104results about How to "Improve surface porosity" patented technology

The invention relates to a method for preparing a small intestinal submucosa (SIS) soft tissue repair patch, and the soft tissue repair patch prepared by the method. The invention also relates to application of the soft tissue repair path to tissue repair.

The invention discloses a method for preparing rose calcium carbonate from low-grade limestone, which comprises the following steps: 1) proportionally calcining low-grade limestone and blind coal to prepare calcium oxide; 2) screening under vibrations to remove coal ash and lime powder, thereby obtaining lumpy lime; 3) adding water to slake the lumpy lime, removing impurities by hydrocyclone and vibration screening to obtain fine emulsion slurry, adding a whitener, and aging to obtain the Ca(OH)2 prime slurry; 4) after regulating the temperature and concentration of the Ca(OH)2 prime slurry, adding a crystal form control agent, carrying out bubbling carbonation reaction, and adding a dispersant; when the pH value of the slurry is lower than or equal to 7, stopping carbonation to obtain a cured slurry; and 5) after the cured slurry is thickened, dehydrating to obtain the rose calcium carbonate. Compared with common light calcium carbonate, the rose calcium carbonate disclosed by the invention has the advantages of higher crystal completeness, high surface porosity, high light scattering coefficient and stronger covering power; and the invention is applicable to the industries of paper making, rubber, plastics and paint.

The invention provides a preparation method of a two-dimensional/one-dimensional heterogeneous nanochannel film. The method is characterized by comprising the following steps that step 1, graphene oxide is dissolved in an aqueous piperazine solution, and ultrasonic treatment is performed at the room temperature to obtain a uniformly dispersed first solution; step 2, the first solution is added dropwise to the upper layer of a porous aluminum oxide film, and after the solvent is evaporated at the room temperature, a first composite film with a graphene oxide film layer and a porous aluminum oxide film layer is obtained; step 3, a benzenetricarbonyl trichloride solution is added dropwise to the upper surface of the graphene oxide film layer of the first composite film, and drying is carriedout to obtain the two-dimensional/one-dimensional heterogeneous nanochannel film. The invention provides the two-dimensional/one-dimensional heterogeneous nanochannel film prepared by using the methodand application of the two-dimensional/one-dimensional heterogeneous nanochannel film in salt difference energy conversion.

An electric hair-trimming device includes a body having two opposite ends, two trimming heads mounted to the two opposite ends of the body, and two endcaps that detachably couple to the two opposite ends of the body to cover the two trimming heads. The endcaps each have a generally flat end surface such that the device can be stood upright on either of the endcaps. In an example embodiment, the trimming heads are provided by a nose-hair trimmer and a detail trimmer. And in another example embodiment, the nose-hair trimmer includes a high surface-porosity foil shroud.

The invention discloses a casing drawing end bearing pile for treating a liquefied foundation and a construction method. The casing drawing end bearing pile for treating the liquefied foundation is that a pile body comprises an inner plastic pipe, an outer plastic pipe, a blind drain, concrete and a geotextile; a casing pile is an end bearing pile; a drilling machine is adopted and is used for drilling a hole so as to insert the outer plastic pipe which is wrapped by the geotextile into a foundation bearing course; the annular draining blind drain of which the diameter is slightly smaller than that of the outer pipe is placed on the inner side of the outer plastic pipe, so as to form a vertical draining channel; the inner plastic pipe is placed on the inner side of the annular draining blind drain; the concrete is poured into the inner plastic pipe to form the pile; and a gravel cushion layer is paved at the top of the pile along the horizontal direction, thus forming a horizontal draining channel. By adopting the casing draining end bearing pile for treating the liquefied foundation and the construction method, the bearing capacity of the pile is improved under the same amount of used concrete, the application range is wide, and the casing draining end bearing pile is applicable to the treatment of a general wear foundation and the liquefied foundation; the horizontal draining channel and the vertical draining channel are provided for foundation liquefying, and thus the possibility that the foundation is liquefied is reduced; and the casing draining end bearing pile is reasonable in structure, good in pile forming effect, low in cost and convenient to construct, and realizes the effects on foundation treatment and seismic hardening.

The invention provides a surface functionalized carbon fiber reinforced polyether-ether-ketone dental composite material. The surface treatment of the carbon fiber reinforced polyether-ether-ketone composite material is carried out by sulfonation and functionalization of graphene oxide to obtain a surface functionalized carbon fiber reinforced polyether-ether-ketone composite material coated witha graphene oxide functional layer, the functional layer has strong binding force to a substrate, is not easy to fall off, and can effectively change the surface geometry and surface functional group composition of the carbon fiber reinforced polyether-ether-ketone composite material, the carbon fiber reinforced polyether-ether-ketone composite material is given with a new surface topography and surface properties, the biocompatibility and osteogenicity are increased, the application in medical materials is increased, the operation method of the invention is simple and easy, the surface treatment condition is mild, and the method is suitable for large-scale promotion and application, and has high medical value.

