WO2021092715A1 - 一种新型电磁屏蔽复合膜及其制备方法 - Google Patents

一种新型电磁屏蔽复合膜及其制备方法 Download PDF

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WO2021092715A1
WO2021092715A1 PCT/CN2019/116964 CN2019116964W WO2021092715A1 WO 2021092715 A1 WO2021092715 A1 WO 2021092715A1 CN 2019116964 W CN2019116964 W CN 2019116964W WO 2021092715 A1 WO2021092715 A1 WO 2021092715A1
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electromagnetic shielding
composite film
shielding composite
coupling agent
carbon nanotubes
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PCT/CN2019/116964
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English (en)
French (fr)
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杨飞
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常德鑫睿新材料有限公司
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Priority to PCT/CN2019/116964 priority Critical patent/WO2021092715A1/zh
Publication of WO2021092715A1 publication Critical patent/WO2021092715A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/08—Metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/06—Elements
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/04—Ingredients treated with organic substances
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins

Definitions

  • the invention relates to the technical field of electromagnetic shielding, in particular to a novel electromagnetic shielding composite film and a preparation method thereof.
  • Electromagnetic shielding is the main technology to suppress electromagnetic interference.
  • the competition in the shielding material market is becoming increasingly fierce.
  • shielding composite materials have received increasing attention from researchers.
  • Many countries have invested a lot of manpower and material resources to conduct in-depth research on electromagnetic shielding materials.
  • the technical problem to be solved by the present invention is to provide a new type of electromagnetic shielding composite film, which has better shielding effectiveness at low frequencies and expands the application range of electromagnetic shielding materials.
  • a new type of electromagnetic shielding composite film using epoxy resin, iron fiber, carbon nanotubes, and coupling agent as raw materials, the weight percentage of each component is as follows:
  • Coupling agent 8-10%.
  • the thickness of the novel electromagnetic shielding composite film is 20-30 ⁇ m.
  • the aspect ratio of the carbon nanotubes is 150-200:1.
  • the length-to-diameter ratio of the iron fiber is 100-120:1.
  • the coupling agent is a silane coupling agent.
  • the present invention also provides a method for preparing a novel electromagnetic shielding composite film, which includes the following steps:
  • Step S1 Disperse iron fibers and carbon nanotubes in a solvent with ultrasonic for 60-120 minutes;
  • Step S2 the dispersed iron fibers and carbon nanotubes are fully mixed with the melted epoxy resin and coupling agent
  • Step S3 ultrasonic vibration for 60-120min, and then vacuumize under the condition of 10 -2 -10 -3 Pa;
  • Step S4 curing at 80-110°C for 24-48h.
  • the electromagnetic shielding composite conductive film of the present invention uses epoxy resin as a base material, filled with a certain amount of iron fibers and carbon nanotubes to form a conductive grid, has good shielding effectiveness, and has good damping and flame retardant properties .
  • its shielding effectiveness reaches 80dB, which expands the application range of electromagnetic shielding materials.
  • the thickness of the novel electromagnetic shielding composite film is 20 ⁇ m; the aspect ratio of carbon nanotubes is 150:1; the aspect ratio of iron fibers is 120:1; the coupling agent is a silane coupling agent.
  • Step S1 Disperse iron fibers and carbon nanotubes in a solvent with ultrasonic for 60-120 minutes;
  • Step S2 the dispersed iron fibers and carbon nanotubes are fully mixed with the melted epoxy resin and coupling agent
  • Step S3 ultrasonic vibration for 60-120min, and then vacuumize under the condition of 10 -2 -10 -3 Pa;
  • Step S4 curing at 80-110°C for 24-48h.
  • the novel electromagnetic shielding composite film prepared in this embodiment has a shielding performance of 70 dB for electromagnetic waves in the frequency range of 1-100 MHz.
  • Epoxy resin is 55%, iron fiber is 35%, carbon nanotube is 1%, and coupling agent is 9%.
  • the thickness of the novel electromagnetic shielding composite film is 30 ⁇ m; the aspect ratio of carbon nanotubes is 200:1; the aspect ratio of iron fibers is 100:1; the coupling agent is a silane coupling agent.
  • the electromagnetic shielding composite conductive film prepared in this embodiment has a shielding performance of 75 dB for electromagnetic waves in the frequency range of 1-100 MHz.
  • the thickness of the novel electromagnetic shielding composite film is 25 ⁇ m; the aspect ratio of the carbon nanotubes is 180:1; the aspect ratio of the iron fiber is 110:1; the coupling agent is a silane coupling agent.
  • the electromagnetic shielding composite conductive film prepared in this embodiment has a shielding performance of 80 dB for electromagnetic waves in the frequency range of 1-100 MHz.
  • the electromagnetic shielding composite conductive film of the present invention uses epoxy resin as a base material, filled with a certain amount of iron fibers and carbon nanotubes to form a conductive grid, has good shielding effectiveness, and has good damping and flame retardant properties .
  • its shielding effectiveness reaches 80dB, which expands the application range of electromagnetic shielding materials.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

