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Amphiphilic modified nano lamellar molybdenum-selenide-based auxiliary agent used for carbon fiber sizing agent

A technology of molybdenum diselenide and nano-sheets, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, etc., can solve problems such as difficulty in uniform dispersion, small size of inorganic particles, and influence of sizing agent performance, and achieve simple process and excellent mechanical properties Improve and optimize the effect of interface performance and macro performance

Inactive Publication Date: 2016-08-17
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using inorganic nano-SiO 2 As a sizing resin modification material, it is prepared into a carbon fiber functional emulsion sizing agent, but due to the small size of the inorganic particles, there are certain difficulties in uniform dispersion, so nano-SiO 2 The effect of the dosage on the performance of the sizing agent needs to be further studied

Method used

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  • Amphiphilic modified nano lamellar molybdenum-selenide-based auxiliary agent used for carbon fiber sizing agent
  • Amphiphilic modified nano lamellar molybdenum-selenide-based auxiliary agent used for carbon fiber sizing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Prepare a mixed solution of water and isopropanol, wherein the volume ratio of isopropanol is 40%. Add molybdenum diselenide with an average crystallite size of 100 microns, the concentration of molybdenum diselenide is 10mg / mL, and the total amount of dispersion after mixing is 100g;

[0047] (2) Ultrasound the above dispersion liquid with an ultrasonic power of 150W and an ultrasonic time of 4 hours, and let it stand for 8 hours after the ultrasonic is completed;

[0048] (3) Centrifuge at 4000 rpm to obtain the upper dispersion;

[0049] (4) Add 5 g of acrylamide, 5 g of styrene and 0.1 g of ammonium persulfate to the above dispersion at 70°C, and react for 8 hours to obtain polyacrylamide-polystyrene block copolymer modified amphiphilic nanosheets. Molybdenum Selenide dispersion;

[0050] (5) At 70℃, combine the above-mentioned modified nanosheet molybdenum diselenide dispersion with 30 grams of dispersant Solulan 16, and the viscosity is 5mm 2 / s of methyl silicone oi...

Embodiment 2

[0052] (1) Prepare a mixed solution of water and isopropanol, where the volume ratio of isopropanol is 50%. Add molybdenum diselenide with an average crystallite size of 70 microns, the concentration of molybdenum diselenide is 10 mg / mL, and the total amount of dispersion after mixing is 100 g;

[0053] (2) Ultrasound the above dispersion liquid with an ultrasonic power of 100W and an ultrasonic time of 2 hours. After the ultrasonic is completed, let it stand for 6 hours;

[0054] (3) Centrifuge at 6000 rpm to obtain the upper dispersion;

[0055] (4) Add 10 g of acrylamide, 5 g of styrene and 0.15 g of ammonium persulfate to the above dispersion at 80°C, and react for 24 hours to obtain polyacrylamide-polystyrene block copolymer modified amphiphilic nanosheets. Molybdenum Selenide dispersion;

[0056] (5) At 60 ℃, the above-mentioned nano-sheet-layer molybdenum diselenide dispersion liquid and 30 grams of dispersant Solulan 25, 840 grams of viscosity are 20mm 2 / s of methyl silicone...

Embodiment 3

[0058] (1) Prepare a mixed solution of water and isopropanol, where the volume ratio of isopropanol is 60%, add molybdenum diselenide with an average crystallite size of 50 microns, and the concentration of molybdenum diselenide is 10 mg / mL. After mixing The total amount of dispersion is 100 grams;

[0059] (2) Ultrasound the above dispersion liquid, the ultrasonic power is 100W, the ultrasonic time is 2 hours, and the ultrasonic is left to stand for 8 hours;

[0060] (3) Centrifuge at 5000rpm to obtain the upper dispersion;

[0061] (4) Add 5 g of acrylamide, 15 g of styrene and 0.15 g of ammonium persulfate to the above dispersion at 40°C, and react for 48 hours to obtain polyacrylamide-polystyrene block copolymer modified amphiphilic nanosheets. Molybdenum Selenide dispersion;

[0062] (5) At 80 ℃, the above-mentioned nano-sheet-layer molybdenum diselenide dispersion liquid and 40 grams of dispersant Solulan 5, 840 grams of viscosity are 50mm 2 / s of methyl silicone oil and 20 g o...

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Abstract

The invention relates to an amphiphilic modified nano lamellar molybdenum-selenide-based auxiliary agent used for a carbon fiber sizing agent. The amphiphilic modified nano lamellar molybdenum-selenide-based auxiliary agent comprises a polyacrylamide-polystyrene block copolymer modified amphiphilic modified nano lamellar molybdenum selenide dispersion solution, a dispersant, silicone oil and high-grade fatty acid. The auxiliary agent comprises the following components based on 100 parts: 2-32 parts of the molybdenum selenide dispersion solution, 1-5 parts of the dispersant, 60-90 parts of the silicone oil and 1-3 parts of high-grade fatty acid. The molybdenum selenide dispersion solution is formed by adding acrylamide, styrene and ammonium persulfate into an upper-layer water solution containing isopropyl alcohol and molybdenum selenide by reacting, wherein the size of molybdenum selenide is smaller than 200 microns. The method has a simple and reliable process and the prepared auxiliary agent can be used for the fiber sizing agent with the special purpose; and the auxiliary agent has very good protection effect in a preparation process of carbon fibers, glass fibers and the like; and meanwhile, mechanical properties of a composite material can be improved.

Description

Technical field [0001] The invention belongs to the technical field of composite materials, and particularly relates to an amphiphilic modified nano-sheet molybdenum diselenide-based auxiliary agent added to a fiber sizing agent. Background technique [0002] Carbon fiber has a series of excellent properties such as high specific strength, high specific modulus, high temperature resistance, corrosion resistance, fatigue resistance, creep resistance, electrical conductivity, heat transfer and low thermal expansion coefficient, and is widely used in fiber-reinforced resin-based composite materials. However, because carbon fiber is a brittle material, in the process of production and processing, it is easy to produce wool and monofilament breakage through mechanical friction, which reduces the strength of carbon fiber. Due to the presence of hairs, the matrix resin cannot fully wet the carbon fiber, which will produce pores in the prepared composite material and affect the mechanica...

Claims

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Application Information

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IPC IPC(8): D06M15/285D06M15/233D06M11/52D06M15/643D06M13/188D06M101/40
CPCD06M11/52D06M13/188D06M15/233D06M15/285D06M15/643D06M2101/40
Inventor 叶明新沈剑锋李娜
Owner FUDAN UNIV
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