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89results about How to "Overcoming Dispersion" patented technology

Manufacturing method of inorganic particle filled polyimide film

The invention discloses a manufacturing method of an inorganic particle filled polyimide film, in particular to a manufacturing method of an inorganic particle filled polyimide film which adopts a small-sized grinding ball as a grinding medium and also adopts a grinding machine to uniformly and stably disperse inorganic particles into an organic solvent, thereby improving the transparency and mechanical properties of the film. The manufacturing method comprises the following steps: adding a grinding ball with the diameter no more than 6mm into the grinding bucket of a grinding machine with a moving medium, and adding and grinding part of organic solvent, inorganic particles and surfactant until the inorganic particles are uniformly dispersed in the organic solvent, thereby obtaining inorganic particle/organic solvent suspension; adding the inorganic particle/organic solvent suspension, the remaining organic solvent and diamine and dianhydride with identical molar numbers into a reactor, and preparing inorganic particle/polyamic acid solution suspensoid in a conventional method; and preparing the inorganic particle filled polyimide film with the inorganic particle/polyamic acid solution suspensoid according to the production process of the conventional flow casting method. The film has the advantages of good transparency and excellent mechanical properties.
Owner:天津恒通时代电工材料科技有限公司 +1

Method for separating zinc and indium and iron from indium-enriched high-iron high-zinc calcine through reduction-magnetic separation

The invention relates to a method for separating zinc and indium and iron from indium-enriched high-iron high-zinc calcine through reduction-magnetic separation, belonging to the technical field of mineral processing. The invention is characterized in that the method adopts the technical means that mineral dressing is combined with smelting and performs smelting firstly and mineral dressing secondly; and the method is as follows: the waste heat of the indium-enriched high-iron zinc calcine obtained through fluidized roasting is utilized, the indium-enriched high-iron zinc calcine is introduced to perform low-temperature weak reduction treatment at below 570 DEG C and ensure that zinc ferrite is decomposed and reduced to ZnO, Fe3O4 and iron, the reduced calcine is levigated to prepare slurry, and zinc and indium and iron is separated through wet-type magnetic separation to obtain iron ore concentrates and indium-enriched zinc- enriched ore concentrates. The method has low energy consumption and low dosage of a reducing agent, is simple in operation, easy in control and high in metal recovery rate. Therefore, the indium embedded and distributed in zinc ferrite can be released, the loss caused by the high temperature volatilization of indium can be avoided, and the zinc and indium and iron of the indium-enriched high-iron high-zinc calcine can be separated in an ore dressing manner before leaching.
Owner:KUNMING UNIV OF SCI & TECH

Base band digital signal encoding modulation integrated system

The invention provides a base band digital signal encoding modulation integrated system comprising a cascade encoding module, a PCM/PSK/PM modulation module and a BPSK/NRZ modulation module. The system is characterized by further comprising a control subsystem used for controlling encoding modulation modes of the cascade encoding module, the PCM/PSK/PM modulation module and the BPSK/NRZ modulation module, wherein the subsystem further comprises an interface module, a first multiplexer, an SRRC-OQPSK modulation module, a data distributor, a multiplexer and a control logic module. The first multiplexer is used for selecting data in one path from two path data output from the interface module and outputting the data to a post-stage circuit which is the cascade coding module. The system is used for completing reed-solomon (RS) coding interface data selection of base band data and coding framing, and can correspondingly select different modulation mode functions according to different transmission code rates including a low transmission code rate, a medium transmission code rate and a high transmission code rate. The system correspondingly selects PCM/PSK/PM.BPSK/NRZ and RC-OQPSK modulation modes according to a downlink low data code rate, a downlink medium data code rate and a downlink high data code rate after achieving base band signal encoding.
Owner:NAT SPACE SCI CENT CAS

Waste polypropylene modified thin-walled corrugated tube and manufacture method thereof

The invention relates to a waste polypropylene modified thin-walled corrugated tube. The waste polypropylene modified thin-walled corrugated tube is made from the following ingredients in parts by weight: 97-99.9 parts of modified polypropylene and 0.1-3 parts of oxidation inhibitor; and the modified polypropylene is made by mixing waste polypropylene with a modification additive, and the modified polypropylene is made from the following ingredients in parts by weight: 73-81 parts of waste polypropylene, 3-6 parts of peroxide master batch, 15-20 parts of micromolecular monomer master batch and 0.3-0.6 part of stearate. The thin-walled corrugated tube is made through carrying out melt extrusion on the waste polypropylene by a plastic extruder after the melt strength of the waste polypropylene is improved by modification, and a manufacture method of the waste polypropylene modified thin-walled corrugated tube comprises the steps of manufacturing activated inorganic powder, manufacturing the peroxide master batch, manufacturing the micromolecular monomer master batch, manufacturing the modified polypropylene, manufacturing the thin-walled corrugated tube, and the like. The waste polypropylene modified thin-walled corrugated tube is good in forming and high in melt strength; and the manufacture method of the waste polypropylene modified thin-walled corrugated tube is simple in technological process, low in production cost and free in environmental pollution.
Owner:柳州市瑞和塑料科技有限责任公司