The invention belongs to the field of air cleaning, and especially relates to a novel filtering material for an air cleaning machine, and a preparation method and a use thereof. The filtering material comprises at least one melt-blown fabric filter layer subjected to surface electrostatic treatment, and an active carbon layer uniformly arranged on the at least one melt-blown fabric filter layer, and the outer side of the at least one melt-blown fabric filter layer is also provided with a polyester skeleton supporting layer. The novel filtering material is an one body formed by sequentially bonding the polyester skeleton supporting layer as a first layer, the melt-blown fabric filter layer as a second layer, the active carbon layer as a third layer, the melt-blown fabric filter layer as a fourth layer and the polyester skeleton supporting layer as a fifth layer, can realize efficient cleaning of solid pollutants and gas pollutants, and can greatly reduce the volume of the filter core of the air cleaning machine and improve the space utilization rate; and the melt-blown fabric filter layers are subjected to the surface electrostatic treatment, so the adsorption efficiency of pollutants is greatly improved under same conditions, and the air cleaning efficiency is improved.

The invention discloses a polyurethane foaming white material. The polyurethane foaming white material comprises combined polyether, a foaming agent and a trimerization type catalyst, wherein the foaming agent comprises trans-1-chloro-3, 3, 3-trifluoropropene, and the trimerization type catalyst is (2-hydroxypropyl) trimethyl ammonium formate. The invention further provides a polyurethane composition. The polyurethane foaming white material has stability in storage, and after the polyurethane foaming white material is placed at room temperature for 1 month, the foaming reaction speed of the polyurethane composition and the heat conduction coefficient of foam are basically unchanged.

A process for manufacturing of an asymmetric hollow fibre membrane, comprising the steps of extruding a polymer solution through the outer ring slit of a hollow fibre spinning nozzle, simultaneously extruding a centre fluid through the inner bore of the hollow fibre spinning nozzle, into a precipitation bath, whereby the polymer solution contains 10 to 26 wt-% of polysulfone (PSU), polyethersulfone (PES) or polyarylethersulfone (PAES), 8 to 15 wt-% polyvinylpyrrolidone (PVP), 55 to 75 wt-% N-alkyl-2-pyrrolidone (NAP) and 3 to 9 wt-% w ater the centre fluid contains 70 to 90 wt-% N-alkyl-2-pyrrolidone (NAP) and 10 to 30 wt-% water, and the precipitation bath contains 0 to 20 wt-% N-alkyl-2-pyrrolidone (NAP) and 80 to 100 wt-% water.

The invention relates to a BX high-end three-dimensional integrated solid-liquid synchronous deeply sewage-treating device and a manufacturing method. The device is characterized by forming a set of complete sewage treating system device by three-dimensionally combining power transmission, double-vortex gearshift, dosing neutralizing, oil-water separation, aeration biochemical treatment, solid-liquid centrifugal separation, sweeping de-sliming, sludge wiping, overhead storage, biologic gnawing, deep physical absorption, malnutrition reduction, PH value, heavy metal (other pollutants), turbidity self-detection, cross circulation backwashing, sterilization and disinfection, water purification and draining, overhead bearing support and automatic control system. The energy consumption is low, the running cost is low and the industrial wastewater, rural sewage, municipal (other) sewage and reclaimed water are locally intensively treated nearby, so that the requirements for standard emission and resource reutilization are met; the device has obvious effects of cleaning production, capacity promotion and effect enhancement; the device has huge national benefit or public benefit at the aspects of water resource shortage, water pollution, sustainable economic development maintenance and promotion for energy saving and emission reduction.

The invention discloses a water-based adhesive which comprises the following components in parts by mass: 0.5-0.7 parts of water-based neoprene latex, 0.3-0.5 parts of acrylic latex, 0.001-0.005 parts of stabilizing agent, 0.001-0.002 parts of antioxidant and 0.03-0.08 parts of nanosilicon dioxide dispersing liquid. The water-based adhesive is excellent in stability, and is not required to be stirred and mixed before use. Compared with the ordinary product, the adhesive power per unit solid content is improved significantly. Superior performance can be obtained by single-sided adhesive spraying under the equivalent occasion. The adhesive effect is particularly good for a base material with a high surface opening degree. The double-sided adhesive spraying contributes to ensuring the comprehensive effect under the occasion with tension, bounce and stress, adhesion can be conducted after a moment according to the different base materials, and the pressure application and adhesion can also be conducted immediately.

