| abstract |
The present invention provides a kind of polypropylene composite materials powder for selective laser sintering, including the polypropylene-maleic anhydride graft polypropylene of 100 parts by weight, the carbon nanotube of 0.1-1.0 parts by weight, the flow promortor of 0.3-1.0 parts by weight and 0.1-1.0 parts by weight antioxidant；And provide the preparation method of the composite powder, comprising the following steps: 1) polypropylene powder, maleic anhydride inoculated polypropylene powder are dissolved in organic solvent, target heating temperature is heated under stirring, continued constant temperature stirring, form polypropylene solution；2) by the polypropylene solution quenching to target quenching temperature, constant temperature is stood, and has precipitating to generate in solution；3) precipitating is separated, and washed, dried, polypropylene-maleic anhydride graft polypropylene powder is obtained；4) polypropylene-maleic anhydride graft polypropylene powder and carbon nanotube, flow promortor and antioxidant are mixed evenly. |