344results about How to "Maintain mechanical properties" patented technology

A ceramic article which is resistant to erosion by halogen-containing plasmas used in semiconductor processing. The ceramic article includes ceramic which is multi-phased, typically including two phase to three phases. The ceramic is formed from yttrium oxide at a molar concentration ranging from about 50 mole % to about 75 mole %; zirconium oxide at a molar concentration ranging from about 10 mole % to about 30 mole %; and at least one other component, selected from the group consisting of aluminum oxide, hafnium oxide, scandium oxide, neodymium oxide, niobium oxide, samarium oxide, ytterbium oxide, erbium oxide, cerium oxide, and combinations thereof, at a molar concentration ranging from about 10 mole % to about 30 mole %.

A ceramic article useful in semiconductor processing, which is resistant to erosion by halogen-containing plasmas. The ceramic article is formed from a combination of yttrium oxide and zirconium oxide. In a first embodiment, the ceramic article includes ceramic which is formed from yttrium oxide at a molar concentration ranging from about 90 mole % to about 70 mole %, and zirconium oxide at a molar concentration ranging from about 10 mole % to about 30 mole %. In a second embodiment, the ceramic article includes ceramic which is formed from zirconium oxide at a molar concentration ranging from about 96 mole % to about 94 mole %, and yttrium oxide at a molar concentration ranging from about 4 mole % to about 6 mole %.

The invention relates to a computed tomography (CT) scanning heterogeneous model testing system. The system comprises a CT scanning system, a displacement system, an overburden pressure system, a pressure measurement system, a heterogeneous multilayer core clamp holder and a metering system, wherein the heterogeneous multilayer core clamp holder consists of a shell, a rubber cylinder, a core left plug, a core right plug, a left fixing sleeve, a right fixing sleeve, a left fastening sleeve, a right fastening sleeve and a fixed bracket; the core right plug is provided with a plurality of liquid outlets; each liquid outlet is respectively aligned with one layer of core model; and a strip liquid outlet sealing gasket is formed on the core right plug, which correspond to a seam between two adjacent layers of core models, so that liquid flow passing through each layer of core model flows out from the corresponding liquid outlet of each layer of core model, and thus, intraformational heterogeneous water displacing oil layered measurement is realized. By the CT scanning system, the real-time on-line monitoring of the on-way distribution of saturation of fluid on each layer section in a heterosphere is realized so as to observe the interlayer communication phenomenon.

The invention involves composite materials containing a polymer foam and an aerogel. The composite materials have improved thermal insulation ability, good acoustic insulation, and excellent physical mechanical properties. The composite materials can be used, for instance, for heat and acoustic insulation on aircraft, spacecraft, and maritime ships in place of currently used foam panels and other foam products. The materials of the invention can also be used in building construction with their combination of light weight, strength, elasticity, ability to be formed into desired shapes, and superior thermal and acoustic insulation power. The materials have also been found to have utility for storage of cryogens. A cryogenic liquid or gas, such as N₂ or H₂, adsorbs to the surfaces in aerogel particles. Thus, another embodiment of the invention provides a storage vessel for a cryogen.

The invention discloses a preparation method of carbon nano tube fiber-graphene composite material. The method comprises the following steps of: a, preparing carbon nano tube fiber, meanwhile, wetting and modifying the carbon nano tube fiber by solution; b, providing graphene, adding the graphene into water solution, forming uniformly dispersed graphene dispersion liquid under the action of ultrasonic wave; c, dropping a dispersing agent into the graphene dispersion liquid, and stirring uniformly; d, fully contacting the carbon nano tube fiber with the graphene dispersion liquid so as to coat the surface of the carbon nano tube fiber with the graphene; e, then, drying the carbon nano tube fiber coated with the graphene, thereby obtaining the composite material. The carbon nano tube fiber-graphene composite material provided by the invention keeps the mechanical property and the electrical property of the carbon nano tube fiber, and endows the surface of the carbon nano tube fiber with lots of functional modification groups, such as carboxyl, hydroxyl and epoxy group, so that the surface hydrophilicity of the carbon nano tube fiber can be regulated effectively.

The invention relates to the field of high polymer materials and particularly relates to a highly-abrasion-resistant anti-scratching modified PC (polycarbonate) material and a preparation method thereof. The high-abrasion-resistant anti-scratching modified PC material comprises the following raw materials in parts by weight: 65-90 parts of PC, 10-35 parts of abrasion-resistant anti-scratching auxiliary agent, 0.5-1.5 parts of coupling agent, 1-10 parts of toughening agent, 0.1-1 part of antioxidant and 0.1-1 part of lubricating agent. According to the invention, PC is used as a substrate material, and composite systems such as the abrasion-resistant anti-scratching auxiliary agent, the lubricating agent, other auxiliary agents and the like are added, so that the abrasion-resistant anti-scratching property of the material is improved; the abrasion-resistant anti-scratching modified PC material is prepared by adopting high-temperature smelting, mixing and extruding modes in a twin-screw extruder, thus the hardness and abrasion-resistant anti-scratching effect of PC are improved; and modified PC has the advantages of high rigidity, high toughness, high flowability, high heat resistance, bright surface and the like.