一种电磁屏蔽复合膜及其制备方法，所述电磁屏蔽膜以环氧树脂、铁纤维、纳米碳管、偶联剂为原料，各成分重量百分比如下：环氧树脂55-65％；铁纤维25-35％；纳米碳管1-2％；偶联剂：8-10％。所述电磁屏蔽复合膜在低频时具有较好的屏蔽效能，扩展了电磁屏蔽材料的应用范围。

Description

一种新型电磁屏蔽复合膜及其制备方法 技术领域
本发明涉及电磁屏蔽技术领域，特别涉及一种新型电磁屏蔽复合膜及其制备方法。
背景技术
电磁屏蔽是抑制电磁干扰的主要技术，屏蔽材料市场竞争日趋激烈，屏蔽复合材料作为一种新型屏蔽材料，日益收到研究者们的高度重视。各国均投入了大量的人力和物力对电磁屏蔽材料进行深入研究。
目前的复合材料大多侧重于高频段电磁波的屏蔽，虽然获得了较好的屏蔽效果，但应用在低频时，屏蔽效果较差，不能达到环境要求的屏蔽效能。
鉴于此，有必要提供一种低频电磁屏蔽材料解决上述技术问题。
发明内容
本发明要解决的技术问题是提供一种新型电磁屏蔽复合膜，其在低频时具有较好的屏蔽效能，扩展了电磁屏蔽材料的应用范围。
为了解决上述问题，本发明的技术方案如下：
一种新型电磁屏蔽复合膜，以环氧树脂、铁纤维、纳米碳管、偶联剂为原料，各成分重量百分比如下：
环氧树脂55-65％；
铁纤维25-35％；
纳米碳管1-2％；
偶联剂：8-10％。
进一步地，所述新型电磁屏蔽复合膜的厚度为20-30μm。
进一步地，所述纳米碳管的长径比为150-200：1。
进一步地，所述铁纤维的长径比为100-120:1。
进一步地，所述偶联剂为硅烷偶联剂。
本发明还提供一种新型电磁屏蔽复合膜的制备方法，包括如下步骤：
步骤S1，将铁纤维、纳米碳管在溶剂中用超声波分散60-120min；
步骤S2，分散后的铁纤维、纳米碳管与熔融后的环氧树脂和偶联剂充分混合；
步骤S3，超声波震荡60-120min，然后在真空度为10 -2-10 -3Pa条件下抽真空；
步骤S4，在80-110℃条件下固化24-48h。
本发明提供的新型电磁屏蔽复合膜及其制备方法，有益效果在于：
本发明的电磁屏蔽复合导电薄膜，以环氧树脂为基材，在其中填充一定量的铁纤维和纳米碳管，形成导电网格，具有良好的屏蔽效能，并具有良好的阻尼和阻燃性能。对于1-100MHz频率范围内的电磁波，其屏蔽效能达80dB，扩展了电磁屏蔽材料的应用范围。
具体实施方式
为了使本技术领域的人员更好地理解本发明实施例中的技术方案，并使本发明的上述目的、特征和优点能够更加明显易懂，下面结合附图对本发明的具体实施方式作进一步的说明。
在此需要说明的是，对于这些实施方式的说明用于帮助理解本发明，但并不构成对本发明的限定。此外，下面所描述的本发明各个实施方式中所涉及的技术特征只要彼此之间未构成冲突就可以相互结合。
实施例1
环氧树脂65％，铁纤维25％，纳米碳管2％，偶联剂8％。
本实施例中，新型电磁屏蔽复合膜的厚度为20μm；纳米碳管的长径比为150：1；铁纤维的长径比为120:1；偶联剂为硅烷偶联剂。
本实施例的电磁屏蔽复合导电薄膜的制备方法，包括如下步骤：
步骤S1，将铁纤维、纳米碳管在溶剂中用超声波分散60-120min；
步骤S2，分散后的铁纤维、纳米碳管与熔融后的环氧树脂和偶联剂充分混合；
步骤S3，超声波震荡60-120min，然后在真空度为10 -2-10 -3Pa条件下抽真空；
步骤S4，在80-110℃条件下固化24-48h。
本实施例制备得到的新型电磁屏蔽复合膜，对于1-100MHz频率范围内的电磁波，其屏蔽性能为70dB。
实施例2
环氧树脂55％，铁纤维35％，纳米碳管1％，偶联剂9％。
本实施例中，新型电磁屏蔽复合膜的厚度为30μm；纳米碳管的长径比为200：1；铁纤维的长径比为100:1；偶联剂为硅烷偶联剂。
本实施例的电磁屏蔽复合膜的制备方法参照实施例1，在此不做赘述。
本实施例制备得到的电磁屏蔽复合导电薄膜，对于1-100MHz频率范围内的电磁波，其屏蔽性能为75dB。
实施例3
环氧树脂60％，铁纤维29％，纳米碳管1％，偶联剂10％。
本实施例中，新型电磁屏蔽复合膜的厚度为25μm；纳米碳管的长径比为180：1；铁纤维的长径比为110:1；偶联剂为硅烷偶联剂。
本实施例的电磁屏蔽复合膜的制备方法参照实施例1，在此不做赘述。
本实施例制备得到的电磁屏蔽复合导电薄膜，对于1-100MHz频率范围内的电磁波，其屏蔽性能为80dB。
本发明的电磁屏蔽复合导电薄膜，以环氧树脂为基材，在其中填充一定量的铁纤维和纳米碳管，形成导电网格，具有良好的屏蔽效能，并具有良好的阻尼和阻燃性能。对于1-100MHz频率范围内的电磁波，其屏蔽效能达80dB，扩展了电磁屏蔽材料的应用范围。
本说明书中的各个实施例均采用递进的方式描述，各个实施例之间相同相似的部分互相参见即可，每个实施例重点说明的都是与其它实施例的不同之处。
以上结合附图对本发明的实施方式作出详细说明，但本发明不局限于所描述的实施方式。对本领域的技术人员而言，在不脱离本发明的原理和精神的情况下对这些实施例进行的多种变化、修改、替换和变型均仍落入在本发明的保护范围之内。