The invention relates to a modified PVC (Polyvinyl Chloride) corrugated pipe for concealed-pipe salt removal. The modified PVC corrugated pipe is prepared from the following ingredients in parts by mass: 100 parts of PVC resin, 5-12 parts of plasticizer, 3-6 parts of composite stabilizer, 5-15 parts of novel PVC impact modifier ACM resin, 0.5-1.8 parts of lubricant, 0.5-1.8 parts of processing modifier and 2-20 parts of calcium carbonate. The modified PVC corrugated pipe is low in cost, high in ring stiffness, high in surface opening percent, good in compressive strength, tolerant to salt and alkali corrosion and good in salt removing effect and is mainly applied to the field of concealed-pipe salt removal.

The invention relates to the field of building materials, and particularly discloses recycled aggregate concrete and a preparation method thereof. The recycled aggregate concrete is prepared from the following components in parts by weight: 300 to 340 parts of cement, 150 to 160 parts of water, 85 to 100 parts of fly ash, 65 to 85 parts of mineral powder, 600 to 650 parts of sand, 960 to 1000 parts of stones, 8 to 10 parts of a water reducing agent, 10 to 13 parts of a preservative and 320 to 360 parts of recycled aggregate, the preparation method comprises the following steps: S1, uniformly mixing the cement, the water, the fly ash and the mineral powder to obtain a premixed mixture; and S2, adding the recycled aggregate, the stones, the sand, the water reducing agent and the preservative into the premixed mixture, and uniformly mixing. The recycled aggregate concrete disclosed by the invention has the advantages of strong scouring resistance, good chloride ion corrosion resistance and excellent durability when being used for ocean engineering construction.

The invention discloses a production method of a microcrystalline glass-ceramic composite brick. The production method comprises the following steps: (1) preparing a high-calcium raw material; (2) preparing a low-viscosity glass frit and a high-viscosity glass frit; (3) preparing powder of a green microcrystalline glass-ceramic composite brick through a conventional method; (4) preparing a microcrystalline glass-ceramic composite brick substrate from the powder of the green microcrystalline glass-ceramic composite brick prepared by the step (3) through a conventional method; (5) preparing a microcrystalline glass-ceramic composite brick; and (6) post-processing. The microcrystalline glass-ceramic composite brick prepared by the production method disclosed by the invention, through staggered distribution of crystallization regions and transparent and/or semitransparent regions, changes an original monotonous texture that has only crystallization patterns on the entire surface, and the brick is richer in pattern layering sense and better in decoration effect; the production method disclosed by the invention is lower in sintering temperature, shorter in sintering cycle, and capable of greatly reducing energy consumption, relieving emission and saving manufacturing cost; and the prepared composite brick has fewer surface pores, good anti-fouling performance and high wear resistance.

The invention discloses a modification method and application of activated carbon. The modification method of the activated carbon comprises the following steps of S1, subjecting the activated carbon to drying treatment; S2, introducing a gas into an atmospheric-pressure low-temperature plasma device according to a gas flow rate of 1cc/min to 200cc/min, sending the activated carbon subjected to the drying treatment into the plasma device, making the activated carbon located at an ejection outlet of the low-temperature plasma device, controlling the movement speed of the ejection outlet of the plasma device to be 0mm/s to 30mm/s, and carrying out treatment for 0.5min to 30min, so as to subsequently obtain modified activated carbon. According to the modification method, the modification of the activated carbon through spark discharge is realized through a physical way; the specific surface area of the activated carbon is obviously increased; further, surface functional groups are also more abundant. The modification process is simple and convenient; the efficiency is high; further, no pollutants are generated.

The invention provides a boron-carbide-containing graphite absorber ball and a preparation process thereof. The boron-carbide-containing graphite absorber ball consists of a main structure and a carbon coating attached to the surface of the main structure, wherein the main structure is boron-carbide-containing graphite which comprises the flowing components in percentage by mass: 5-50% of boron carbide and 50-95% of graphite or carbon. Coke powder is added to the formula of the boron-carbide-containing graphite absorber ball, therefore the strength of the product is improved. In the press forming process of the boron-carbide-containing graphite absorber ball, a continuous press is used for pressing and forming a ball-shaped product directly, equipment is simple, the degree of automation is high, and labor cost is low; in addition, since a coating is attached to the surface of the boron-carbide-containing graphite absorber ball disclosed by the invention, the surface porosity is reduced by more than 50%; since no coating is attached to surface of the traditional common boron-carbide-containing graphite absorber ball, the surface porosity is higher. The coating of the boron-carbide-containing graphite absorber ball provided by the invention is prepared by a chemical vapor deposition technology, has good combinability with the main structure and high carbon element content being more than 99.99999% and almost does not contain other impurity elements; the anti-moisture absorption property of the boron-carbide-containing graphite absorber ball provided by the invention is improved about 10-100 times higher than that of the traditional common boron-carbide-containing graphite absorber ball; and the wear resistance of the boron-carbide-containing graphite absorber ball provided by the invention is improved by about 2-10 times.

