CN104313869A - Preparation method for ZnO/C fibers for piezoelectric type generator - Google Patents
Preparation method for ZnO/C fibers for piezoelectric type generator Download PDFInfo
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Abstract
The invention discloses a preparation method for microporous ZnO/C nano-fibers for a piezoelectric type generator. The method comprises the following steps that (1) the wet spinning technology is adopted on a bacterial cellulose wet film to obtain bacterial cellulose nano-fibers; (3) zinc vacuum sputtering coating is carried out on the bacterial cellulose nano-fibers obtained after vacuum freeze drying; (5) the bacterial cellulose nano-fibers obtained after vacuum sputtering coating are placed into a muffle furnace and carbonized at the temperature ranging from 600 DEG C to 1500 DEG C, and therefore the microporous ZnO/C nano-fibers for the piezoelectric type generator are obtained. Piezoelectric materials have high dielectric constants, and therefore the piezoelectric materials are suitable for a piezoelectric device; in addition, due to the fact that the piezoelectric materials do not contain lead, the piezoelectric materials do not pollute the environment; the piezoelectric materials do not contain alkali metal, and therefore the piezoelectric materials has the good durability when used in the piezoelectric device.
Description
Technical field
The invention belongs to generating fibre technology field, be specifically related to a kind of preparation method of piezoelectric generator ZnO/C fiber.
Background technology
Along with the development of economic society, electricity has been a part indispensable in society.The present power status of China is city short of electricity, remote without electricity, spring and autumn paddy, summer in winter peak.Although country opens the engineering of transferring electricity from the west to the east, power loss and the high track laying expense of long distance powedr transmission then make the cost of electric power go up not down.The data display that China Electricity Council issues, within 2011, China's power consumption reaches 4.69 trillion kilowatt hours, increases by 11.7% on a year-on-year basis.Within 2010, the maximum breach of power supply and demand is 3,000 ten thousand kilowatts; During summer peak meeting, maximum breach is 2,500 ten thousand kilowatts.At present, generated energy far can not meet the demand of economic growth.
Nanometer technology, as an important new scientific and trechnolocial undertaking of 21 century, theory and practice is just experiencing development at a high speed.A large amount of novel nano-material and device are constantly developed, and show unprecedented application in the every field of biomedical, national defence and people's daily life before.But Nano-technology Development is to today, and large quantifier elimination all concentrates on exploitation high sensitivity, and high performance nano-device, almost also without any the power-supply system research about nanoscale.But the demand of nano-sensor to this power-supply system being applied to the aspect such as biology and national defence but grows with each passing day.Such as, wireless nanosystems is for real-time synchronization built-in biometric sensor and biological medicine monitoring, and biological living detection is significant.But the built-in wireless senser of any organism all needs power supply, in general, the power supply of these sensors directly or secondary source in battery.If oneself provide power supply to oneself in these sensor energy objects, thus realize device and while miniaturized, this is that scientists dreamed of always, therefore, electric energy can being converted into thus realizing being extremely important without the need to the nanometer device novel nano technology of external power supply of motion, vibration, fluid etc. being existed naturally is developed.Improve energy density and efficiency while this technology large reduction power supply size, become the microminiaturized aspect of nanosystems to produce far-reaching influence.
Conventional piezoelectric material due to chemical composition and crystal structure more complicated, be difficult to synthesize the high-quality structure with nanoscale.Therefore, high power output can only be realized by increase size and external forces, cannot realize small size and powerful combination.Zinc oxide, as a kind of novel semi-conductor piezoelectric, has fairly simple chemical composition and crystal structure.Our laboratory leads to research in a few years, synthesizes the nano structure of zinc oxide of a series of different-shape in a large number, and can control its purity, size, pattern and crystal structure preferably.This exploitation being powerful nano generator provides important material base.The diameter of nano wire is very little, and usually less than 100nm, but its length can reach several microns.Great aspect ratio makes very little active force just zinc oxide nanowire can be bent and produce electrical potential difference.Therefore, carry out continuously bendingly stretching this process under low-force as long as can realize a large amount of vertically nano wire, the nano generator with larger power output is just likely achieved.
Carbon fiber is as the reinforcing fiber of composite of new generation, with its high strength and modulus ratio, low-density, low x absorptivity, anticorrosive, resistance to ablation, antifatigue, heat shock resistance, the excellent properties such as little and self-lubricating of conductive and heat-conductive, the coefficient of expansion, forms the every field such as composite is widely used in from high-tech industries such as space flight, aviation, navigations to automobile, building, light industry with metal, resin, rubber, glass etc.High-performance carbon fibre is most important reinforcing material in high-tech composite, have very important impact to defence and military and national economy, development high-performance carbon fibre production technology to development China's Industry of Carbon Fiber and high-performance composite materials significant.
