A kind of preparation method of graphene-polypropylene carbonate green composite material
A polypropylene carbonate and composite material technology, which is applied in the field of composite film preparation, can solve the problems of poor solvent resistance, oxygen barrier, thermal stability, poor mechanical wear resistance, and low glass transition temperature, and achieves easy operation. , good solvent resistance, excellent biodegradability effect
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[0017] Example 1: A preparation method of graphene-polypropylene carbonate green composite material, specifically:
[0018] Weighing of raw materials: 1 part of graphene, 60 parts of polypropylene carbonate, and 70 parts of polyvinyl alcohol are weighed by weight.
[0019] Preparation method: graphene surface pretreatment; high-speed mixing treatment of graphene and sodium dodecylbenzene sulfonate, high-speed mixing of the processed graphene mixture with silane coupling agent KH560 for secondary surface treatment; Graphene, polypropylene carbonate and polyvinyl alcohol are uniformly mixed at high speed in a high-speed mixing hopper; the mixed materials are put into a twin-screw extruder with a preset temperature of 130°C and a screw speed of 150r / min for vacuum extrusion The composite material is obtained by cutting pellets.
Example Embodiment
[0020] Embodiment 2: A preparation method of graphene-polypropylene carbonate green composite material, specifically:
[0021] Weighing of raw materials: 6 parts by weight of graphene, 90 parts of polypropylene carbonate, and 80 parts of polyvinyl alcohol.
[0022] Preparation method: graphene surface pretreatment; high-speed mixing treatment of graphene and sodium dodecylbenzene sulfonate, high-speed mixing of the processed graphene mixture with silane coupling agent KH560 for secondary surface treatment; Graphene, polypropylene carbonate and polyvinyl alcohol are uniformly mixed at high speed in a high-speed mixing hopper; the mixed materials are put into a twin-screw extruder with a preset temperature of 170°C and a screw speed of 250r / min for vacuum extrusion The composite material is obtained by cutting pellets.
Example Embodiment
[0023] Embodiment 3: A preparation method of graphene-polypropylene carbonate green composite material, specifically:
[0024] Weighing of raw materials: 3 parts by weight of graphene, 75 parts of polypropylene carbonate, and 75 parts of polyvinyl alcohol.
[0025] Preparation method: graphene surface pretreatment; high-speed mixing treatment of graphene and sodium dodecylbenzene sulfonate, high-speed mixing of the processed graphene mixture with silane coupling agent KH560 for secondary surface treatment; Graphene, polypropylene carbonate and polyvinyl alcohol are uniformly mixed at high speed in a high-speed mixing hopper; the mixed materials are put into a twin-screw extruder with a preset temperature of 155°C and a screw speed of 200r / min for vacuum extrusion The composite material is obtained by cutting pellets.
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