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Preparation method of electromagnetic shielding elastic material for sealing

A technology of electromagnetic shielding and elastic materials, which is applied in the field of preparation of electromagnetic shielding elastic materials for sealing, can solve the problems of not being able to meet the needs of thermal conductivity and electromagnetic shielding functions, difficult to recycle, and low rebound rate, etc., and achieve good low temperature flexibility , improve the strength, block the effect of continuous decomposition

Inactive Publication Date: 2018-10-16
王雪峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem mainly solved by the present invention is that when the elastic material is used in the field of sealing strips, it is not easy to recycle and the rebound rate is not high. Due to the advantages of low price and simple production process, PVC sealing materials have gradually replaced rubber sealing strips and become At present, the mainstream material used for sealing strips, and consumers' requirements for healthy life are getting higher and higher, which cannot meet people's needs for thermal conductivity and electromagnetic shielding functions, and because PVC will slowly decompose hydrogen chloride gas at high temperatures, which is harmful to the human body The defects of the invention provide a preparation method of electromagnetic shielding elastic material for sealing

Method used

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  • Preparation method of electromagnetic shielding elastic material for sealing

Examples

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Effect test

example 1

[0028] Add 80g of acrylonitrile and 90g of butadiene into a three-necked flask, add 100mL of mass fraction of 5% sodium hydroxide solution, 30g of polyvinyl alcohol, 100mL of 40% of the mass fraction of nano-graphite in the three-necked flask, Start the agitator, stir and emulsify at a speed of 80r / min for 10min, add 1g of potassium persulfate, heat up to 45°C, and keep warm for 3h to obtain nano-reinforced nitrile rubber; add 40g of acrylic acid and maleic anhydride copolymer to the Put 100mL of a beaker with a mass fraction of 30% acetone solution, heat up to 80°C, add 60g of bentonite to the beaker, cool down to room temperature to obtain a bentonite suspension, put the bentonite suspension in a high-speed centrifuge, and centrifuge at a speed of 3100r / min After 15 minutes, remove the supernatant to obtain lamellar bentonite, place the lamellar bentonite in an oven, heat up to 80°C, and dry for 3 hours to obtain modified bentonite; place nano-reinforced nitrile rubber in a d...

example 2

[0030] 85g of acrylonitrile and 100g of butadiene were added in a three-necked flask, and 110mL of a mass fraction of 5% sodium hydroxide solution, 35g of polyvinyl alcohol, and 110mL of a mass fraction of 40% were added to the three-necked flask. Start the agitator, stir and emulsify at a speed of 85r / min for 12min, add 2g of potassium persulfate, heat up to 47°C, and keep the temperature for 3.5h to obtain nano-reinforced nitrile rubber; add 42g of acrylic acid and maleic acid copolymer to the container Put 110mL of acetone solution with a mass fraction of 35% in a beaker, heat up to 82°C, add 65g of bentonite to the beaker, cool down to room temperature to obtain a bentonite suspension, put the bentonite suspension in a high-speed centrifuge at a speed of 3400r / min Centrifuge for 16 minutes, remove the supernatant to obtain sheet-layer bentonite, place the sheet-layer bentonite in an oven, heat up to 85°C, and dry for 3.5 hours to obtain modified bentonite; place nano-reinfo...

example 3

[0032] Add 90g of acrylonitrile and 110g of butadiene into a three-necked flask, add 120mL of mass fraction of 5% sodium hydroxide solution, 40g of polyvinyl alcohol, 120mL of 40% of the mass fraction of nano-graphite in the three-necked flask, Start the agitator, stir and emulsify at a speed of 90r / min for 15min, add 3g of potassium persulfate, heat up to 48°C, and keep warm for 4h to obtain nano-reinforced nitrile rubber; add 45g of acrylic acid and maleic anhydride copolymer to the In a 120mL beaker with a mass fraction of 40% acetone solution, heat up to 85°C, add 70g of bentonite to the beaker, cool down to room temperature to obtain a bentonite suspension, put the bentonite suspension in a high-speed centrifuge, and centrifuge at a speed of 3800r / min 17min, remove the supernatant to obtain lamellar bentonite, place the lamellar bentonite in an oven, heat up to 90°C, and dry for 4 hours to obtain modified bentonite; place nano-reinforced nitrile rubber in a double-roller m...

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Abstract

The invention discloses a preparation method of an electromagnetic shielding elastic material for sealing, and belongs to the technical field of elastic material preparation. In the process of copolymerization of acrylonitrile and butadiene in a nanographite sheet of the invention, due to the existence of active reaction points in a nanographite sheet layer, and the fine dispersion of nanographiteand the polar interaction of polar functional groups on a graphite sheet layer and rubber groups, strong interfacial bonding between graphite and a matrix is produced, so that an interference field forms eddy currents inside an elastic material and reflection is produced on the surface of the elastic material, to weaken the influence of the interference field on an elastic sealing material so asto achieve the shielding effect, sweet potato powder, glycerin and water are mixed and dispersed at a high speed and then extruded by an extruder to obtain a sweet potato starch material, thereby retarding continuous decomposition of polyvinyl chloride, and the prepared elastic material is filled with polylactic acid and paper fibers having strong toughness, so that the elasticity and toughness ofthe elastic material are enhanced, and the elastic material has the characteristics of easy degradation and recycling and reusability and further has broad application prospects.

Description

technical field [0001] The invention discloses a preparation method of an electromagnetic shielding elastic material for sealing, and belongs to the technical field of elastic material preparation. Background technique [0002] Elastomers refer to thermoplastic elastomers and various special saturated rubbers that cannot be vulcanized with sulfur. At present, "elastomer" has been extended to a general term for elastic polymers. With the development of science and technology, various disciplines continue to intersect, and some fields also borrow the word rubber, mainly to express the high elasticity of materials. "Metal Rubber" is a good example. In the field of damping, shock absorption and sound absorption, a certain mass of stretched and spiral metal wires are stacked, and then a homogeneous elastic porous substance is formed by a cold stamping process called "metal rubber". [0003] There are many kinds of elastic materials at present, and for sports goods materials, E...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L75/04C08L89/00C08L67/04C08L9/02C08K13/06C08K7/00C08K3/04C08K9/04C08K3/34C08K3/08C08K3/36C08J9/10
CPCC08J9/103C08J9/0061C08J9/0066C08J9/0071C08J9/009C08J9/0095C08J2203/04C08J2327/06C08J2409/02C08J2467/04C08J2475/04C08J2489/00C08K3/04C08K3/346C08K3/36C08K7/00C08K9/08C08K13/06C08K2003/085C08K2201/011
Inventor 王雪峰何伟仁陈可
Owner 王雪峰
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