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Piezoelectric nano composite material and preparation method thereof

A nano-composite material and composite material technology, which are applied in the field of piezoelectric nano-composite materials and their preparation, can solve the problems of increasing patient trauma and pain, unfavorable observation of injured parts, and no developing tracer, etc. MRI and X-Ray dual imaging effect, MRI imaging tracer function enhancement effect

Active Publication Date: 2020-02-14
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, although the above-mentioned composite material combines the advantages of the two materials, it still has certain defects: it does not degrade, and after being implanted into the body, a second operation is required for the patient, which increases the trauma and pain of the patient; it does not have visual tracer function, which is not conducive to the observation of the injury site after operation

Method used

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  • Piezoelectric nano composite material and preparation method thereof
  • Piezoelectric nano composite material and preparation method thereof
  • Piezoelectric nano composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] 1.1 Sample preparation

[0079] (1) Preparation of piezoelectric composite materials

[0080] S1, weigh Ti(OC 4 h 9 ) 4 Place in a beaker, add absolute ethanol, and mix thoroughly on a magnetic stirrer to obtain Ti(OC 4 h 9 ) 4 solution (wherein, Ti(OC 4 h 9 ) 4 The volume fraction is 50%); then add ammonia water-deionized water mixture dropwise (ammonia water: volume ratio of deionized water=1:5), add dropwise while stirring, Ti(OC 4 h 9 ) 4 The volume ratio of the solution to the ammonia-water mixture is 1:1, Ti(OC 4 h 9 ) 4 Hydrolysis occurs to form a white sol.

[0081] S2. Place the sol obtained in step S1 on a constant temperature heating magnetic stirrer, set the temperature at 90°C, and slowly add Gd(NO 3 ) 3 ·6H 2 O solution (5% mass fraction) and Ba(OH) 2 ·8H 2 O solution (mass fraction is 50%), fully stirred and mixed evenly under normal pressure to obtain a mixed solution.

[0082] Among them, Ba(OH) 2 ·8H 2 O input according to the sto...

Embodiment 2

[0113] According to the preparation process of the piezoelectric composite material in Example 1, the difference is that the Gd(NO 3 ) 3 ·6H 2 O addition ratio, the product 0.8Gd-BTO / PLGA was obtained.

[0114] Test the piezoelectric properties of the product obtained according to the test method in Example 1, and compare with the piezoelectric properties of the product in Example 1, the results are shown in Table 2.

[0115] Table 2 Test results of piezoelectric properties

[0116] PLGA BTO / PLGA 0.025Gd-BTO / PLGA 0.8Gd-BTO / PLGA Piezoelectric constant D33, pC N -1

[0117] It can be seen from the test results in Table 2 that Gd 3+ When the doping amount is high, the piezoelectric properties of the material will be reduced.

Embodiment 3

[0119] Gd-BTO nanoparticles were prepared according to the preparation process of Example 1, except that in step S3, the reaction time was 72 h.

[0120] Gained nanoparticles are tested and calculated for unit cell parameters and compared with the nanoparticles of Example 1, the results are shown in Table 3.

[0121] Table 3 Calculation results of unit cell parameters

[0122] Time(h) a / nm c / nm c / a △2θ(o) Example 3 72 4.0126 4.0217 1.0023 0.173 Example 1 120 4.0056 4.0232 1.0044 0.287

[0123] It can be seen from the calculation results in Table 3 that with the prolongation of the reaction time, the c / a value and the Δ2θ value all increase, which proves that the tetragonal phase content in the product increases with the prolongation of the reaction time.

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Abstract

The invention provides a piezoelectric nano composite material and a preparation method thereof. The piezoelectric nano composite material comprises Gd-doped barium titanate nano particles and a PLGAbase material, wherein the Gd-doped barium titanate nano particles are uniformly dispersed in the PLGA base material, for the Gd-doped barium titanate nano particles, Gd ions enter barium titanate inan ion doping mode, replace the position of positive ions in BTO and enter a tetragonal phase structure of BTO, a certain influence is caused to a tetragonal phase structure of barium titanate, and thereby piezoelectric property of a composite material is improved, surface charges of the piezoelectric material can be improved, moreover, due to doping of the Gd ions, the magnetism of the nano particles is converted from diamagnetism to paramagnetism, the density of the nano particles is increased, the material is endowed with a developing and tracing function, and the MRI and X-Ray double-developing effect is achieved.

Description

technical field [0001] The invention relates to the field of biomaterials, in particular to a piezoelectric nanocomposite material and a preparation method thereof. Background technique [0002] Since the French physicists P. Curie and J. Curie brothers discovered the piezoelectric effect in quartz crystals in 1880, people began to conduct a lot of research on piezoelectric materials. Piezoelectric materials are a type of special material that can convert mechanical energy and electrical energy into each other. Specifically, it is a type of material that generates voltage on both ends of the material when it is subjected to pressure. It is widely used in our production and life. Such as piezoelectric sonar, ultrasonic transducers, medical diagnostic sensors, ultrasonic motors and film capacitors, etc. The piezoelectric material most closely related to us is bone. Bone resorption and reconstruction after stress or injury are closely related to its piezoelectricity. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/18H01L41/187H01L41/193H01L41/257H01L41/37H10N30/85H10N30/045H10N30/092H10N30/853H10N30/857
CPCH10N30/852H10N30/8536H10N30/045H10N30/857H10N30/092
Inventor 章培标王鹏郭敏王宗良
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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