349results 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.

To provide a lactic acid polymer composition excellent in transparency, heat resistance and productivity, a molded article, a sheet and a multilayer sheet each of which comprises the composition, a thermoformed article obtained by secondary-forming the sheet or the multilayer sheet, and a process for producing the thermoformed article with excellent productivity. The lactic acid polymer composition of the invention comprises 100 parts by weight of a lactic acid polymer (A), 0.1 to 3 parts by weight of an organic crystal nucleating agent (B) comprising an aliphatic carboxylic acid amide having an amide bond, and 0.1 to 7 parts by weight of a crystallization accelerator (C). The thermoformed article of the invention is obtained with excellent production efficiency by thermoforming the sheet comprising the composition of the invention at a temperature of 60 to 130° C.

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.

Multi-layered cellular metallic glass structures and methods of preparing the same are provided. In one embodiment, the cellular metallic glass structure includes at least one patterned metallic glass sheet and at least one additional sheet. The at least one patterned metallic glass sheet may include multiple sheets connected together to form a group of sheets, and the structure may include a group of sheets sandwiched between two outer sheets. The patterned metallic glass sheets may be patterned by thermoplastically forming two- and / or three-dimensional patterns in the metallic glass sheets. The metallic glass cellular structures are useful in a wide variety of applications, including but not limited to blast protection applications, energy absorption applications, structural support applications, biomedical implant applications, heat exchanger applications, thermal management applications, electrical shielding applications, magnetic shielding applications, and debris and radial

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 invention relates to a non-homogenous core holder for CT (computed tomography) scanning. A rubber cylinder is arranged in a shell; a core left top and a core right top arranged in the rubber cylinder and push against two ends of a multi-layer core mold; a core containing chamber which accommodates the multi-layer core mold is defined by the inner wall of the rubber cylinder, the core left top and the core right top; a left fixed sleeve and a right fixed sleeve are respectively sleeved on the core left top and the core right top; an enclosed annular confining pressure space is defined by the outer wall of the rubber cylinder, the left fixed sleeve, the right fixed sleeve and the inner wall of the shell; the shell is provided with a confining pressure interface, a confining pressure exhaust hole and a confining pressure discharging hole; the core left top is internally provided with a liquid inlet and a core exhaust hole; and the core right top is internally provided with a middle-layer liquid outlet, an upper-layer liquid outlet and a lower-layer liquid outlet. The holder can detect the on-way distribution of fluid saturation in each layer section in a non-homogenous layer on line in real time, and also can observe fluid channeling among layers.

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 the light reflection material technology field and provides a micron order prism pyramid monomer and a manufacturing method thereof. The prism pyramid is capable of accommodating both the light flashing and light reflecting effects, and can exist independently without being attached to a carrier film. Only with adhesive glue, oil painting, hair glue and nail polishing oil and other colorless or colored transparent fluid or liquid media, it is possible to let the prism pyramid monomer to be attached on objects such as films, cloth, wires and plates requiring to be added with light or to realize light flash so that these materials can present the lighting effect. The monomer can be applied widely in great practical use, and the manufacturing method for the monomer is also simple and easy to implement. Therefore, with the method, batched monomer can be produced and used.

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 relates to low-odor PVC powder. The low-odor PVC powder comprises 100 parts of PVC resin, 35-50 parts of plasticizer, 5-10 parts of heat stabilizer, 0.2-1.0 part of light stabilizer, 0.3-1.0 part of antioxidant, 3-5 parts of dispersant and 1-5 parts of deodorant. The deodorant is formed by at least one of nano calcium carbonate, nano zinc oxide, fumed silica, precipitated silica and hot-melt rubber powder. The low-odor PVC powder further comprises a coupling agent formed by at least one of an aluminate coupling agent, a borate coupling agent, an aluminum-titanium coupling, a titanate coupling and dispersible rubber powder, and the mass ratio of the coupling agent to the deodorant is (1-5):100. The invention further provides a preparing method of the low-odor PVC powder. The surface of the deodorant is modified by the coupling agent, and the compatibility between the deodorant and the PVC matrix is improved.

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 invention concerns an injecting / blowing device comprising at least one mold for injecting a thin-walled hollow preform capable of being transformed into a more voluminous hollow body by blowing, said mold including a counter mold defining the inner surface of the cavity, a cure located in the cavity and spaced apart from said inner surface, a preform impression located between the counter mold inner surface and the core, and which will receive the melt, at least two main preferential flow channels (CEPP) optionally at least two secondary preferential flow channels (CEP), each CEP being delimited by at least one recessed zone at the surface of the core and the inner surface of the cavity. Said device is characterized in that: the main CEP are located only at the impression zone corresponding to the zone for transforming the preform; and in that the optional secondary CEP are discontinuous, distinct from the main CEP, and located at the impression zone corresponding to the base and / or the body and / or the ring of the preform.

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.