期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 138, 期 6, 页码 -出版社
WILEY
DOI: 10.1002/app.49818
关键词
composites; films; structure-property relationships; surfaces and interfaces
资金
- Inner Mongolia Science & Technology Plan
- National Natural Science Foundation of China [21661025]
- Undergraduate Innovation Experimental Program of Inner Mongolia University of Technology [2018068]
- Undergraduate Training Program for Innovation and Entrepreneurship of Inner Mongolia Autonomous Region [201910128010]
The study shows that significant enhancement in piezoelectric properties of TPU blended BNT-PVDF composite films can be achieved by adjusting TPU content and improving microstructure as well as increasing interfacial contact area.
A series of ester-based thermoplastic polyurethane elastomer (TPU) and bismuth sodium titanate polycrystalline oxide (Bi0.5Na0.5TiO3, BNT) co-blended poly (vinylidene fluoride) (PVDF) composite films were prepared. Mechanical test confirms the optimum BNT blending content (25 wt%) and further reveals a linear growth of tensile elongation by increasing TPU content. Microstructure modifications including strengthened hydrogen bond and valence band edge elevation are evidenced to be highly correlated to the dielectric and piezoelectric properties. Significant enhancement (7-13 times) in face shear piezoelectric coefficient (d(36)) is achieved by adjusting the blending content of TPU. Cross-section image presents a featuring multilayer structure with improved dispersity of BNT particle under a transverse tensile force which effectively increases the interfacial contact area between BNT and polymer blends. This work reveals the significance of band structure modification and anisotropic texture construction on influencing the transfer of piezoelectric charge in TPU blended BNT-PVDF composite film.
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