The invention relates to a hydrophilization modification method of a polyolefin hollow fiber ultrafiltration membrane, especially relates to a method using dopamine or dopamine derivatives for forming a hydrophilic modification layer on the polyolefin hollow fiber ultrafiltration membrane surface and in membrane holes. The method avoids the influence of polyolefin material structure, can effectively maintain the structural and mechanical properties of the polyolefin membrane, and overcomes the shortcomings that modification in the membrane holes cannot be achieved by irradiation grafting and plasma surface grafting technology. According to the method, an ultrathin poly dopamine or dopamine derivative hydrophilic modification layer prepared by the method can be combined firmly with a polyolefin hollow fiber ultrafiltration membrane material may not be lost in the use process, the modified membrane is stable and reliable in properties, and has good application prospects in water treatment, petrochemical, pharmaceutical, biological, energy and other areas.

This invention relates to preparation method of a flakiness microcrystalline cellulose, as well as its surface reshaping method. The process: in water disperse medium, take reaction with sulfuric acid to gain flakiness microcrystalline cellulose, then surface by acetic acid esterification or SAA absorption modifing, repass wash, filter , dryness, gain the product. The mass ratio of water and cellulose is 3 to 25:1, sulfuric acid volumetric concentration for 30 to 80%, temperature for 10 - to 85 deg, time for 5 to 120 minutes. The mass ratio of acetic ester modifier or SAA and microcrystalline cellulose is 0.1 to 5: 100. The modifier not only keep the favorable physics and mechanical property of cellulose, but also improve dispersibility, greatly advance consistency with high molecular material, broaden the application area.

A bulk, sintered solid solution-comprising ceramic article useful in semiconductor processing, which is resistant to erosion by halogen-containing plasmas and provides advantageous mechanical properties. The solid solution-comprising ceramic article is formed from a combination of yttrium oxide and zirconium oxide. The bulk, sintered solid solution-comprising article is formed from zirconium oxide at a molar concentration ranging from about 96 mole % to about 94 mole %, and yttrium oxide at a molar concentration ranging from about 4 mole % to about 6 mole %.

The invention provides a degradable hydrazide latent epoxy resin curing agent. The curing agent can be polymerized with epoxy resin to generate a degradable crosslinked polymer; and the degradable crosslinked polymer can be degraded in a mixed system of an acid and a solvent under the conditions of heating and stirring. The invention also provides a prepreg, consisting of the curing agent, the epoxy resin, an auxiliary material and a reinforcing material. The invention also provides a reinforcing composite material which is prepared from the curing agent, the epoxy resin, the auxiliary material and the reinforcing material. The reinforcing composite material can be prepared by a prepreg forming method. The reinforcing composite material can be degraded in the mixed system of the acid and the solvent under the conditions of heating and stirring, and can be recycled and reused after being neutralized. The reinforcing composite material has excellent mechanical property and is suitable for the field of application of different composite materials; and the degrading and recycling method of the reinforcing composite material is simple, economic, mild in condition and easy to control.

The present invention provides a dual crosslinked biodegradable polymer and methods of making and using the polymer. The dual crosslinked biodegradable polymer composition includes a multifunctional monomer; a diol; and an unsaturated di-acid at least partially polymerized to form a network and photocrosslinked into a dual crosslinked polymer network.

The invention relates to a preparation method of extrusion resistant, fire preventing and super hydrophobic sponge, solves the technical problem that practical application of oil absorbing materials in the prior art is limited for the reason that large scale production of the oil absorbing materials is very difficult. The preparation method comprises the following steps: coating the surface of melamine resin sponge with poly dopamine, and then modifying the surface of melamine resin sponge with a sulfydryl fluoro long-chain alkane or sulfydryl long-chain alkane. The extrusion resistant, fire preventing and super hydrophobic sponge is prepared by a simple and green synthetic method, the used raw materials are cheap and easy to get, and the synthetic method is simple. The prepared material has the advantages of good super hydrophobic property, good fire preventing effect, good mechanical properties and easy large scale production.

The invention discloses a method for preparing good-stability super-hydrophobic fabrics, which comprises the following steps: dispersing organosilane polymers into an organic solvent so as to obtain 2-50 mg/mL of an organosilane polymer solution; coating the organosilane polymer solution on the surface of a fabric in a dip-coating or spray-coating mode; and carrying out curing processing on the fabric in an ultrasonic and/or heat treatment mode so as to obtain a super-hydrophobic fabric. The super-hydrophobic fabric prepared by using the method disclosed by the invention is excellent in super-hydrophobicity and hydrophobic stability, and keeps the natural mechanical properties and luster and the like of fabrics, therefore, the fabric has wide application in the fields of self-cleaning fibers and fabrics. In addition, the method disclosed by the invention is simple in preparation process, mild in reaction conditions, low in cost, and convenient for mass production.

