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US 12,742,038 B2Granted
Piezoelectric polylactic acid material and preparation method and application thereof
AssigneeNingbo Michi Technology Co., Ltd.
InventorsHongwei Bai, Shihao Deng, Qiang Fu, Zeshuang Qiao, Qin Zhang, Ke Wang
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Abstract
A piezoelectric polylactic acid material has a layered stacking structure, and a porous structure is formed between stacked layers. The piezoelectric polylactic acid material has a piezoelectric constant of 5.2-35.3 pC/N, has the ability to efficiently catalyze dye/pigment degradation, and can be used in the fields of dye/pigment degradation and tooth whitening. A preparation method for the piezoelectric polylactic acid composite material is also provided.
Claims13
A piezoelectric polylactic acid material, having a porous structure comprising stacked layers,
- wherein the piezoelectric polylactic acid material is prepared by a method comprising the steps of:
- subjecting a mixture comprising poly(L-lactic acid), poly(D-lactic acid), and a pore-forming agent to melting and blending at 170-220° C. to obtain a blend;
- and
- removing the pore-forming agent from the blend to obtain the piezoelectric polylactic acid material, the pore-forming agent being compatible with the polylactic acid,
- wherein the mixture further comprises 0.1-0.6 part by weight of a compatibilizer, and the compatibilizer is an amphiphilic compound.
2 more elements
Dependencies are inferred from the claim text.