28 results about "Cellulose diacetate" patented technology

The invention discloses a cellulose diacetate tube and a melt extrusion formula, method and application thereof. The cellulose diacetate tube comprises cellulose diacetate, glycerol triacetate, polyethylene glycol, an antioxidant and a whitening agent. The cellulose diacetate tube is prepared from 50-80 parts by mass of cellulose diacetate, 10-30 parts by mass of glycerol triacetate, 5-30 parts by mass of polyethylene glycol, 0.1-2 parts by mass of an antioxidant and 0.1-5 parts by mass of a whitening agent. The cellulose diacetate tube prepared from the formula, the method and the application can meet the whiteness and hardness standards of filter tubes for cigarettes.

A method of manufacturing an injection molded article, the method comprising: providing a flowable melt composition comprising cellulose diacetate, a viscosity-reducing additive, and a chemical blowing agent; introducing the flowable melt composition into a mold cavity of an injection molding machine; molding the flowable melt composition in the mold cavity at a pressure P, a temperature T, and a cycle time C to form the injection molded article having a length L and a density D in a range of 0.9 to 1.6 g / cc, wherein the method exhibits at least one of: a reduced pressure P, a reduced temperature T, a shortened cycle time C, when compared to an injection molded article using a melt composition identical to the flowable melt composition of the present application but not containing the chemical blowing agent.

The application relates to a water-based ink with high adhesion and a preparation process thereof, wherein the water-based ink at least comprises the following raw materials in mass parts: 100-140 parts of acrylic emulsion; 120-160 parts of titanium white powder; 20-60 parts of ethylene glycol; 0-5 parts of functional additives; 80-100 parts of organic pigment; 400-600 parts of deionized water; porous cellulose, the added mass of the porous cellulose is 0.08-0.16 times the sum of the mass of the acrylic emulsion and the titanium white powder, and the Zeta potential of the porous cellulose at pH=7 is not more than -45 mV; the porous cellulose is obtained by dissolving cellulose diacetate, solidifying and phase separating, and then hydrolyzing and regenerating in a hydrolysis bath, the hydrolysis bath is an aqueous solution of sodium hydroxide and a potential adjusting agent, and the potential adjusting agent is at least one of triethylamine, diethylamine and ammonia water. The water-based ink in the application not only has good adhesion with a printing substrate, but also has good adhesion in itself.

The invention discloses a method for detecting cellulose diacetate acetone slurry insoluble substances (AIS). The method comprises the following steps: preparing a composite solution; dissolving an AIS sample in the composite solution; a nuclear magnetic resonance spectrometer (NMR) is adopted to measure the sample. The method provided by the invention can realize complete dissolution and structural analysis of AIS under mild conditions, and is suitable for dissolution and rapid structural detection of cellulose diacetate acetone slurry insoluble substances with different raw material sources.

The utility model discloses a kind of heating reaction kettle convenient to feed, it is related to cellulose diacetate processing technical field, including base and discharging assembly, main kettle body is installed in the middle of base upper end, and main kettle body left side lower end is provided with discharge gate, and main kettle body upper end is provided with top cover, top cover upper end both sides are provided with discharging assembly, and discharging assembly includes ration cylinder, servo motor, feed auger, feed inlet, feed pipe and ration pump, servo motor is installed in the middle of ration cylinder upper end, and feed auger is connected in the front end of servo motor, feed inlet is provided in the left side upper end of ration cylinder, feed pipe is provided in the right side of top cover upper end, and ration pump is connected in the front end of feed pipe, mixing assembly is arranged in the inside of main kettle body.The heating reaction kettle convenient to feed can be accurately rationed according to the processing of cellulose diacetate, while improving the overall practicality of heating reaction kettle, avoid processing to be influenced.

The application belongs to the technical field of oil-water separation materials, and discloses a solvent-resistant hydrophilic stereocomplex polylactic acid oil-water separation membrane and a preparation method thereof. The preparation method is as follows: stereocomplex polylactic acid (sc-PLA) nanofiber membranes are obtained by electrospinning after biodegradable poly-L-lactic acid (PLLA) and poly-D-lactic acid (PDLA) are polymerized by a solution method; and the sc-PLA membranes are subjected to phase separation treatment by using cellulose diacetate (CDA) and silicon dioxide (SiO2). The solvent-resistant hydrophilic sc-PLA membrane material prepared by the application has the characteristics of porous, high specific surface area and nanoscale diameter; meanwhile, the hydrophilic sc-PLA membrane has excellent mechanical properties and good solvent stability, and the modified sc-PLA membrane can be completely biodegraded and is an environment-friendly material.