Summary of the invention
The object of the invention is to solve the technical problem existed in prior art, a kind of preparation method of piezoelectric generator ZnO/C fiber is provided.
For achieving the above object, the technical solution used in the present invention is as follows:
The preparation method of piezoelectric generator micropore ZnO/C fiber of the present invention, comprises the steps:
(1) bacterial cellulose wet-coating is dissolved in ion liquid solvent obtains cellulose spinning fluid; In spinning solution, the mass percentage of bacteria cellulose is 5-10%;
(2) wet spinning process is adopted to obtain bacteria cellulose fibre the cellulose spinning fluid prepared; (2) wet spinning process is adopted to obtain bacteria cellulose nanofiber the cellulose spinning fluid prepared; Fibre diameter is 30 ~ 80nm, and fibre length is 500nm ~ 10mm.
(3) by above bacteria cellulose fibre through liquid nitrogen submergence process, the bacteria cellulose fibre after liquid nitrogen process is put into vacuum freeze drier freeze-drying;
(4) bacteria cellulose fibre after vacuum freeze drying is carried out zinc vacuum sputtering coating,
(5) bacteria cellulose fibre through vacuum sputtering coating is positioned in horse expense stove, under the condition of 600 DEG C ~ 1500 DEG C, carries out carbonization, thus prepare piezoelectric generator micropore ZnO/C fiber.
Described ionic liquid is chlorination 1-allyl-3-methylimidazole.
Bacterial cellulose wet-coating is a kind of byproduct of food industries, and chemical purity is high, and source is wide, and price is low, has meticulous space net structure, and its fibre diameter is between 10-100 nm.The present invention take bacterial cellulose wet-coating as raw material, adopts wet spinning process to spin out bacteria cellulose fibre.This bacteria cellulose superfine fibre line prepares carbon nano-fiber after pyrolysis carbonization and graphitization.Because nanofiber intensity is high, toughness is large, flexible, antifatigue, radioresistance, and can work under intimate absolute zero to superhigh temperature, the firmness that carbon nano-fiber is excellent and piezo-electric effect.Piezoelectric of the present invention has high-k, and therefore, piezoelectric of the present invention is applicable to piezoelectric device.In addition, piezoelectric of the present invention does not affect environment, and reason is that this material does not use lead.Piezoelectric of the present invention does not use alkali metal, and therefore, time in piezoelectric device, this material is even also favourable in durability.
Detailed description of the invention
Embodiment 1
The piezoelectric generator preparation method of micropore ZnO/C fiber of the present embodiment, comprises the steps:
(1) bacterial cellulose wet-coating being dissolved in described ionic liquid is chlorination 1-allyl-3-methylimidazole.In obtain cellulose spinning fluid; In spinning solution, the mass percentage of bacteria cellulose is 5%;
(2) wet spinning process is adopted to obtain bacteria cellulose fibre the cellulose spinning fluid prepared; (2) wet spinning process is adopted to obtain bacteria cellulose nanofiber the cellulose spinning fluid prepared; Fibre diameter is 30 ~ 80nm, and fibre length is 500nm ~ 10mm.
(3) by above bacteria cellulose fibre through liquid nitrogen submergence process, the bacteria cellulose fibre after liquid nitrogen process is put into vacuum freeze drier freeze-drying;
(4) bacteria cellulose fibre after vacuum freeze drying is carried out zinc vacuum sputtering coating,
(5) bacteria cellulose fibre through vacuum sputtering coating is positioned in horse expense stove, under the condition of 600 DEG C, carries out carbonization, thus prepare piezoelectric generator micropore ZnO/C fiber.
Embodiment 2
The piezoelectric generator preparation method of micropore ZnO/C fiber of the present embodiment, comprises the steps:
(1) bacterial cellulose wet-coating being dissolved in ionic liquid is obtain cellulose spinning fluid in chlorination 1-allyl-3-methylimidazole; In spinning solution, the mass percentage of bacteria cellulose is 10%;
(2) wet spinning process is adopted to obtain bacteria cellulose fibre the cellulose spinning fluid prepared; (2) wet spinning process is adopted to obtain bacteria cellulose nanofiber the cellulose spinning fluid prepared; Fibre diameter is 30 ~ 80nm, and fibre length is 500nm ~ 10mm.
(3) by above bacteria cellulose fibre through liquid nitrogen submergence process, the bacteria cellulose fibre after liquid nitrogen process is put into vacuum freeze drier freeze-drying;
(4) bacteria cellulose fibre after vacuum freeze drying is carried out zinc vacuum sputtering coating,
(5) bacteria cellulose fibre through vacuum sputtering coating is positioned in horse expense stove, under the condition of ~ 1500 DEG C, carries out carbonization, thus prepare piezoelectric generator micropore ZnO/C fiber.
