A Novel Carbon Nanofiber Precursor: Poly(acrylonitrile-co-vinylacetate-co-itaconic acid) Terpolymer.
A Novel Carbon Nanofiber Precursor: Poly(acrylonitrile-co-vinylacetate-co-itaconic acid) Terpolymer.
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DOI：
10.1166/jnn.2019.16309
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发表时间：
2019-07
影响因子：
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通讯作者：
Dilek Suadiye Can;H. Baskan;Selin Gumrukcu;A. Sarac
中科院分区：
文献类型：
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作者：
Dilek Suadiye Can;H. Baskan;Selin Gumrukcu;A. Sarac
本研究旨在制备作为碳纳米管前体的聚（丙烯腈-co-乙酸乙烯酯-co-衣康酸）共聚物（poly（AN-co-VAc-co-IA））。在这方面，通过自由基聚合合成了具有不同IA量的样品。将产生的纳米纤维样品电纺以获得纳米纤维，然后将其转化为碳纳米纤维。将获得的电纺纳米纤维在200-325 °C之间的不同温度下氧化。在氧化过程之后，在1100 °C下在NH3存在下应用碳化过程。用乌氏粘度计和凝胶渗透色谱法（GPC）分别测定了产物的粘度和分子量分布。通过热重分析（TGA）和差示扫描量热法（DSC）分析了三元共聚物样品的热特性。通过傅里叶变换红外衰减全反射（FTIR-ATR）对氧化纤维、氧化纤维和纳米纤维进行光谱表征。用扫描电子显微镜（SEM）对静电纺丝原丝、氧化丝和复丝丝进行了形貌观察。IA的引入对静电纺丝性能和静电纺丝纳米纤维有显著影响。此外，还证明了氧化温度是由氧化铝制备碳纳米管的关键参数。碳化过程完成后，所制得的纤维毡的形貌和颜色都发生了变化。据观察，当与聚（AN-co-VAc）和聚（AN-co-IA）共聚物相比时，聚（AN-co-VAc-co-IA）嵌段共聚物具有较低的引发温度，从而提供了更容易获得碳纳米纤维的机会，并且聚（AN-co-VAc-co-IA）嵌段共聚物可以用作碳纳米纤维生产的有效前体。
This study aimed to produce poly(acrylonitrile-co-vinylacetate-co-itaconic acid) (poly(AN-co-VAc-co-IA)) terpolymer as a carbon nanofiber precursor. In this respect, terpolymer samples with different IA amounts were synthesized by free radical polymerization. Produced terpolymer samples were electrospun in order to obtain nanofibers which were then converted to carbon nanofibers. Obtained electrospun nanofibers were oxidized at different temperatures between 200-325 °C. After the oxidation process, carbonization process was applied at 1100 °C in the presence of N₂. Viscosity and molecular weight distribution of produced samples were measured with ubbelohde viscosimeter and gel permeation chromatography (GPC), respectively. Thermal features of the ter-polymer samples were analyzed by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Spectroscopic characterization of terpolymer samples, oxidized and carbonized nanofibers were performed by Fourier transform infrared-attenuated total reflectance (FTIR-ATR). Original electrospun nanofibers, oxidized and carbonized nanofibers were investigated morphologically by scanning electron microscope (SEM). Inclusion of IA had considerable effect on terpolymer properties and electrospun nanofibers. Moreover, it was proven that oxidation temperature was a crucial parameter for carbon nanofiber production from terpolymer. Both morphology and color of the produced nanofiber mats changed when carbonization process was accomplished. It was observed that poly(AN-co-VAc-co-IA) terpolymer has lower initiation temperature when compared to poly(AN-co-VAc) and poly(AN-co-IA) copolymers, giving the opportunity to obtain carbon nanofibers easier, and poly(AN-co-VAc-co-IA) terpolymer can be used as an effective precursor for carbon nanofiber production.