The invention belongs to the technical field of composite solid electrolytes, and particularly relates to a cellulose diacetate-based composite solid electrolyte and a preparation method and application thereof.The preparation method comprises the steps that cellulose diacetate is dissolved in ionic liquid, and a solution A is obtained; introducing a lithium salt into the solution A to obtain a mixed solution B; adding a polymeric monomer and a thermal initiator into the solution B to obtain a mixed solution C; adding ion conductor ceramic nanofibers into the mixed solution C to obtain electrolyte slurry; and performing thermal polymerization to form the film. The combination of the high-strength cellulose diacetate and the ceramic nanofibers in the composite solid electrolyte can obviously enhance the mechanical strength of the electrolyte, effectively resist the growth of lithium dendrites in the charging and discharging process and prevent penetration, and meanwhile, the ionic liquid serving as an ion bridge contributes to the formation of a continuous organic-inorganic interface, so that the performance of the composite solid electrolyte is improved. Efficient migration of ions at a cellulose diacetate-ceramic interface is promoted, so that the ionic conductivity and the cycling stability of the battery are improved.

The invention discloses hydrogel mask fiber base cloth containing banana components and a preparation method of the hydrogel mask fiber base cloth, and relates to the technical field of mask fiber base cloth. The method comprises the following steps: preparing banana stem fiber microcrystals, low-esterification-degree banana peel pectin and a banana active stock solution; carrying out hydrophobic modification on fiber microcrystals, and blending with polylactic acid, cellulose diacetate and the like to prepare a reinforced spinning precursor; performing electrostatic spinning and hot-press shaping to obtain fiber base cloth; secondly, introducing 2-hydroxyethyl methylacrylate and acrylic acid into the base cloth through chemical grafting, and curing with a banana peel pectin solution and calcium chloride in sequence to obtain modified hydrophilic base cloth; finally, the base cloth is soaked in the banana active stock solution, and the hydrogel mask fiber base cloth is prepared through vacuum loading, quick freezing and freeze drying. According to the invention, all components of bananas are fully utilized, and the prepared base cloth has good mechanical strength, hydrophilicity and biocompatibility, is environment-friendly and has comprehensive effects.

The invention discloses a preparation system and method for adding functional substances into tows, and relates to the technical field of cigarette tow manufacturing. In order to solve the problems that in the prior art, particulate matter addition is limited by acetone or a water-soluble additive, solid particles are prone to agglomeration, and spinning is difficult, functional substances (such as inorganic particles and organic particles) and cellulose diacetate acetone slurry are subjected to high-shear sanding dispersion through a dispersion system (a sand mill with a cooling jacket); secondary agglomeration of particles is inhibited by using slurry viscosity, and uniform mixing is realized by adjusting sanding parameters. The method breaks through the addition limitation of insoluble substances, improves the dispersion uniformity and addition concentration of functional substances, is low in improvement cost, and is adaptive to an existing production line. The problem of dispersion of functional substances in the acetate fiber tow is effectively solved, and the functional application range of the tow is expanded.

The utility model relates to the technical field of cellulose diacetate spectacle plates, in particular to an environment-friendly cellulose diacetate spectacle plate, which is characterized in that a plurality of transverse plates are fixedly connected to the inner sides of two vertical plates, and the outer walls of the transverse plates are respectively connected with an upper layer, a thin layer pattern, a lower layer and a wear-resistant layer in a sliding manner through clamping grooves. According to the environment-friendly cellulose diacetate glasses plate, the transverse plates are inserted into the clamping grooves in the two sides of the upper-layer pattern, the thin-layer pattern, the lower-layer pattern and the wear-resistant layer respectively, and then the multiple upper bolts are rotated to be screwed into the upper-layer transverse plates and the upper transverse plates in sequence; and then a plurality of lower bolts are rotated to enable the bolts to be sequentially screwed into the wear-resistant layer and the lower transverse plate, so that the upper layer, the thin layer pattern, the lower layer and the wear-resistant layer are fixed together, and therefore, during splicing, harmful gas cannot be generated, the environment cannot be polluted, and the environmental protection property is improved; and good wear resistance is achieved, and the service life of the whole structure is prolonged.

