本文關(guān)鍵詞：三維網(wǎng)狀結(jié)構(gòu)增強(qiáng)磁流變彈性體的研究　出處：《中國(guó)科學(xué)技術(shù)大學(xué)》2016年博士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 磁流變彈性體 儲(chǔ)能模量 阻尼 電阻 傳感器

【摘要】：磁流變彈性體(MRE)是將微米級(jí)的軟磁性顆粒分散到具有黏彈性的高分子聚合物中復(fù)合而成的一種智能材料,對(duì)MRE施加可變磁場(chǎng)時(shí),其力學(xué)性能隨磁場(chǎng)強(qiáng)度變化發(fā)生連續(xù)、可逆的變化,因此可以被應(yīng)用于減震、降噪、隔振等領(lǐng)域。通過對(duì)基體改性或?qū)洿判晕⒚准?jí)顆粒進(jìn)行修飾可以改善MRE的力學(xué)性能,改變模量及阻尼性能,因此目前MRE的主要研究對(duì)象是基體和顆粒分散相。作為一種新型智能復(fù)合材料,MRE結(jié)構(gòu)設(shè)計(jì)沒能引起足夠的重視。MRE的經(jīng)典結(jié)構(gòu)是軟磁性顆粒在基體內(nèi)部定向排列成鏈狀結(jié)構(gòu)。這種結(jié)構(gòu)雖然在MRE中廣泛應(yīng)用,但由于其鏈狀結(jié)構(gòu)在基體中缺乏支撐物,受到剪切作用的時(shí)候,容易被破壞。因此,為了使MRE具有理想的儲(chǔ)能模量和磁流變效應(yīng),對(duì)MRE進(jìn)行結(jié)構(gòu)設(shè)計(jì)是十分必要和有意義的。本文以設(shè)計(jì)MRE的復(fù)合材料結(jié)構(gòu)為目的,選擇了三維網(wǎng)絡(luò)骨架結(jié)構(gòu)增強(qiáng)MRE,系統(tǒng)地研究了骨架結(jié)構(gòu)對(duì)MRE性能的影響。利用松香甘油酯增強(qiáng)天然橡膠基體研究基體潤(rùn)濕性對(duì)磁流變性能的影響,選用聚氨酯海綿骨架,研究骨架對(duì)MRE內(nèi)羰基鐵粉的鏈狀結(jié)構(gòu)的限制作用,首次將碳納米管和銀納米線覆載到聚氨酯海綿骨架上,研究了MRE電阻對(duì)應(yīng)變和磁場(chǎng)的響應(yīng)。該研究工作改善了MRE的力學(xué)性能,將MRE的應(yīng)用范圍拓展到傳感器領(lǐng)域。具體內(nèi)容如下：1、將松香甘油酯添加到天然橡膠基體中來增加基體對(duì)菝基鐵粉的潤(rùn)濕性和羧基鐵粉的分散性,增強(qiáng)了天然橡膠基體MRE的力學(xué)性能。在不同磁場(chǎng)、應(yīng)變和頻率條件下,研究了基體和羰基鐵粉之間潤(rùn)濕程度對(duì)MRE力學(xué)性能的影響。與純天然橡膠基體MRE相比,松香甘油酯/天然橡膠互穿網(wǎng)狀結(jié)構(gòu)對(duì)羰基鐵粉有更好的潤(rùn)濕性能,因此能降低MRE的阻尼。松香甘油酯的添加還能增加MRE的磁致模量。本文研究了基體對(duì)羰基鐵粉的潤(rùn)濕性和羰基鐵粉的分散性對(duì)MRE力學(xué)性能的影響,對(duì)提高M(jìn)RE力學(xué)性能有一定指導(dǎo)作用。2、將多孔海綿結(jié)構(gòu)植入到磁流變塑性體中,制備出磁流變復(fù)合材料。重點(diǎn)研究三維骨架對(duì)磁流變復(fù)合材料內(nèi)部鐵粉的限制作用,發(fā)現(xiàn)三維骨架的植入能極大地提升磁致模量和磁流變效應(yīng)。將具有彈性的多孔聚氨酯海綿骨架植入到磁流變塑性體中,制備出的MRE可以反復(fù)被拉伸和彎曲。研究發(fā)現(xiàn),MRE內(nèi)部的多孔骨架結(jié)構(gòu)可以有效的分散對(duì)MRE施加的剪切力,能同時(shí)增大MRE的零場(chǎng)儲(chǔ)能模量和磁致模量。而多孔骨架的植入對(duì)MRE的阻尼性能幾乎沒有影響。該方法為增加MRE的磁致模量、提高M(jìn)RE的力學(xué)性能提供了可行性方案,對(duì)MRE在工程上的應(yīng)用方面意義重大。3、對(duì)MRE內(nèi)部三維網(wǎng)狀結(jié)構(gòu)展開了一系拓展研究。將多孔海綿骨架上分別覆載導(dǎo)電碳納米管及銀納米線,系統(tǒng)研究了交聯(lián)度、應(yīng)變和磁場(chǎng)對(duì)MRE電阻性能的影響,發(fā)現(xiàn)MRE的電阻隨應(yīng)變和磁場(chǎng)變化均能產(chǎn)生相應(yīng)變化。研究表明：柔性的碳納米管對(duì)MRE的儲(chǔ)能模量和磁致模量都有增強(qiáng)作用。覆載碳納米管后MRE的導(dǎo)電性有極大提升,其電阻隨應(yīng)變變化而連續(xù)有規(guī)律的變化。該特殊性能可以將MRE的應(yīng)用范圍拓展到應(yīng)變傳感器領(lǐng)域。而銀納米線對(duì)MRE的儲(chǔ)能模量和磁致模量都有降低作用,應(yīng)綜合考慮其力學(xué)性能和電學(xué)性能。但由于銀納米線導(dǎo)電性好,MRE的電阻變化隨應(yīng)變變化更加靈敏,且電阻能隨磁場(chǎng)變化而變化。因此研究銀納米線對(duì)MRE導(dǎo)電性影響意義重大,可以將MRE用作磁場(chǎng)傳感器。此外,本文還細(xì)致的研究了基體交聯(lián)度對(duì)MRE電阻性能的影響。上述研究拓展了MRE在傳感器領(lǐng)域的應(yīng)用,具有十分重要的意義。
[Abstract]:Magnetorheological elastomer (MRE) is the dispersion of soft magnetic particles of micron to a kind of smart material compounded with viscoelastic polymer in a variable magnetic field on MRE, the mechanical properties change with the magnetic field strength of continuous, reversible changes, so it can be applied to vibration, noise, vibration etc. through modification of the matrix or modification can improve the mechanical properties of MRE soft magnetic particles, changing the modulus and damping properties, so the main research object is MRE matrix and dispersed phase particles. As a new type of intelligent composite materials, the structural design of MRE did not cause enough attention to the classic structure of.MRE the soft magnetic particles in the matrix of aligned chain structure. This structure is widely used in the MRE, but because of its lack of support chain structure in the matrix, when subjected to shear for the That is easy to be destroyed. Therefore, in order to make MRE with ideal storage modulus and magnetorheological effect, the structure design of MRE is very necessary and meaningful. This paper aims at the structure design of the composite material MRE, the three-dimensional network skeleton structure enhanced MRE, systematic study of the influence of skeleton structure on the performance of MRE the