The invention discloses a preparation method of a
macromolecule piezoelectric material, and belongs to the technical field of an electric material. The preparation method comprises the steps that firstly,
biogas and bamboo splits are mixed and fermented, so that
fiber is activated; then,
steam explosion treatment is performed, so that the bamboo
fiber is subjected to
fiber separation; primary degradation is performed; after freezing,
ice crystals are generated inside the fiber; the
ice crystals crack under the
grinding pressure, so that the bamboo fiber is refined; then, the fiber and
phosphoric acid are subjected to mixed ball milling to prepare
cellulose whiskers; the polyhydroxy characteristics of the
cellulose whiskers are used for adsorbing precipitates; through
calcination, the fiber is carbonized, and magnetic ferroferric
oxide is adsorbed; finally, obtained black
powder and
polyvinylidene fluoride particles are mixed and are subjected to ball milling; after
hot pressing sheet forming, polarization treatment is performed to obtain the
macromolecule piezoelectric material. The preparation method has the advantages that the strength of a material film is enhanced by the carbonized fiber; the magnetic ferroferric
oxide adsorbed by the fiber can be uniformly dispersed in a thin film; the
repeatability of the film is improved, so that the structure is controllable; the service life is greatly prolonged; wide market prospects are realized.