The invention discloses a porous hollow hydrophilic polylactic acid nanofiber separation membrane and a preparation method thereof, and belongs to the technical field of oil-water separation materials, the porous hollow hydrophilic polylactic acid nanofiber separation membrane is prepared from biodegradable polylactic acid (PLA) and water-soluble polyvinyl alcohol (PVA) through a coaxial electrostatic spinning method, a shell layer of the porous hollow hydrophilic polylactic acid nanofiber separation membrane is PLA, and the shell layer of the porous hollow hydrophilic polylactic acid nanofiber separation membrane is a porous hollow hydrophilic polylactic acid nanofiber separation membrane. A core layer is water-soluble PVA, and then a layer of cellulose diacetate CDA nanofiber is spun on the surface through electrostatic spinning; finally, the prepared fiber membrane is immersed in deionized water to be subjected to ultrasonic treatment for 30 minutes, the porous hollow fiber membrane is obtained after drying, the prepared porous hollow hydrophilic polylactic acid nanofiber membrane has the advantages of being porous, high in specific surface area and hollow in structure, and the prepared membrane material is natural, degradable and non-toxic and harmless to the environment.

This invention discloses a fluorescent probe molecule, a fluorescent cellulose nanoparticle membrane, and their applications. The fluorescent probe molecule uses methylene blue as the fluorophore and allyl groups as the recognition sites. The fluorescent cellulose nanoparticle membrane is prepared by uniformly mixing the fluorescent probe molecule with cellulose diacetate to form a spinning solution, and then using electrospinning technology to obtain a flexible fluorescent sensing film. The resulting flexible fluorescent sensing film is a fluorescent cellulose nanoparticle membrane for carbon monoxide detection. The prepared fluorescent probe molecule has advantages such as simple operation, low cost, high selectivity, rapid response, and real-time monitoring, making it suitable for detecting carbon monoxide in the ecological environment. The combination of the cellulose diacetate membrane and the fluorescent probe molecule not only improves the detection performance and application range but also reduces costs and environmental impact, demonstrating broad application prospects.

This invention relates to a high-efficiency stirring device and method for cellulose diacetate (CDA) acetone solutions. The core of the device includes a sealed explosion-proof vessel, a coaxial reverse drive system, a central eight-bladed airfoil shear assembly, a lower anchor-type composite stirring assembly, and a positive-pressure isolation double-end-face sealing system. The device synchronously drives the hollow short shaft and the solid long shaft to rotate in opposite directions via a bevel gear set. The central impeller forms an axial main circulation flow field and a high-intensity shear zone, while the lower anchor-type impeller sweeps the vessel wall and bottom to eliminate low-speed dead zones. Together, they construct a three-dimensional composite flow field of "upward push and downward disturbance," effectively improving the dissolution efficiency of high-solids-content, high-viscosity CDA acetone solutions. The positive-pressure double-end-face sealing system uses back-to-back dynamic and static rings and an inert isolation liquid to achieve zero acetone vapor leakage, meeting chemical explosion-proof safety standards. The accompanying method, through staged speed control and flow field optimization, adapts to the viscosity changes at different dissolution stages and is suitable for continuous industrial production scenarios.

This invention belongs to the field of cellulose acetate tow preparation technology, and discloses a method and system for preparing multifunctional cellulose diacetate tow. The method includes steps such as dissolving cellulose diacetate, mixing functional additives, and spinning. By controlling the opening and closing of control valves on the first and second conveying pipelines, the method selectively guides the filtered cellulose diacetate solution to a first spinning device for conventional spinning, and / or to a mixing device for mixing with functional additives, and then to a second spinning device for functional spinning. This preparation method and system not only meet the requirements of multi-path production of multifunctional cellulose diacetate tow, enabling the addition of different types and proportions of functional substances, but also accommodates conventional product production lines without affecting existing production lines and processes. The production line has the advantages of flexible production with elastic switching and rapid recovery.