Silicate ester modified polyamide reverse osmosis composite membrane and preparation method thereof

The invention provides a method for modifying a polyamide reverse osmosis composite membrane by the use of silicate ester. The preparation method comprises the following steps: firstly pouring an aqueous phase solution containing an aromatic polyamine compound onto the surface of a polysulfone ultrafilter membrane support layer; draining and then immersing the membrane surface with an organic liquid phase containing a proper amount of aromatic acyl chloride to contact with a water phase, wherein the organic phase or the water phase contains a proper amount of silicate ester; carrying out interfacial polymerization with the assistance of silicate ester so as to obtain a polyamide active layer; and carrying out heat treatment so as to obtain a modified polyamide reverse osmosis composite membrane. On one hand, the silicate ester is used as a cosolvent during the interfacial polymerization process so as to adjust the membrane structure; on the other hand, the silicate ester is used as a silicon source and undergoes hydrolytic polymerization during the interfacial polymerization and post-processing to generate silica nanoparticles which are doped in a polyamide separating layer. The silicate ester-assisted interfacial polymerization method combines advantages of cosolvent and inorganic nanoparticles. Through silicate ester-assisted interfacial polymerization, the reverse osmosis composite membrane with high water flux and high salt rejection is prepared.
Owner:OCEAN UNIV OF CHINA

Colorized GRC product prepared from multi-grading waste glass and preparation method thereof

The invention discloses a colorized GRC product prepared from multi-grading waste glass and a preparation method thereof. The colorized GRC product comprises waste glass composite colorized decorative surface layer and a waste glass composite structural layer. The preparation method comprises the following steps: recycled waste glass is classified according to color, levigated and added to a GRC surface layer so as to prepare the decorative surface layers with specified colors; at the same time, the waste glass with various colors are prepared into fine aggregate and coarse aggregate according to grading so as to prepare the structural layer. According to the invention, the waste glass is adopted to replace aggregate, so that the waste is efficiently utilized, the colorized glass is used as different color tone to replace pigments and to be added to the GRC product, the defects that the pigments are not uniformly distributed and the pollution is serious in the later period are overcome, the artistry of GRC decoration is improved, and various properties of fiber reinforced cement can be improved. The technology is simple, higher economical and environmental benefits are obtained, and high value-added resource utilization is realized.
Owner:江苏倍立达新材料科技有限公司

Method for gradient and length-diameter ratio CNTs reinforced copper-based composite materials of laser-induction composite melting deposition

The invention discloses a method for gradient and length-diameter ratio CNTs reinforced copper-based composite materials of laser-induction composite melting deposition. The method for the gradient and length-diameter ratio CNTs reinforced copper-based composite materials of the laser-induction composite melting deposition is characterized by comprising a first step of adopting a method of rotating electrophoresis to carry out screening on carbon nano tubes, a second step of respectively and evenly mixing the screened and obtained carbon nano tubes with copper alloy powder on a ball grinding mill according to a length-diameter ratio in a gradient-increase mode, and a third step of adopting the method of laser-induction composite melting deposition to prepare the CNTs reinforced copper matrix composite materials of the length-diameter ratio. The method for the gradient and length-diameter ratio CNTs reinforced copper-based composite materials of the laser-induction composite melting deposition has the advantages that the carbon nano tubes are screened and obtained through a method of rotating the electrophoresis, chemical nickel plating processing is carried out on copper matrix composite powder distributed of the CNTs in a disperse mode, high temperature oxygen of the copper matrix composite powder and wetting performance of the CNTs and a copper alloy are improved, gradient distribution of the CNTs which are different in length-diameter ratio in the copper matrix composite materials is achieved, valuable materials are notably saved, manufacturing cost is reduced, and a manufacturing cycle is shortened.
Owner:NANCHANG HANGKONG UNIVERSITY

Anti-flaming phase-change energy storage, heat preservation and heat insulation material and preparation method thereof

The invention discloses an anti-flaming phase-change energy storage, heat preservation and heat insulation material and a preparation method thereof. The anti-flaming phase-change energy storage, heat preservation and heat insulation material is prepared from the following components: modified polyether polyol, polymethylene polyphenyl isocyanate, diethanol amine, triethylene diamine, stannous octoate, silicone oil, normal hexane, water, ammonium polyphosphate and melamine, wherein the modified polyether polyol is prepared by grafting a phase-change energy storage substance-polyethylene glycol to the polyether polyol by adopting phosphorus oxychloride as a coupling agent, and the phase-change energy storage substance can be completely reacted to the polyether polyol through a bonding mode. The anti-flaming phase-change energy storage, heat preservation and heat insulation material prepared by the invention not only has heat preservation and heat insulation properties, but also has flame resistance, great support is provided for heat preservation and heat insulation security of an outer wall of a building, and an important significance in promoting advancement and development of a fireproof technology of energy-saving engineering in China is obtained.
Owner:SOUTHWEST JIAOTONG UNIV
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