鉑型離子聚合物金屬復(fù)合材料的基本電學(xué)性能研究
發(fā)布時間：2018-11-21 17:01
【摘要】：離子聚合物金屬復(fù)合材料(Ionic Polymer Metal Composite,IPMC)是一種新穎的智能材料,它既具備良好的驅(qū)動特性,也表現(xiàn)出一定的傳感能力,在醫(yī)療、仿生和MEMS應(yīng)用等方面具有廣闊的發(fā)展前景。本文針對IPMC的基本電學(xué)性能進(jìn)行理論研究和實驗驗證,主要的研究工作以及研究成果如下:基本力學(xué)性能方面:采用化學(xué)沉積法制備鉑型、銀型和添加碳納米管的IPMC試樣,確定其在常溫常壓下含水率與時間的關(guān)系;通過拉伸實驗取得各種類型IPMC的彈性模量;通過動態(tài)力學(xué)性能實驗,給出不同頻率、不同溫度的實驗條件下各型IPMC的儲存模量、損耗模量等參數(shù),確定IPMC在振動載荷下的動態(tài)模量及力學(xué)損耗與溫度的關(guān)系。同時采用EDS方法測定了各型IPMC中的電極分布情況。綜合考慮,鉑型IPMC的性能較為突出,作為重點進(jìn)行研究。基本電學(xué)性能實驗與模型研究方面:使用電化學(xué)工作站分別在去離子水和稀硫酸兩種溶液中對鉑型IPMC試樣進(jìn)行實驗,取得其電化學(xué)阻抗譜,考察電極和界面對IPMC電學(xué)參數(shù)的影響;以雙電層模型為基礎(chǔ),考慮離子遷移和擴(kuò)散兩種過程,結(jié)合電極(鉑金屬顆粒)在基體中的梯度分布形式,建立起包含表面電阻、擴(kuò)散層電容、Warburg阻抗等電路元件的電學(xué)模型。對比IPMC電學(xué)響應(yīng)實驗,結(jié)果表明其表面電阻越小,輸出電壓越高,擴(kuò)散層電容越大,響應(yīng)時間越長。電學(xué)響應(yīng)實驗與模型研究方面:采用四點彎曲梁提供IPMC彎曲所需的彎矩,考察階躍激勵和正弦激勵時的IPMC輸出電壓情況,得到IPMC靈敏系數(shù)(電壓/應(yīng)變)隨頻率變化曲線。結(jié)果表明IPMC電壓輸出具有明顯的延遲現(xiàn)象,且激勵頻率5Hz附近具有較高的靈敏系數(shù),可達(dá)0.35558mV/2000με。由大變形理論給出IPMC彎曲曲率與壓力之間的關(guān)系,基于不可逆熱力學(xué)理論建立IPMC內(nèi)壓力與輸出電壓關(guān)系,由此建立IPMC電學(xué)響應(yīng)模型,描述IPMC的彎曲曲率與兩表面間輸出電壓之間的比例關(guān)系。研究結(jié)果表明:建立的電學(xué)響應(yīng)模型能夠較理想得預(yù)測IPMC彎曲時兩表面間輸出電壓。正弦周期激勵下IPMC電荷輸出的實驗與模型研究方面:將Kirchhoff-Love板理論應(yīng)用于IPMC的機(jī)械振動。用Poisson-Nernst-Planck模型表示由于時變機(jī)械變形引起的IPMC中電荷和電勢的變化。研究了在水下激勵時IPMC的化學(xué)-力-電響應(yīng)的模型。實驗測量在正弦周期激勵時IPMC的開路電壓和短路電流,由此研究其周期激勵信號下的電荷輸出變化規(guī)律,并與理論值進(jìn)行對比。測試結(jié)果表明,選擇合適的負(fù)載導(dǎo)納時,輸出功率達(dá)到最大值。本文圍繞著IPMC的基本電學(xué)性能開展基礎(chǔ)研究方面的工作,通過理論建模和實驗手段,積累IPMC在彎曲狀態(tài)下的電學(xué)響應(yīng)研究成果,以期推動其功能器件化。本文研究工作是在國家自然科學(xué)基金項目“離子聚合物金屬復(fù)合材料的力學(xué)行為研究”(項目批準(zhǔn)號:11372132)的資助下完成的。
[Abstract]:Ionic polymer metal composite (Ionic Polymer Metal Composite,IPMC) is a novel intelligent material, which has good driving characteristics and sensing ability. It has a broad development prospect in medical treatment, biomimetic and MEMS applications. In this paper, the basic electrical properties of IPMC are studied theoretically and experimentally. The main research work and results are as follows: basic mechanical properties: platinum, silver and carbon nanotubes (CNTs) IPMC samples were prepared by chemical deposition method. The relationship between water content and time at room temperature and atmospheric pressure is determined. The elastic modulus of various types of IPMC was obtained by tensile test. Through dynamic mechanical performance experiments, the storage modulus and loss modulus of IPMC under different frequency and temperature are given, and the dynamic modulus of IPMC under vibration load and the relationship between mechanical loss and temperature are determined. At the same time, the electrode distribution in various types of IPMC was determined by EDS method. Considering synthetically, the performance of platinum type IPMC is more outstanding. Experimental and model study on basic electrical properties: platinum type IPMC samples were tested in deionized water and dilute sulfuric acid solution with electrochemical workstation, and their electrochemical impedance spectra were obtained. The effects of electrode and interface on the electrical parameters of IPMC were investigated. Based on the double layer model, considering the ion migration and diffusion processes, and combining the gradient distribution of electrode (platinum particle) in the matrix, an electrical model including surface resistance, diffusion layer capacitance, Warburg impedance and other circuit elements is established. Compared with the IPMC electrical response experiment, the results show that the smaller the surface resistance, the higher the output voltage, the larger the capacitance of diffusion layer and the longer the response time. Electrical response experiment and model study: the four-point bending beam is used to provide the bending moment required for IPMC bending. The output voltage of IPMC under step excitation and sinusoidal excitation is investigated. The curve of IPMC sensitivity coefficient (voltage / strain) varying with frequency is obtained. The results show that the IPMC voltage output has obvious delay phenomenon, and the excitation frequency near 5Hz has a high sensitivity coefficient, which can reach 0.35558mV/2000 渭 蔚. Based on the theory of large deformation, the relationship between bending curvature and pressure of IPMC is given. Based on the irreversible thermodynamics theory, the relation between internal pressure and output voltage of IPMC is established, and the electrical response model of IPMC is established. The relationship between the bending curvature of IPMC and the output voltage between the two surfaces is described. The results show that the proposed electrical response model can predict the output voltage between the two surfaces during IPMC bending. Experimental and model study of IPMC charge output under sinusoidal periodic excitation: the Kirchhoff-Love plate theory is applied to the mechanical vibration of IPMC. The Poisson-Nernst-Planck model is used to express the change of electric charge and potential in IPMC caused by time-varying mechanical deformation. The chemical-mechanical-electric response model of IPMC under underwater excitation is studied. The open circuit voltage and short circuit current of IPMC under sinusoidal periodic excitation are measured experimentally. The law of charge output under periodic excitation is studied and compared with the theoretical values. The test results show that the output power reaches the maximum when the appropriate load admittance is selected. In this paper, the basic research work on the basic electrical properties of IPMC is carried out. Through theoretical modeling and experimental means, the research results of electrical response of IPMC under bending state are accumulated in order to promote its functional device. This paper is supported by the project of National Natural Science Foundation "study on Mechanical behavior of Ionic Polymer Metal Composites" (Project Grant No. 11372132).