The invention discloses a polylactic acid tow for a cigarette filter as well as a preparation method and application of the polylactic acid tow. The polylactic acid tow comprises the following raw materials: polylactic acid, a cellulose diacetate grafted hyperbranched polymer, polypropylene carbonate and an antioxidant. The cellulose diacetate grafted hyperbranched polymer is prepared from cellulose diacetate and an amino-terminated hyperbranched polymer through a reaction. According to the invention, the cellulose diacetate grafted hyperbranched polymer and the polypropylene carbonate are added into the polylactic acid, and the introduction of the cellulose acetate can solve the problem of adhesion of the filter stick; the grafting of the hyperbranched polymer can improve the interfacial compatibility of the cellulose acetate and the polylactic acid, increase the plasticization of the cellulose diacetate and widen the processing window temperature.

The invention belongs to the technical field of cellulose diacetate production and processing, and particularly relates to a fine boiling device for cellulose diacetate production and processing, which comprises a high-pressure reaction kettle body, the bottom of the high-pressure reaction kettle body is fixedly connected with a plurality of uniformly distributed support legs, and the top of the high-pressure reaction kettle body is fixedly provided with a kettle cover. A stirring assembly is arranged between the kettle cover and the interior of the high-pressure reaction kettle body, a pressure sensor and a temperature sensor are fixedly mounted on the left side and the right side of the interior of the kettle cover in a penetrating manner respectively, and a feeding assembly is arranged above the outer surface of the high-pressure reaction kettle body; the device can improve the production efficiency and reaction uniformity of cellulose diacetate by controlling feeding and stirring, automatically adjust operation conditions, avoid human intervention, reduce errors and ensure the stability of the production process, and can adjust the feeding and stirring speed according to the temperature and pressure change in the reaction process, thereby improving the production efficiency and reaction uniformity of the cellulose diacetate. And the device adapts to different reaction stages, so that the device has a better using effect.

The application discloses a method for recycling cellulose diacetate in waste filter rods for cigarettes, and sequentially comprises the following steps: A, surface humidification; B, sectioning; C, low-shear paper stripping; D, separation of forming paper; E, microwave heating-high-speed airflow blowing to remove glycerol triacetate; F, preparation of a high liquid-solid ratio solution; G, standing and discharge of precipitate; H, secondary dissolution and concentration; I, fractional filtration; and J, spinning. The method reduces impurities in the spinning slurry during the recycling process, simplifies the subsequent filtration link, and can efficiently and conveniently implement the waste filter rod recycling of the filament bundle.

The invention discloses a method for improving viscosity of cellulose diacetate acetone slurry, which comprises the following steps: preparing cellulose diacetate acetone slurry with certain mass fraction, adding hemicellulose derivatives with certain mass fraction and substitution degree, and stirring to form uniform mixed slurry; the problem of low slurry viscosity caused by a cellulose diacetate source is solved. The viscosity of the slurry is improved by adding a small amount of hemicellulose derivatives into the cellulose diacetate acetone slurry with a certain mass fraction, so that the problems that when cellulose diacetate from different sources is used, due to the fact that the viscosity of the slurry is too low, the flowability of the slurry is too high, and fibers in spinneret orifices cannot keep a stable state are solved; therefore, the purpose of maintaining the production stability of the acetate tows can be achieved.

A filter rod for flue gas filtration is disclosed, the filter rod being made of bulky yarn; the bulky yarn comprises a central, high-shrinkage core yarn and a surrounding, low-shrinkage outer yarn, the outer yarn forming multiple sequentially connected loops along the core yarn. The core yarn is made from any one or a mixture of polylactic acid, polypropylene carbonate, polylactic-co-hydroxyacetic acid copolymer, polybutylene adipate / terephthalate, polycaprolactone, poly-β-hydroxybutyrate, polyhydroxyalkanoate, and polybutylene succinate. The outer yarn is made from any one or a mixture of cellulose fiber, cellulose monoacetate fiber, cellulose diacetate fiber, cellulose triacetate fiber, alginate fiber, chitosan fiber, milk silk fiber, soybean fiber, and silk fiber. This design not only replaces diacetate fiber in the application of tobacco filter rods but also frees up production capacity.