The invention discloses a preparation method of sodium alginate/L-cysteine/reduced graphene oxide magnetic hydrogel/aerogel. The preparation method comprises the following steps: adding graphene oxide, sodium alginate, nano-iron oxide, L-cysteine and sodium bicarbonate into acidic, alkalic or neutral aqueous solution, performing ultrasonic treatment on the mixed solution and stirring the mixed solution until the mixed solution becomes uniform solution; contacting the mixed solution and divalent metal salt ion solution, so as to obtain unreduced aerogel; performing water-bath heating on the unreduced aerogel into aqueous solution, so as to obtain the sodium alginate/L-cysteine/reduced graphene oxide magnetic hydrogel; performing freeze drying on the magnetic hydrogel, so as to obtain the aerogel. The sodium alginate/L-cysteine/reduced graphene oxide magnetic hydrogel/aerogel prepared by the invention has porous and multi-networks structures and is larger in specific surface area and excellent in mechanical property, salt resistance, alkali resistance and adsorptive property, therefore, the hydrogel/aerogel is suitable for application in different fields; under the action of an external magnetic field, the material can be separated and recycled and has the application potential in more related fields.

The invention provides a battery electrode, a preparation method thereof, and a battery. The battery electrode comprises a current collector and an active substance layer coated on the current collector; a micro-nano particle layer is adhered to the surface of the active substance layer; the active substance layer comprises electrode active substance and electrode binder; the micro-nano particle layer comprises micro-nano dry powder particles; and the micro-nano dry powder particles comprise dry powder particles of the micro-nano electrode active substance. Interface impedance between the electrode and electrolyte is reduced and rate discharge performance of the battery is improved; a micro-nano active material reduces serious volume effect of the material; and specifically, the micro-nano particle layer may not comprise the binder preferably, so that the large-current discharge characteristic of the battery is improved further. The method is simple and is easy to implement; and the combinability between the micro-nano particle layer and the active substance layer is high, and the surface of the active substance layer is not polluted by the substances of an upper layer.

The invention discloses a packing coupling denitrification device and method for rural domestic sewage treatment. The device comprises an aeration tank, an iron-carbon biological denitrification tankand a sedimentation tank which communicate with one another in sequence; the aeration tank communicates with a sewage inlet pipeline; a biofilm Yulong filler and an iron-carbon filler are respectivelyarranged in the aeration tank and the iron-carbon biological denitrification tank; a flow guide plate is arranged at the communication position of the aeration tank and the iron-carbon biological denitrification tank; an air inlet main pipe separately communicates with the aeration tank and the iron-carbon biological denitrification tank and extends into the bottom of the biofilm Yulong filler and the bottom of the iron-carbon filler; the upper part of the aeration tank and the iron-carbon biological denitrification tank are respectively provided with exhaust holes; and a water outlet pipe and a sludge discharge pipe are arranged on the side wall of the sedimentation tank. Biological agents are respectively adsorbed in the aeration tank and the iron-carbon biological denitrification tankin modes of Yulong filler biofilm and iron carbon filler biofilm, so that particulate phosphorus, suspended solid (SS) and heavy-metal ion pollutants in the sewage are removed. The nitrogen and phosphorus removal effect is good, and influence of low C/N ratio on biological denitrification in a sewage treatment process is avoided.

A polyvinylidene difluoride membrane is provided. The polyvinylidene difluoride membrane including polyvinylidene difluoride having a melt viscosity of 35 to 60 (k poise), and the surface of the polyvinylidene difluoride membrane has a pore size of 0.1 [mu]m to 5 [mu]m. A method of manufacturing a porous polyvinylidene difluoride membrane and a method of purifying brine are also provided. The method of purifying brine includes the above-mentioned polyvinylidene difluoride membrane.

The invention relates to a preparation method for a density-controllable light bamboo-wood-based fiber plate. The method comprises the steps that firstly, thermosetting phenolic resin is prepared; secondly, bamboo powder phenolic resin composite foam particles are prepared, then, fir wood fiber, paraffin and the bamboo powder phenolic resin composite foam particles are placed into a mixer, next, amodified urea-formaldehyde resin adhesive is sprayed, and paving is performed after the mixture is uniformly stirred; thirdly, the mixture is placed into a pre-presser for prepressing, and then the product is moved into a hot press to be subjected to hot-pressing treatment; and finally, the product is subjected to pressure relief, cooling, plate cutting and maintenance, and the density-controllable light bamboo-wood-based fiber plate is obtained. According to the method, bamboo powder and the phenolic resin are processed into a foam particle composite system by means of the special treatmenttechnology, and the foam particle composite system is used for replacing a part of layer structures of the fiber plate material; and the purpose of weight reduction is achieved by enhancing the porosity of the original material system, the complexity of the processing technique is effectively lowered, and the controllability of the processing technique and the regulation of the product density areimproved.