enhancement effect of matrix. The study of natural rubber matrix wettability on magnetic rheological properties of the rosin glyceride, using polyurethane sponge skeleton, limiting chain structure of MRE in the study of carbonyl iron skeleton, the carbon nanotubes and silver nanowires coated to the polyurethane foam skeleton, the response of the strain and resistance of MRE the magnetic field. The research work to improve the mechanical properties of MRE, extending the application of MRE to the sensor field. The specific contents are as follows: 1, the rosin glyceride is added to the natural rubber matrix to increase The dispersion matrix on the basis of iron and Smilax wettability and carboxyl iron powder, to enhance the mechanical properties of natural rubber matrix MRE. Under different magnetic field, strain and frequency conditions, studied the effect of wetting degree between matrix and carbonyl iron powder on the mechanical properties of MRE. Compared with the pure natural rubber matrix MRE, rosin glycerol ester natural rubber / interpenetrating network structure has better wetting properties of carbonyl iron powder, it can reduce MRE damping. Adding rosin glycerol ester can increase the magnetic modulus of MRE. This paper studies the influence of dispersion matrix on the wettability of carbonyl iron and carbonyl iron powder on the mechanical properties of MRE,.2 has a certain guiding role to improve the mechanical properties of MRE, the porous sponge structure into magnetorheological plastic body, preparation of magnetorheological composite materials. Focusing on the function of 3D limit skeleton on Magnetorheological composite materials of iron powder, three Dimensional skeleton implantation can greatly enhance the magnetic modulus and magnetorheological effect. The elastic porous polyurethane foam skeleton into magnetorheological plastic body, the prepared MRE can be repeated stretching and bending. The study found that porous structure of MRE can effectively disperse the internal shear force applied on MRE, modulus and magnetic modulus to zero field storage while increasing MRE. And the damping properties of porous implant of MRE has almost no effect. The method to increase the magnetic modulus of MRE, provides a feasible solution to improve the mechanical properties of MRE, the application of MRE to engineering significance in.3, launched a research and development a series of MRE internal three-dimensional network structure. The porous sponge skeleton respectively with carrying conductive carbon nanotubes and silver nanowires, studied crosslinking degree and the effect of strain and magnetic field on MRE resistance performance, with resistance MRE The strain and magnetic field changes can produce corresponding changes. The study shows that the flexibility of carbon nanotubes on the storage modulus of MRE and magnetic modulus are enhancement. The load of carbon nanotubes after the conductivity of MRE has greatly improved, and the resistance strain changes with continuous rule change. The special properties can be applied the MRE is extended to the strain sensor field. And the silver nanowires on the storage modulus of MRE and magnetic modulus decreased, should be considered for the mechanical and electrical properties. But because the silver nanowires with good conductivity and resistance change of MRE strain is more sensitive, and the resistance can change with the change of magnetic field. So the study of silver nanowires is significant influence on the conductivity of MRE, MRE can be used as a magnetic field sensor. In addition, this paper also studied effect of matrix crosslinking degree on MRE resistance performance. The study extends the MRE in sensing The application of the device field is of great significance.