The invention relates to a method for preparing cellulose diacetate fibers by using waste filter sticks as raw materials. The method comprises the steps of quantitative humidification, low-cutting-rate paper squeezing, rubbing and stripping, forming paper separation, vacuumizing and drying to remove glyceryl triacetate, dissolution, graded filtration and spinning. The method has the advantages that by means of the pretreatment technology of quantitative humidification and low-cutting-rate paper squeezing, rubbing and stripping, the integrity rate of the formed paper is effectively increased, and the generation amount of small-size fragments is reduced; and vacuum drying is combined to replace hot water washing, so that micron-sized fragment dissociation is avoided, the slurry filtering flux is stably improved, meanwhile, the replacement period of a filter material is prolonged, and the core bottleneck that the filtering flux is quickly attenuated in a traditional process is fundamentally solved.

The invention discloses functional bio-based plasticizer modified cellulose diacetate colloidal particles and a preparation method thereof, and relates to the technical field of high polymer materials, the functional bio-based plasticizer modified cellulose diacetate colloidal particles comprise cellulose diacetate, a functional bio-based plasticizer and a stabilizer; wherein the cellulose diacetate accounts for 45-84.8 parts by weight; 15 to 35 parts of a functionalized bio-based plasticizer; 0.2 to 2 parts of a stabilizer; the functionalized bio-based plasticizer is prepared from a compatilizer and a bio-based plasticizer through a ring-opening esterification reaction, and is prepared based on the formula. According to the invention, a functionalized bio-based plasticizer is introduced into a cellulose diacetate system, so that bio-based plasticizer molecules and cellulose diacetate molecules form a good interfacial compatible structure through side chain active functional groups while keeping a flexible long-chain structure to provide a plasticizing effect; therefore, the compatibility stability and the structural uniformity of a material system are remarkably improved.

The application discloses a kind of high toughness cellulose diacetate composite material and preparation method thereof, it is related to high polymer material technical field, including following mass formula: cellulose diacetate, 45-84.9 parts;Plasticizer, 0.1-3 parts;Antioxidant graft mesoporous silica, 15-50 parts;Plasticizer is phthalic acid plasticizer or environment-friendly non-phthalic acid ester plasticizer;Cellulose diacetate is prepared by wood pulp or cotton pulp as raw material;And preparation is carried out based on above-mentioned formula.The application mixes antioxidant graft mesoporous silica and raw material, plasticizer by one-step method, and glue particle is obtained by extruder, which is convenient for industrial production;While preparation process is simple, and the required material is green and environment-friendly, and it is easy to meet the requirements of industrial production;Moreover, the application can effectively improve the antioxidant effect on cellulose diacetate material under the premise of ensuring the dispersion compatibility of auxiliary agent, and does not affect other excellent properties.

The present application relates to the technical field of fiber preparation, and more particularly to a diacetate fiber tow preparation control method and system. The scheme includes setting the cross-sectional shape, linear density and smoke cavity of the cross section of the diacetate cellulose filament, setting the production process of the diacetate cellulose filament, and starting the production of the filament; by reducing and increasing the amount of filament filled in the smoke cavity, the filter rod with the smallest circumference and the filter rod with the largest circumference are obtained; the minimum filament feeding amount is extracted according to the filter rod with the smallest circumference; the maximum filament feeding amount is extracted according to the filter rod with the largest circumference; and the filament feeding amount is adjusted online according to the constraints of the minimum filament feeding amount and the maximum filament feeding amount. The scheme realizes precise weight control of the diacetate fiber tow preparation process by designing an evaluation of the fillable amount of the diacetate cellulose filament for a hollow filter rod and combining production process control.

This invention belongs to the field of composite solid electrolyte technology, specifically relating to a cellulose diacetate-based composite solid electrolyte, its preparation method, and its application. The method includes dissolving cellulose diacetate in an ionic liquid to obtain solution A; introducing a lithium salt into solution A to obtain a mixed solution B; adding a polymerizable monomer and a thermal initiator to solution B to obtain a mixed solution C; adding ion-conducting ceramic nanofibers to mixed solution C to obtain an electrolyte slurry; and thermally polymerizing to form a film. The combination of high-strength cellulose diacetate and ceramic nanofibers in this composite solid electrolyte significantly increases the mechanical strength of the electrolyte, effectively resisting lithium dendrite growth during charge and discharge and preventing penetration. Simultaneously, the ionic liquid acts as an "ion bridge," facilitating the formation of a continuous organic-inorganic interface and promoting efficient ion migration at the cellulose diacetate-ceramic interface, thereby improving the battery's ionic conductivity and cycle stability.