The invention relates to a preparation method of anti-atomic oxygen polyimide hybrid films containing octamer cage-shaped silsesquioxane structures. In order to obtain a POSS polyimide hybrid film with excellent anti-atomic oxygen (AO) performance with low cost and keep the thermal performance and the mechanical performance of the polyimide, the preparation method adopts tetrahydrofuran as a solvent and alkali as a catalyst to synthesize tetrahydrofuran-diamine POSS containing two active amino groups by adopting a hydrolysis co-condensation method which is simple to operate, low in cost and gentle in reaction condition; and introducing the diamine POSS into a polyimide molecular main chain by adopting a co-condensation method to finally obtain the POSS polyimide hybrid films with excellent anti-AO performances. The preparation method disclosed by the invention is gentle in conditions of a reaction process, low in cost, simple in process, capable of greatly lowering the production cost and beneficial to realizing industrial production.

The invention discloses a cartilage tissue engineering scaffold material and a preparation method thereof. The scaffold material is a three-dimensional porous structure formed by using sodium alginate and chitosan as a base material, and enabling the carboxyl on a side chain of the sodium alginate activated by activation cross-linking agent to react with amino group of chitosan, wherein molar ratio of the sodium alginate carboxyl to the chitosan amino group is (3:7)-(7:3), and the final product only contains two components, sodium alginate and chitosan. The three-dimensional porous scaffold provided by the invention has good biocompatibility, and is suitable for the cartilage tissue engineering.

A solid solution-comprising ceramic article useful in semiconductor processing, which article may be in the form of a solid, bulk ceramic, or may be in the form of a substrate having a ceramic coating of the same composition as the bulk ceramic material on at least one outer surface. The ceramic article is resistant to erosion by halogen-containing plasmas and provides advantageous mechanical properties. The solid solution-comprising ceramic article is formed from a combination of yttrium oxide and zirconium oxide. The ceramic-comprising article includes ceramic which is formed from zirconium oxide at a molar concentration ranging from about 96 mole % to about 91 mole %, and yttrium oxide at a molar concentration ranging from about 4 mole % to about 9 mole %.

The instant invention relates to compositions comprising a benzoxazine resin and an advancement resin based on bisphenol A diglycidyl ether and bisphenol S and, optionally, ferrocene and aluminium trihydrate. Such compositions are, when cured to form polymeric networks, difficultly inflammable and resistant to high temperatures. Such compositions may especially be used in the production of printed wiring boards.

The invention discloses a preparing method of epoxy vacuum pressure immersion resin, which is characterized by the following: utilizing non-poisonous or little poisonous siloxane active diluent with multiple reactivity functional group to reduce the viscosity of epoxy resin; modifying manufacturing property and low-temperature stability; preparing heat-durability low-dielectric consumption product through auto-polymerization reaction of siloxane group and synergic action of reacting group, anhydrides hardener and hardening accelerating agent; fitting for immersing large-medium high-pressured motor line bar, stator coil and other electrical equipment parts without poison or high-volatile component.

The invention discloses a similar material for a small and medium solid-fluid coupled model test and a preparation method thereof. The similar material is prepared from the following raw material components in percentage by weight: 71.7-79.2% of sand, 2.4-8.1% of cement, 2.4-11.0% of kaolin, 2.0-9.0% of vaseline and 4.6-6.7% of water. The preparation method comprises the following steps: weighting the sand, the cement, the kaolin, the vaseline and the water in proportion; stirring the sand, the cement and the kaolin in a stirrer to form a first mixed material, and standing the first mixed material in a room at a temperature of 25 DEG C; uniformly stirring the water and the vaseline in a vessel to form a second mixed material; stirring the first mixed material and the second mixed material at a normal temperature for 3-5 minutes to form a third mixed material, then placing the third mixed material into a forming die, tamping and forming, standing the material at the room temperature for 24 hours after demolding and the like, thereby preparing the similar material. The prepared similar material has the uniaxial compressive strength of 0.3-0.8Mpa, the elastic modulus of 130-223Mpa, the osmotic coefficient of 7.45*10<-7>-9.37*10<-5>cm/s, the cohesive force of 54-87Kpa and the frictional angle of 34-46 degrees and is suitable for simulating the model tests of rocks with different mechanical properties and osmosis.

The invention discloses a flame-retardant PC/ABS composite material with high hydrolysis resistance and a preparation method thereof. The composite material comprises PC resin, ABS resin, a fire retardant, a flexibilizer, a chain extender and other auxiliaries. According to the composite material, the flexibilizer with specific number-average particle size and specific molecular structure and the chain extender with high epoxide equivalent are selected, the hydrolysis resistance of the flame-retardant PC/ABS composite material can be improved by optimizing the raw materials, and the flame-retardant PC/ABS composite material can have relatively ideal flame retardance and mechanical property after being subjected to long-time high temperature and high humidity treatment and is particularly suitable for the occasions with relatively high requirements for the use environments.