2. the preparation method of piezoelectric generator micropore ZnO/C fiber according to claim 1, is characterized in that: described ionic liquid is chlorination 1-allyl-3-methylimidazole.
Embodiment 3
The piezoelectric generator preparation method of micropore ZnO/C fiber of the present embodiment, comprises the steps:
(1) bacterial cellulose wet-coating is dissolved in ion liquid solvent obtains cellulose spinning fluid; In spinning solution, the mass percentage of bacteria cellulose is 8%;
(2) wet spinning process is adopted to obtain bacteria cellulose fibre the cellulose spinning fluid prepared; (2) wet spinning process is adopted to obtain bacteria cellulose nanofiber the cellulose spinning fluid prepared; Fibre diameter is 30 ~ 80nm, and fibre length is 500nm ~ 10mm.
(3) by above bacteria cellulose fibre through liquid nitrogen submergence process, the bacteria cellulose fibre after liquid nitrogen process is put into vacuum freeze drier freeze-drying;
(4) bacteria cellulose fibre after vacuum freeze drying is carried out zinc vacuum sputtering coating,
(5) bacteria cellulose fibre through vacuum sputtering coating is positioned in horse expense stove, under the condition of 1200 DEG C, carries out carbonization, thus prepare piezoelectric generator micropore ZnO/C fiber.
Claims (2)
1. a piezoelectric generator preparation method for micropore ZnO/C nanofiber, is characterized in that: comprise the steps:
(1) bacterial cellulose wet-coating is dissolved in ion liquid solvent obtains cellulose spinning fluid; In spinning solution, the mass percentage of bacteria cellulose is 5-10%;
(2) wet spinning process is adopted to obtain bacteria cellulose nanofiber the cellulose spinning fluid prepared; Fibre diameter is 30 ~ 80nm, and fibre length is 500nm ~ 10mm;
(3) by above bacteria cellulose nanofiber through liquid nitrogen submergence process, the bacteria cellulose nanofiber after liquid nitrogen process is put into vacuum freeze drier freeze-drying;
(4) bacteria cellulose fibre after vacuum freeze drying is carried out zinc vacuum sputtering coating,
(5) bacteria cellulose fibre through vacuum sputtering coating is positioned in horse expense stove, under the condition of 600 DEG C ~ 1500 DEG C, carries out carbonization, thus prepare piezoelectric generator micropore ZnO/C nanofiber.
2. the preparation method of piezoelectric generator micropore ZnO/C fiber according to claim 1, is characterized in that: described ionic liquid is chlorination 1-allyl-3-methylimidazole.
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| CN201410660521.XA CN104313869A (en) | 2014-11-19 | 2014-11-19 | Preparation method for ZnO/C fibers for piezoelectric type generator |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101492837A (en) * | 2009-03-03 | 2009-07-29 | 江苏盛丰登泰生物技术有限公司 | Process for producing bacteria cellulose fibre with high degree of polymerization |
| CN102899886A (en) * | 2012-10-25 | 2013-01-30 | 中原工学院 | Preparation method for bacterial cellulose based generating fiber and yarn |
| CN102912630A (en) * | 2012-10-25 | 2013-02-06 | 中原工学院 | Preparation method of bacterial cellulose-based generating fiber and yarn |
| CN103184586A (en) * | 2011-12-31 | 2013-07-03 | 中原工学院 | Preparation method of bacterial-cellulose-fiber-based nano-grade carbon fiber |
| CN103820883A (en) * | 2014-02-24 | 2014-05-28 | 钟春燕 | Preparation method of bacterial cellulose based carbon nanofibers |
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- 2014-11-19 CN CN201410660521.XA patent/CN104313869A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101492837A (en) * | 2009-03-03 | 2009-07-29 | 江苏盛丰登泰生物技术有限公司 | Process for producing bacteria cellulose fibre with high degree of polymerization |
| CN103184586A (en) * | 2011-12-31 | 2013-07-03 | 中原工学院 | Preparation method of bacterial-cellulose-fiber-based nano-grade carbon fiber |
| CN102899886A (en) * | 2012-10-25 | 2013-01-30 | 中原工学院 | Preparation method for bacterial cellulose based generating fiber and yarn |
| CN102912630A (en) * | 2012-10-25 | 2013-02-06 | 中原工学院 | Preparation method of bacterial cellulose-based generating fiber and yarn |
| CN103820883A (en) * | 2014-02-24 | 2014-05-28 | 钟春燕 | Preparation method of bacterial cellulose based carbon nanofibers |
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