The invention discloses a method for reducing the viscosity of high-concentration cellulose diacetate acetone slurry, which can solve the filtering problem caused by overhigh viscosity of the high-concentration cellulose diacetate acetone slurry. The method for reducing the viscosity of the high-concentration cellulose diacetate acetone slurry provided by the invention comprises the following steps: dissolving cellulose diacetate by taking an acetone aqueous solution with the mass concentration of 95% as a solvent, preparing a high-concentration cellulose diacetate acetone slurry sample, and measuring the viscosity of the high-concentration cellulose diacetate acetone slurry sample; preparing acetone aqueous solutions with different mass concentrations, dissolving the cellulose diacetate, preparing a cellulose diacetate acetone slurry sample with the same mass concentration as the cellulose diacetate acetone slurry sample in the first step, and measuring the viscosity of the cellulose diacetate acetone slurry sample; and adjusting the mass concentration of the acetone aqueous solution for production, and dissolving the cellulose diacetate to obtain the cellulose diacetate acetone slurry with lower viscosity. According to the method, the viscosity of the high-concentration cellulose diacetate acetone slurry is reduced by changing the polarity of the solvent, so that the problems that the filtration pressure difference is increased, the permeation amount is reduced and the like due to overhigh viscosity of the slurry are avoided, and the aim of maintaining the production stability of acetate fiber tows can be achieved.

The utility model relates to the technical field of glasses plates, and discloses a pair of glasses, which comprises glasses frames, the glasses frames are made of externally plasticized cellulose diacetate transparent glasses plates, the number of the glasses frames is two, a connecting frame is fixedly arranged between the two glasses frames, one side of each of the two glasses frames is fixedly provided with a fixing frame, and the fixing frames are fixedly connected with the connecting frame. One end of each fixing frame is rotationally connected with an ear frame, mounting assemblies are arranged on the outer surfaces of the two glasses frames, and nose pad assemblies are arranged in the mounting assemblies. Through the arrangement of the mounting assembly and the nose pad assembly, the situation that the whole glasses cannot be used due to the fact that nose pads are damaged is avoided, and the overall service life is prolonged.

The invention belongs to the field of oil-water separation materials, and discloses a PLA / CDA (at) PDA-BC composite membrane for oil-water separation and a preparation method and application of the PLA / CDA (at) PDA-BC composite membrane. According to the composite membrane, a nanofiber membrane composed of biodegradable polylactic acid (PLA) / cellulose diacetate (CDA) core-shell structure nanofibers is used as a substrate, and then a multifunctional separation layer is constructed through polydopamine (PDA) bionic adhesion and bacterial cellulose (BC) network combination and through a vacuum suction filtration method. The PLA / CDA / PDA-BC composite membrane material prepared by the invention has aperture gradient distribution and special wettability, combines the structural advantages of core-shell fibers and the green characteristic of a bio-based material, and has important application value in the field of oily wastewater treatment.

The invention discloses a particle preparation method based on a functional cellulose composite material, particles and application, and relates to the technical field of cellulose composite material preparation, the method comprises the following steps: pouring cellulose diacetate powder, hydroxymethyl cellulose and acetic acid into a pot, stirring and mixing to obtain a base material mixture; galactomannan and Arabic gum are added into the base material mixture, distilled water is added at the same time, stirring is continued, and a particle preparation soft material is obtained; carrying out wet-process extrusion granulation on the granular soft material in a wet-process extruder to obtain a cylindrical strip-shaped object; the cylindrical strip-shaped object is put into a rolling machine, and round wet particles are obtained after rolling; and carrying out drying and particle size screening on the round wet particles to obtain the functional cellulose composite material particles. The technical problem that in the prior art, due to the fact that blasting beads are pinched to break essence under external pressure, the release amount of the essence in the earlier stage is large, and the fragrance in the later stage is insufficient is solved.