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Preparation method of bending-resistant composite heat dissipation film and heat dissipation material
The invention provides a preparation method of a bending-resistant composite heat dissipation film; which comprises the following steps: dispersing a heat dissipation filler and an elastomer in a graphite oxide water solution, crosslinking the elastomer in a graphite oxide structure under the action of lipophilic groups and hydrophilic groups of an emulsifier, coating under the action of pressureto form a film, and carrying out heat dissipation under the action of pressure to obtain the bending-resistant composite heat dissipation film. The cross-linked bodies of the elastomer and the graphite oxide are arranged in order, and through the processes of drying, low-temperature reduction, calendering, high-temperature reduction, calendering and high-temperature reduction, the obtained bending-resistant composite heat dissipation film material not only has good heat dissipation performance, but also has excellent bending resistance. After the bending-resistant composite heat dissipation film provided by the invention is bent back and forth at 150 degrees for 250,000 times, the heat conduction coefficient can still be kept above 1100 W/mK, the physical density exceeds 2.0 g/cm3, and theelectric conductivity is greater than 8000 S/cm.
本发明提供一种的耐弯折复合散热膜的制备方法，所述方法首先将散热填充料和弹性体分散于氧化石墨水溶液中，弹性体在乳化剂的亲油基团和亲水基团作用下，交联于氧化石墨结构中，然后在压力作用下涂布成膜，在压力作用下，弹性体和氧化石墨的交联体有序排列，经过干燥、低温还原、压延、高温还原、压延、高温还原的过程，得到的耐弯折复合散热膜材不仅具有良好的散热性能，并且具有优异的耐弯折性能。本发明提供的耐弯折复合散热膜在150°来回弯折250000次之后，仍然能够保持热传导系数在1100W/mK以上，物理密度超过2.0g/cm3，导电率大于8000S/cm。
Preparation method of bending-resistant composite heat dissipation film and heat dissipation material
The invention provides a preparation method of a bending-resistant composite heat dissipation film; which comprises the following steps: dispersing a heat dissipation filler and an elastomer in a graphite oxide water solution, crosslinking the elastomer in a graphite oxide structure under the action of lipophilic groups and hydrophilic groups of an emulsifier, coating under the action of pressureto form a film, and carrying out heat dissipation under the action of pressure to obtain the bending-resistant composite heat dissipation film. The cross-linked bodies of the elastomer and the graphite oxide are arranged in order, and through the processes of drying, low-temperature reduction, calendering, high-temperature reduction, calendering and high-temperature reduction, the obtained bending-resistant composite heat dissipation film material not only has good heat dissipation performance, but also has excellent bending resistance. After the bending-resistant composite heat dissipation film provided by the invention is bent back and forth at 150 degrees for 250,000 times, the heat conduction coefficient can still be kept above 1100 W/mK, the physical density exceeds 2.0 g/cm3, and theelectric conductivity is greater than 8000 S/cm.
本发明提供一种的耐弯折复合散热膜的制备方法，所述方法首先将散热填充料和弹性体分散于氧化石墨水溶液中，弹性体在乳化剂的亲油基团和亲水基团作用下，交联于氧化石墨结构中，然后在压力作用下涂布成膜，在压力作用下，弹性体和氧化石墨的交联体有序排列，经过干燥、低温还原、压延、高温还原、压延、高温还原的过程，得到的耐弯折复合散热膜材不仅具有良好的散热性能，并且具有优异的耐弯折性能。本发明提供的耐弯折复合散热膜在150°来回弯折250000次之后，仍然能够保持热传导系数在1100W/mK以上，物理密度超过2.0g/cm3，导电率大于8000S/cm。
Preparation method of bending-resistant composite heat dissipation film and heat dissipation material
一种耐弯折复合散热膜的制备方法及散热材料
LIN YIJUN (author) / LI XIAOYAN (author) / ZHANG YUZHEN (author) / YANG XIAODONG (author)
2021-02-26
Patent
Electronic Resource
Chinese
IPC:
C09K
Materialien für Anwendungen, soweit nicht anderweitig vorgesehen
,
MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR
/
C04B
Kalk
,
LIME
/
C08J
Verarbeitung
,
WORKING-UP
/
C08K
Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe
,
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS
/
C08L
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
,
Massen auf Basis makromolekularer Verbindungen
/
H05K
PRINTED CIRCUITS
,
Gedruckte Schaltungen
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