納米(mǐ)碳對環氧樹脂固(gù)化的影響
3.2.1剪切(qiē)混合(hé)攪拌
使(shǐ)用DISPERMAT®CNF2型(xíng)號的剪切混合(hé)攪(jiǎo)拌機(jī)將碳納米(mǐ)顆粒分散在液(yè)體環(huán)氧(yǎng)體(tǐ)係中。 緊湊(còu)型(xíng)驅(qū)動(dòng)單元包含三(sān)相電機和單獨(dú)驅(qū)動的(dí)低(dī)噪(zào)音通風。中央(yāng)夾緊係統 - 安(ān)全裝置(zhì)的一(yī)部(bù)分 - 提供(gōng)了一種(zhǒng)安全且簡(jiǎn)單的(dí)方法(fǎ)，可將分散容器(qì)牢固地固(gù)定到(dào)位(wèi)。容器放置(zhì)在夾臂之間的(dí)實驗室工(gōng)作台上，並在(zài)臂被擰(níng)緊(jǐn)時自(zì)動置(zhì)中。控(kòng)製麵(miàn)板(bǎn)有(yǒu)一個(gè)數字顯(xiǎn)示屏，允(yǔn)許操(cāo)作(zuò)員在速度(dù)，扭(niǔ)矩(jǔ)或時間(jiān)值之間(jiān)自由切換。安(ān)全設(shè)備功能也顯示在(zài)數(shù)字顯示(shì)屏(píng)上(shàng)(參(cān)見(jiàn)圖(tú)3.4)。
圖3.4：用於分散的DISPERMAT®CNF2高剪切(qiē)混合器(qì)
Hyperion多壁碳(tàn)納米(mǐ)管(guǎn)和(hé)炭黑顆粒(lì)
剪(jiǎn)切(qiē)混合(hé)攪拌(bàn)過程取決於剪切螺旋槳距液體表麵的距(jù)離(lí)。螺旋槳通常放(fàng)置(zhì)在(zài)距(jù)離漿料底部(bù)的(dí)填充(chōng)樹脂總高(gāo)度的(dí)近(jìn)2/3處。該(gāi)規(guī)範允(yǔn)許(xǔ)碳納米(mǐ)顆粒在環(huán)氧係(xì)統中更好地(dì)混合和(hé)均匀分(fēn)布。通過(guò)在(zài)樹脂(zhī)中引(yǐn)入(rù)碳納米顆(kē)粒，然(rán)後(hòu)添(tiān)加固化劑(jì)來(lái)進行(háng)混合攪(jiǎo)拌(bàn)過(guò)程。 高剪切混合器用於將Hyperion多壁(bì)碳納(nà)米(mǐ)管和炭黑(hēi)顆(kē)粒摻入(rù)MY 750 / HY 5922樹脂體(tǐ)係中(zhōng)。
3.2.1剪切混合攪(jiǎo)拌
使用DISPERMAT®CNF2型(xíng)號(hào)的(dí)剪切混(hùn)合(hé)攪(jiǎo)拌機(jī)將碳(tàn)納(nà)米顆(kē)粒(lì)分(fēn)散(sàn)在(zài)液(yè)體(tǐ)環氧體係(xì)中。 緊湊型驅動單元包含(hán)三相電(diàn)機和(hé)單獨驅動(dòng)的(dí)低(dī)噪音(yīn)通(tōng)風(fēng)。中(zhōng)央(yāng)夾緊係統 - 安全裝置(zhì)的(dí)一部(bù)分 - 提供(gōng)了一種(zhǒng)安(ān)全且簡單的方(fāng)法(fǎ)，可(kě)將(jiāng)分散(sàn)容器牢固地(dì)固定到位。容器放(fàng)置在夾臂之間的實(shí)驗室(shì)工作台上，並在(zài)臂被擰緊(jǐn)時(shí)自(zì)動置中(zhōng)。控製麵板(bǎn)有(yǒu)一(yī)個數(shù)字顯示(shì)屏(píng)，允許(xǔ)操作(zuò)員在速(sù)度(dù)，扭矩(jǔ)或時間(jiān)值之間自(zì)由(yóu)切換。安(ān)全設備功能(néng)也(yě)顯示在(zài)數字(zì)顯示屏(píng)上(shàng)(參(cān)見圖3.4)。
圖3.4：用於(yú)分(fēn)散(sàn)的(dí)DISPERMAT®CNF2高(gāo)剪切(qiē)分散機(jī)
Hyperion多壁碳納米管(guǎn)和炭黑(hēi)顆粒
剪(jiǎn)切混(hùn)合攪拌(bàn)過程取決(jué)於剪切螺(luó)旋槳(jiǎng)距液體表麵(miàn)的距(jù)離(lí)。螺(luó)旋槳(jiǎng)通常放(fàng)置(zhì)在(zài)距離(lí)漿(jiāng)料底部的(dí)填充樹脂總高度(dù)的近2/3處(chǔ)。該規範(fàn)允(yǔn)許(xǔ)碳納米顆(kē)粒(lì)在環(huán)氧係(xì)統中更好(hǎo)地(dì)混(hùn)合(hé)和(hé)均(jūn)匀(yún)分布(bù)。通過在(zài)樹脂(zhī)中引入碳納(nà)米(mǐ)顆粒，然後添(tiān)加固化(huà)劑(jì)來(lái)進(jìn)行混(hùn)合攪(jiǎo)拌過程。 高(gāo)剪切混(hùn)合(hé)器(qì)用於將(jiāng)Hyperion多(duō)壁(bì)碳納(nà)米管和炭黑(hēi)顆(kē)粒摻(chān)入MY 750 / HY 5922樹脂體係中(zhōng)。
Effect of carbon nanoparticle addition on epoxy cure
3.2.1 Shear mixing
A DISPERMAT® CN F2 model shear mixer was used to disperse the carbon nanoparticles in the liquid epoxy system. The compact drive unit contains a three phase motor and separately driven low noise ventilation. The central clamping system – part of the safety device – offers a safe and simple way of holding the dispersion container securely in position. The container is placed on the laboratory bench between the clamping arms and is automatically centered as the arms are tightened. The control panel has a digital display which allows the operator to switch between values for speed, torque or time. The safety device functions are also indicated on the digital display (see figure 3.4).
Figure 3.4: DISPERMAT® CN F2 high shear mixer used to disperse the Hyperion multi-walled carbon nanotubes and carbon black particles
The shear mixing process depends on the distance of the shear propeller from the surface of the liquid batch. The propeller is usually placed at a distance of almost 2/3 of the total height of the filled resin from the bottom of the batch. This specification allows for a better mixing and an even distribution of the carbon nanoparticles in the epoxy system. The mixing process takes place with the incorporation of carbon nanoparticles in the resin, and then the addition of the curing agent. The high shear mixer was utilised for the incorporation of Hyperion multiwalled carbon nanotubes and carbon black particles into the MY 750 / HY 5922 resin system.
