二氧化锰纳米棒掺杂纤维素复合膜用于压电纳米发电机OA北大核心CSTPCD

Cellulose is the most abundant natural polymer resource on the earth.It has the advantages of renewable,low cost,and good biocompatibility.At the same time,cellulose has many dipoles and strong electron donating ability due to its high crystallinity and rich polar hydroxyl group.It has the good piezoelectric effect and can be used as raw material of green electronic products.In this paper,manganese dioxide nanorods(MnO2)with high purity,small particle size and good dispersion were prepared by a hydrothermal method,which doped into type Ⅰ cellulose to prepare a MnO2/cellulose composite film.The effects of different contents of MnO2 on the current output performance of the MnO2/cellulose composite film piezoelectric nanogenerator were investigated.With the increase of manganese dioxide content,the output current shows a trend of first increasing and then decreasing.When the doping quality of MnO2 is 30％,the maximum thermal weight loss rate of the composite film is 325 ℃,which is 44 ℃ higher than that of pure cellulose.The O1s binding energy values of the composite film were different from pure cellulose and manganese dioxide,which proves the existence of chemical bonding between cellulose and manganese dioxide.The piezoelectric nanogenerator with microampere-level current was fabricated by using the MnO2/cellulose composite film.The maximum output current is 80.75 μA,and the output voltage is 1.10 V.With the press of finger,the piezoelectric nanogenerator can drive a variety of electronic products such as light-emitting diode(LED)lights,calculators and electronic watches.This new type of green piezoelectric nanogenerator is based on cellulose,and MnO2 doping also improves the energy collection efficiency,which provides a new idea for promoting the development of nanogenerator technology.