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2015
【分類號】：TB381
[Abstract]:Ionic polymer metal composite (Ionic Polymer Metal Composite,IPMC) is a novel intelligent material, which has good driving characteristics and sensing ability. It has a broad development prospect in medical treatment, biomimetic and MEMS applications. In this paper, the basic electrical properties of IPMC are studied theoretically and experimentally. The main research work and results are as follows: basic mechanical properties: platinum, silver and carbon nanotubes (CNTs) IPMC samples were prepared by chemical deposition method. The relationship between water content and time at room temperature and atmospheric pressure is determined. The elastic modulus of various types of IPMC was obtained by tensile test. Through dynamic mechanical performance experiments, the storage modulus and loss modulus of IPMC under different frequency and temperature are given, and the dynamic modulus of IPMC under vibration load and the relationship between mechanical loss and temperature are determined. At the same time, the electrode distribution in various types of IPMC was determined by EDS method. Considering synthetically, the performance of platinum type IPMC is more outstanding. Experimental and model study on basic electrical properties: platinum type IPMC samples were tested in deionized water and dilute sulfuric acid solution with electrochemical workstation, and their electrochemical impedance spectra were obtained. The effects of electrode and interface on the electrical parameters of IPMC were investigated. Based on the double layer model, considering the ion migration and diffusion processes, and combining the gradient distribution of electrode (platinum particle) in the matrix, an electrical model including surface resistance, diffusion layer capacitance, Warburg impedance and other circuit elements is established. Compared with the IPMC electrical response experiment, the results show that the smaller the surface resistance, the higher the output voltage, the larger the capacitance of diffusion layer and the longer the response time. Electrical response experiment and model study: the four-point bending beam is used to provide the bending moment required for IPMC bending. The output voltage of IPMC under step excitation and sinusoidal excitation is investigated. The curve of IPMC sensitivity coefficient (voltage / strain) varying with frequency is obtained. The results show that the IPMC voltage output has obvious delay phenomenon, and the excitation frequency near 5Hz has a high sensitivity coefficient, which can reach 0.35558mV/2000 渭 蔚. Based on the theory of large deformation, the relationship between bending curvature and pressure of IPMC is given. Based on the irreversible thermodynamics theory, the relation between internal pressure and output voltage of IPMC is established, and the electrical response model of IPMC is established. The relationship between the bending curvature of IPMC and the output voltage between the two surfaces is described. The results show that the proposed electrical response model can predict the output voltage between the two surfaces during IPMC bending. Experimental and model study of IPMC charge output under sinusoidal periodic excitation: the Kirchhoff-Love plate theory is applied to the mechanical vibration of IPMC. The Poisson-Nernst-Planck model is used to express the change of electric charge and potential in IPMC caused by time-varying mechanical deformation. The chemical-mechanical-electric response model of IPMC under underwater excitation is studied. The open circuit voltage and short circuit current of IPMC under sinusoidal periodic excitation are measured experimentally. The law of charge output under periodic excitation is studied and compared with the theoretical values. The test results show that the output power reaches the maximum when the appropriate load admittance is selected. In this paper, the basic research work on the basic electrical properties of IPMC is carried out. Through theoretical modeling and experimental means, the research results of electrical response of IPMC under bending state are accumulated in order to promote its functional device. This paper is supported by the project of National Natural Science Foundation "study on Mechanical behavior of Ionic Polymer Metal Composites" (Project Grant No. 11372132).
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2015
【分類號】：TB381
【相似文獻(xiàn)】
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1 徐元;張開;代模欄;孫韶渝;;三元共聚丙烯酸酯類離子聚合物性能的研究[J];成都科技大學(xué)學(xué)報;1989年04期
2 宋中健,張惠林;離子聚合物的發(fā)展及其應(yīng)用[J];玻璃鋼/復(fù)合材料;1992年05期
3 彭瀚e，
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