Claims (6)

  1. 一种新型电磁屏蔽复合膜，其特征在于，以环氧树脂、铁纤维、纳米碳管、偶联剂为原料，各成分重量百分比如下：
    环氧树脂55-65％；
    铁纤维25-35％；
    纳米碳管1-2％；
    偶联剂：8-10％。
  2. 根据权利要求1所述的新型电磁屏蔽复合膜，其特征在于，所述新型电磁屏蔽复合膜的厚度为20-30μm。
  3. 根据权利要求1所述的新型电磁屏蔽复合膜，其特征在于，所述纳米碳管的长径比为150-200：1。
  4. 根据权利要求1所述的新型电磁屏蔽复合膜，其特征在于，所述铁纤维的长径比为100-120:1。
  5. 根据权利要求1所述的新型电磁屏蔽复合膜，其特征在于，所述偶联剂为硅烷偶联剂。
  6. 一种如权利要求1所述的新型电磁屏蔽复合膜的制备方法，其特征在于，包括如下步骤：
    步骤S1，将铁纤维、纳米碳管在溶剂中用超声波分散60-120min；
    步骤S2，分散后的铁纤维、纳米碳管与熔融后的环氧树脂和偶联剂充分混合；
    步骤S3，超声波震荡60-120min，然后在真空度为10 -2-10 -3Pa条件下抽真空；
    步骤S4，在80-110℃条件下固化24-48h。
PCT/CN2019/116964 2019-11-11 2019-11-11 一种新型电磁屏蔽复合膜及其制备方法 WO2021092715A1 (zh)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101704984A (zh) * 2009-11-18 2010-05-12 北京工商大学 聚合物基导电梯度功能材料及其制备方法
JP2012518056A (ja) * 2009-02-16 2012-08-09 サイテク・テクノロジー・コーポレーシヨン 熱硬化性複合材料の落雷および電磁妨害遮蔽用共硬化性導電性表面フィルム
CN104093787A (zh) * 2012-01-12 2014-10-08 韩华石油化学株式会社 用于电磁干扰屏蔽的包含氢化碳复合物的树脂组合物
CN105331264A (zh) * 2014-08-15 2016-02-17 中国科学院城市环境研究所 一种基于纳米碳材的复合电磁屏蔽涂料
EP3536743A1 (en) * 2016-11-02 2019-09-11 Bioneer Corporation Epoxy paste composition including silver-coated copper nanowires having core-shell structure, and conductive film including same
CN111267372A (zh) * 2020-02-18 2020-06-12 北京化工大学 一种超声辅助强制浸润制备聚合物纳米复合材料的方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012518056A (ja) * 2009-02-16 2012-08-09 サイテク・テクノロジー・コーポレーシヨン 熱硬化性複合材料の落雷および電磁妨害遮蔽用共硬化性導電性表面フィルム
CN101704984A (zh) * 2009-11-18 2010-05-12 北京工商大学 聚合物基导电梯度功能材料及其制备方法
CN104093787A (zh) * 2012-01-12 2014-10-08 韩华石油化学株式会社 用于电磁干扰屏蔽的包含氢化碳复合物的树脂组合物
CN105331264A (zh) * 2014-08-15 2016-02-17 中国科学院城市环境研究所 一种基于纳米碳材的复合电磁屏蔽涂料
EP3536743A1 (en) * 2016-11-02 2019-09-11 Bioneer Corporation Epoxy paste composition including silver-coated copper nanowires having core-shell structure, and conductive film including same
CN111267372A (zh) * 2020-02-18 2020-06-12 北京化工大学 一种超声辅助强制浸润制备聚合物纳米复合材料的方法

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