【學(xué)位授予單位】：中國(guó)科學(xué)技術(shù)大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2016
【分類號(hào)】：O37;TB381

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

1 ;A BRIEF REVIEW AND PROSPECT OF EXPERIMENTAL SOLID MECHANICS IN CHINA[J];Acta Mechanica Solida Sinica;2010年06期

2 潘華錦,黃紅軍,張靈振,齊建英,曹少坤;Rheological properties of magnetorheological fluid prepared by gelatincarbonyl iron composite particles[J];Journal of Central South University of Technology(English Edition);2005年04期

3 方生,龔興龍,張先舟,張培強(qiáng);磁流變彈性體力學(xué)性能的測(cè)試與分析[J];中國(guó)科學(xué)技術(shù)大學(xué)學(xué)報(bào);2004年04期

4 王修勇,陳政清,高贊明,倪一清;磁流變阻尼器對(duì)斜拉索振動(dòng)控制研究[J];工程力學(xué);2002年06期

5 何旭輝,陳政清,黃方林,王修勇,倪一清;洞庭湖大橋斜拉索減振試驗(yàn)研究[J];振動(dòng)工程學(xué)報(bào);2002年04期

6 方生,張培強(qiáng);旋轉(zhuǎn)磁場(chǎng)作用下磁流變液顆粒運(yùn)動(dòng)及結(jié)構(gòu)演化的模擬[J];化學(xué)物理學(xué)報(bào);2001年05期

7 李彩虹，張玉亮，，宋文玲，康萬利;顆粒在非牛頓液體中的沉降[J];大慶石油學(xué)院學(xué)報(bào);1995年01期

相關(guān)博士學(xué)位論文 前3條

1 廖國(guó)江;磁流變彈性體的力學(xué)性能及其在振動(dòng)控制中的應(yīng)用[D];中國(guó)科學(xué)技術(shù)大學(xué);2014年

2 范艷層;順丁橡膠基磁流變彈性體的研制及其阻尼性能研究[D];中國(guó)科學(xué)技術(shù)大學(xué);2013年

3 王銀玲;橡膠基金屬鐵粒子復(fù)合材料的制備及其作為磁流變彈性體在安全工程中應(yīng)用的研究[D];中國(guó)科學(xué)技術(shù)大學(xué);2006年

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