本文關(guān)鍵詞：碳纖維表面電沉積法制備羥基磷灰石涂層及玻璃纖維增強不飽和聚酯微孔塑料的研究　出處：《陜西科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 電化學(xué)沉積 羥基磷灰石 碳纖維 沉積電流 沉積電壓

【摘要】：本課題源于導(dǎo)師的陜西省自然科學(xué)基礎(chǔ)研究計劃項目“碳纖維/原位生長納米HA協(xié)同強韌HA復(fù)合材料的研究(2014JM6233)”和“玻璃纖維/微孔不飽和聚酯復(fù)合材料的研究(2010JM6004)”,是項目的一部分研究工作,具體敘述如下:碳纖維(CF)具有無蠕變,耐疲勞,熱膨脹系數(shù)小,彈性模量高,而且具有生物惰性,在人體中可以穩(wěn)定存在,無毒性,與人體的各種組織相容性好,無排異反應(yīng),在纖維的表面能誘發(fā)組織生長,作為一種理想的增強材料,已廣泛應(yīng)用于醫(yī)學(xué)、生命科學(xué)等領(lǐng)域。羥基磷灰石(HA)是人體天然骨組織中最主要的無機成分,具有優(yōu)良的生物相容性及生物活性,其弱點在于脆性較大。為了改善羥基磷灰石的這種脆性,本課題采用CF增強HA復(fù)合材料,由于CF的良好力學(xué)性能和不錯的生物相容性,這種材料有較大的研究前景和研究價值。而CF與HA陶瓷在熱膨脹系數(shù)上的存在巨大差異,為克服CF與HA陶瓷在熱膨脹系數(shù)上的巨大差異,可對CF的表面進行適當(dāng)?shù)奶幚?使纖維和基體間形成良好的界面粘結(jié)。因此,此部分研究內(nèi)容和結(jié)論如下:(1)用電化學(xué)沉積法在PAN基碳纖維(CF)表面制備了HA涂層,通過SEM(Scanning Electron Microscope)、EDS(Energy Disperse Spectroscopy)和電沉積時極化曲線等表征,研究不同電流密度、沉積時間以及供電模式等工藝參數(shù)對涂層形貌結(jié)構(gòu)的影響,探索HA的電化學(xué)沉積規(guī)律以控制HA形貌結(jié)構(gòu)。研究發(fā)現(xiàn):沉積電流和沉積電壓對涂層的相組成和形貌結(jié)構(gòu)有較大影響,在低電流密度下,涂層主要有針狀晶粒組成;在高電流密度下,由棒狀晶粒組成,增加沉積電流和沉積時間有利于改善涂層的微觀結(jié)構(gòu)和均勻性。另外,恒電流模式下制備的涂層,晶粒尺寸更小,形貌結(jié)構(gòu)更加穩(wěn)定,涂層與基體的結(jié)合情況也優(yōu)于恒電壓模式下制備的涂層。(2)微孔塑料是指泡孔均勻且孔徑小于100μm的發(fā)泡塑料,典型的微孔塑料泡孔直徑在5~50μm之間,泡孔密度達109~1012個/cm3,微孔塑料具有質(zhì)量輕、價格低、隔熱和隔音性能好、比強度高、吸收沖擊載荷等優(yōu)點。本文利用酚醛微球為造孔劑,玻璃纖維為增強相,制備了玻璃纖維增強不飽和聚酯微孔塑料(GF/MCUP)復(fù)合材料,研究不同配方對GF/MCUP材料的密度、拉伸,彎曲,沖擊等力學(xué)性能的影響,從而得到最優(yōu)配方。通過研究發(fā)現(xiàn):當(dāng)酚醛微球含量為4%,苯乙烯含量為20%,玻璃纖維含量為19.2%,固化劑含量為1.0%,促進劑含量為0.5%時,復(fù)合材料的力學(xué)性能最好。
[Abstract]:This project is based on the project of Shaanxi Provincial Natural Science basic Research Project "carbon fiber / in-situ growth of nano-HA synergistic strengthening and toughening HA composite" (2014JM6233). "and" study of glass fiber / microporous unsaturated polyester composites (2010 JM6004) ". It is a part of the research work, described as follows: CFRP has no creep, fatigue resistance, low coefficient of thermal expansion, high modulus of elasticity, and biological inertia, which can exist stably in human body. Non-toxic, good histocompatibility with human body, no rejection reaction, on the surface of the fiber can induce tissue growth, as an ideal reinforcement material, has been widely used in medicine. Hydroxyapatite (HA) is the most important inorganic component in human natural bone tissue and has excellent biocompatibility and bioactivity. In order to improve the brittleness of hydroxyapatite, CF reinforced HA composite was adopted in this paper, because of its good mechanical properties and good biocompatibility. This kind of material has great research prospect and research value. However, there is a great difference in thermal expansion coefficient between CF and HA ceramics, in order to overcome the great difference in thermal expansion coefficient between CF and HA ceramics. The surface of CF can be properly treated to form a good interfacial bond between fiber and matrix. The main contents and conclusions are as follows: (1) HA coating was prepared on the surface of PAN based carbon fiber by electrochemical deposition. Through SEM(Scanning Electron Microscope. EDS(Energy Disperse spectroscopy) and polarization curves of electrodeposition were used to study the different current density. The influence of deposition time and power supply mode on the morphology and structure of the coating. In order to control the morphology and structure of HA, it was found that the deposition current and voltage had great influence on the phase composition and morphology of the coating, and at low current density. The coating mainly consists of needle-like grains. At high current density, the coating is composed of rod-like grains, and the increase of deposition current and deposition time is beneficial to improve the microstructure and uniformity of the coating. In addition, the grain size of the coating prepared under the constant current mode is smaller than that of the coating prepared in the constant-current mode. The morphology and structure of the coating are more stable, and the bonding between the coating and the substrate is better than that of the coating prepared under the constant voltage mode. The microporous plastics refer to the foamed plastics with uniform foam pores and pore size less than 100 渭 m. Typical microcellular plastics have a diameter of 50 渭 m and a density of 109 ~ 1012 / cm ~ (-3). The microcellular plastics have light weight, low price, good insulation and sound insulation, and high specific strength. Using phenolic microspheres as pore-forming agent and glass fiber as reinforcing phase, glass fiber reinforced unsaturated polyester microporous plastic (GF- / MC) composite was prepared. The effects of different formulations on the density, tensile, bending, impact and other mechanical properties of GF/MCUP materials were studied, and the optimum formulation was obtained. It was found that the content of phenolic microspheres was 4%. When the content of styrene is 20%, the content of glass fiber is 19.2%, the content of curing agent is 1.0 and the content of accelerator is 0.5, the mechanical properties of the composite are the best.
【學(xué)位授予單位】：陜西科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TB306

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