering agent, the delustering agent containing modified titanium dioxide, and the modified titanium dioxide bearing a functional group which forms a bond with cellulose in the cellulose fiber. The manufacturing method for the delustered modified cellulose fiber comprises the following steps: adding cellulose and the delustering agent into a spinning dope and mixing same; the spinning dope being under a reaction condition, a surface modifier of the delustering agent activating the surface of titanium dioxide to make same bear a functional group so as to form modified titanium dioxide, and the functional group of the modified titanium dioxide forming a bond with the cellulose; and, on the basis of the bond between the modified titanium dioxide and the cellulose, performing spinning to produce the cellulose fiber. The present invention reduces the residual content of the delustering agent in the spinning dope, thereby improving the effect of spinning dope recovery.

Provided herein are compositions and methods for engineering a bacterium comprising a reduced capacity for cellulose formation, a reduced formation, a reduced capacity for foaming behavior, or an increased capacity for cell density for enhancing bioprocessing outcomes associated with the fermentative production of industrially relevant bioproducts.

The invention relates to a long-acting antibacterial and anti-algae waterproof coating for a drinking water pool, the long-acting antibacterial and anti-algae waterproof coating for the drinking water pool comprises a liquid material and a powder material, the liquid material comprises an organic silicon emulsion, modified organic silicon, color paste, an anti-algae agent, an antibacterial agent, an auxiliary agent and water, and the powder material comprises an organic silicon emulsion, modified organic silicon, color paste, an anti-algae agent, an anti-bacterial agent, an auxiliary agent and water. The powder comprises white cement, quartz sand, PP fibers, cellulose and a water reducing agent. On the basis of compounding modified organic silicon obtained by reacting a reaction product of vinyl hydrogen-containing silicone oil and allyl glycidyl ether modified chitosan with N, N-methylene bisacrylamide, styrene and butyl acrylate with an organic silicon emulsion, an antibacterial agent, an anti-algae agent and an auxiliary agent are matched, so that antibacterial and anti-algae functions and system stability are realized; the powder is cooperated with the quartz sand through the white cement, a ventilation channel is constructed by means of the quartz sand, the waterproof performance is guaranteed through the cement, a three-dimensional toughening network is formed through the PP fibers and the cellulose, and the constructability and the coating compactness are optimized in cooperation with the water reducing agent.

The invention relates to a delustering modified cellulose fiber, which comprises a delustering agent, the delustering agent comprises modified titanium dioxide, the modified titanium dioxide is modified with a functional group, and the functional group and cellulose in the cellulose fiber form bonding, and a manufacturing method of the delustering modified cellulose fiber comprises the following steps of: preparing the delustering modified cellulose fiber, the method comprises the following steps: adding cellulose and the delustering agent into a spinning solution, and mixing; the spinning solution is under a reaction condition, a surface modifier of the delustering agent activates the surface of titanium dioxide to modify a functional group to form modified titanium dioxide, and the functional group of the modified titanium dioxide and the cellulose form bonding; and producing the cellulose fiber by spinning based on bonding of the modified titanium dioxide and the cellulose, so that the content of the delustering agent remained in the spinning solution is reduced, and the effect of recycling the spinning solution is improved.