Preparation method of thermal insulating material having ultralow density, ultrahigh elasticity and ultralow thermal conductivity
An ultra-low density, heat insulating material technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, and can solve the problems of high density, high thermal conductivity, and low material elasticity of heat insulating materials. To achieve the effect of stable performance, simple process and high production efficiency
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specific Embodiment approach 1
[0033] Specific Embodiment 1: In this embodiment, a method for preparing a thermal insulation material with ultra-low density, ultra-high elasticity and ultra-low thermal conductivity is realized according to the following steps:
[0034] 1. Preparation of graphene oxide: Add natural flake graphite into strong oxidizing mixed acid, stir for 10min-60min at a stirring speed of 100r / min-800r / min, then add strong oxidant permanganate in 3-10 times Potassium to prepare mixture A, and then put mixture A in a water bath at 30°C to 80°C, and stir at a constant temperature for 4h to 20h under the condition of a stirring speed of 200r / min to 800r / min, to obtain mixture B, and then put mixture B Adding into ice water, and adding hydrogen peroxide with a mass fraction of 30% to the ice water to obtain a graphite oxide suspension, carrying out suction filtration and washing of the graphite oxide suspension, centrifugal washing and drying, to obtain graphene oxide;
[0035] Wherein, the vol...
specific Embodiment approach 2
[0047] Embodiment 2: This embodiment is different from Embodiment 1 in that the volume ratio of the strong oxidizing mixed acid described in Step 1 to the mass ratio of natural flake graphite is (100mL-200mL): 1g. Other parameters are the same as in the first embodiment.
specific Embodiment approach 3
[0048] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the strong oxidizing mixed acid described in step one is composed of phosphoric acid with a mass fraction of 10% to 85% and sulfuric acid with a mass fraction of 10% to 98%. , the volume ratio of phosphoric acid with a mass fraction of 10% to 85% and sulfuric acid with a mass fraction of 10% to 98% is (3 to 10):1. Other parameters are the same as those in Embodiment 1 or 2.
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