Preparation method of light graphene nylon composite
A technology of nylon composite materials and graphene, which is applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problem of light weight not involved, foaming difficult to control mechanical properties, and hindering the research and development and production of lightweight graphene nylon composite materials and other problems, to achieve the effect of easy operation, improved thermal conductivity, and simple steps
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[0042] The preparation method of the lightweight graphene nylon composite material of the present invention is prepared by foaming and casting nylon, graphene, wear-resistant agent, thermally conductive filler, lubricating dispersant and additives, wherein the additives are toughening agent 1, The flame retardant is mixed in proportion, and the foamed cast nylon is prepared by the reaction of amide monomer, catalyst, cocatalyst, foaming agent and toughening agent; the preparation method of the light graphene nylon composite material comprises the following steps :
[0043] S1. Put the amide monomer into the reaction kettles A and B of the casting nylon equipment respectively at a mass ratio of 1:1, respectively evacuate to 0.1MPa, dehydrate at 120°C for 30min, stop vacuuming, and pass in nitrogen protection Add catalyst to reaction kettle A, maintain the melt temperature in the reaction kettle at 120°C, and vacuumize for 30 minutes to obtain active material A; at the same time...
Embodiment 1
[0060] The lightweight graphene nylon composite material of the present embodiment is made of foaming cast nylon, graphene, anti-wear agent (zinc oxide), thermally conductive filler (copper powder), lubricating dispersant (pentaerythritol stearate) and additive, wherein , the additive is a toughening agent one (epoxy resin), a flame retardant (pentabromobenzyl bromide) mixed in proportion, and the mass fractions of each component are as follows, as shown in Table 1.
[0061] The mass fraction of the foamed cast nylon is as follows, and it is prepared by reacting amide monomer: 70%, catalyst: 3%, co-catalyst: 10%, foaming agent: 10%, and toughening agent II: 7%. The amide monomer is a mixture of caprolactam and laurolactam at a mass ratio of 2:1, the catalyst is sodium caprolactam salt, the cocatalyst is MDI, the foaming agent is sodium carbonate, and the toughening agent is epoxy resin. The preparation method of lightweight graphene nylon composite material of the present inve...
Embodiment 2
[0066] The lightweight graphene nylon composite material of the present embodiment is made of foaming cast nylon, graphene, anti-wear agent (nano aluminum oxide), thermally conductive filler (aluminum powder), lubricating dispersant (stearic acid) and additives, Among them, the additive is a toughening agent 1 (epoxy resin) and a flame retardant (antimony trioxide) mixed in proportion, and the mass fractions of each component are as follows, as shown in Table 1.
[0067] The mass fraction of foamed cast nylon is as follows, and it is prepared by reacting amide monomer: 80%, catalyst: 1%, co-catalyst: 9%, foaming agent: 6%, toughening agent 2: 4%. The amide monomer is a mixture of caprolactam and laurolactam at a mass ratio of 2:1, the catalyst is caprolactam magnesium bromide, the cocatalyst is HDI, the foaming agent is sodium nitrite, and the toughening agent is epoxy resin.
[0068] The preparation method of the lightweight graphene nylon composite material of the present em...
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