Accelerating the oxidative stabilization of pitch fibers and improving the physical performance of carbon fibers by modifying naphthalene-based mesophase pitch with C9 resin

Jin, Zhao; Zuo, Xiaohua; Long, Xiangyi; Cui, Zhengwei; Yuan, Guanming; Zhang, Dong; Zhang, Jiang; Cong, Ye; Li, Xuanke

doi:10.1016/j.jaap.2020.105009

Cited by 35 publications

(7 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Notably, when the WFA ratio reaches 5%, the carbon yield can reach a substantial value of up to 93%. These findings provide evidence that an appropriate amount of WFA can stimulate thermal polymerization reactions [43,44]. For applications requiring improved thermal stability of the reaction system, it is advisable to explore suitable co-carbonizing agents that facilitate the transformation of small molecules into planar molecular structures during thermal decomposition.…”

Section: Molecular Structure Analysis Of Mesophase Pitchmentioning

confidence: 83%

The Neglected Role of Asphaltene in the Synthesis of Mesophase Pitch

Wang,

Li,

Wang

et al. 2024

Molecules

View full text Add to dashboard Cite

This study investigates the synthesis of mesophase pitch using low-cost fluid catalytic cracking (FCC) slurry and waste fluid asphaltene (WFA) as raw materials through the co-carbonization method. The resulting mesophase pitch product and its formation mechanism were thoroughly analyzed. Various characterization techniques, including polarizing microscopy, softening point measurement, Fourier-transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA), were employed to characterize and analyze the properties and structure of the mesophase pitch. The experimental results demonstrate that the optimal optical texture of the mesophase product is achieved under specific reaction conditions, including a temperature of 420 °C, pressure of 1 MPa, reaction time of 6 h, and the addition of 2% asphaltene. It was observed that a small amount of asphaltene contributes to the formation of mesophase pitch spheres, facilitating the development of the mesophase. However, excessive content of asphaltene may cover the surface of the mesophase spheres, impeding the contact between them and consequently compromising the optical texture of the mesophase pitch product. Furthermore, the inclusion of asphaltene promotes polymerization reactions in the system, leading to an increase in the average molecular weight of the mesophase pitch. Notably, when the amount of asphaltene added is 2%, the mesophase pitch demonstrates the lowest ID/IG value, indicating superior molecular orientation and larger graphite-like microcrystals. Additionally, researchers found that at this asphaltene concentration, the mesophase pitch exhibits the highest degree of order, as evidenced by the maximum diffraction angle (2θ) and stacking height (Lc) values, and the minimum d002 value. Moreover, the addition of asphaltene enhances the yield and aromaticity of the mesophase pitch and significantly improves the thermal stability of the resulting product.

show abstract

Section: Molecular Structure Analysis Of Mesophase Pitchmentioning

confidence: 83%

The Neglected Role of Asphaltene in the Synthesis of Mesophase Pitch

Wang,

Li,

Wang

et al. 2024

Molecules

View full text Add to dashboard Cite

show abstract

“…Для получения мезофазного пека используют различные методы такие как, пиролиз [33], дистилляция [34], экстракция растворителем [35] или катализатором [36]. Полученные волокна-предшественники из мезофазного пека подвергаются термостабилизации и карбонизации при высоких температурах [30]. Высокомодульные УВ могут быть получены исключительно из мезофазного пека за счет более высокой степени графитизации в процессе термостабилизации и карбонизации волокон предшественников.…”

Section: углеродные волокнаunclassified

Пути Комплексной Переработки Углей

Имаш¹,

Кайдар²,

Жуматаев³

et al. 2021

Горение и Плазмохимия

View full text Add to dashboard Cite

Казахстан является важным мировым игроком в сфере добычи и экспорта угля на мировом рынке. На протяжении многих лет уголь является важным энергетическим ресурсом, однако развитие нанотехнологии и совершенствование существующих технологии глубокой переработки сырья, позволяют взглянуть на уголь не только как на энергетический ресурс, но и как на источник производства пористых углеродных материалов и извлечения редкоземельных элементов. Высокий спрос на редкие земли обратил взор исследователей на угольные ресурсы, как на потенциальный источник, особенно это касается высокозольных и низкосортных углей. В работе рассмотрены методы извлечения редких земель из угля и продуктов его переработки с применением кислотной, щелочной и солевой обработки. Показаны недостатки и преимущества каждого из методов. Также в работе были показаны современные пути комплексной переработки угля для получения пористых углеродных материалов, в виде активированных углей и наноуглеродного материала. Показано, что, применяя методы химической и физической активации можно получить пористые материалы с развитой удельной поверхностью и различным соотношением мезо-, микро- и макропор. Таким образом, рассмотрены новые пути переработки угля для получения новых функциональных материалов.

show abstract

“…[1][2][3][4] Thermoplastic resins are widely applied in adhesives, hot melts, printing inks, coatings, varnishes, rubber tires, sealants and floor tiles due to their excellent weatherability, light aging resistance, high-temperature stability, adhesiveness and miscibility. [5][6][7] C9 petro-based resin (C9PR), which is typically synthesized by the polymerization of C9 fraction (such as indene, methylstyrene, α-methylstyrene, dicyclopentadiene and so on) derived from the ethylene cracking in the petroleum industry, is one of the most important petro-based thermoplastic resins and possess good high-temperature stability and high mechanical property due to the high cycloaliphatic or aromatic content. 5,[7][8] hydrogenated C9 petro-based resin (HC9PR) with high oxidation stability and light color is obtained by hydrogenation of C9PR and it shows higher application value than C9PR, which is due to the fact that the C9PR is rich in unsaturated bonds, especially ethylenic C=C bond, and easy to be oxidized in the air, resulting in darker color, poor oxidation stability, poor adhesiveness and poor compatibility.…”

Section: Introductionmentioning

confidence: 99%

“…[5][6][7] C9 petro-based resin (C9PR), which is typically synthesized by the polymerization of C9 fraction (such as indene, methylstyrene, α-methylstyrene, dicyclopentadiene and so on) derived from the ethylene cracking in the petroleum industry, is one of the most important petro-based thermoplastic resins and possess good high-temperature stability and high mechanical property due to the high cycloaliphatic or aromatic content. 5,[7][8] hydrogenated C9 petro-based resin (HC9PR) with high oxidation stability and light color is obtained by hydrogenation of C9PR and it shows higher application value than C9PR, which is due to the fact that the C9PR is rich in unsaturated bonds, especially ethylenic C=C bond, and easy to be oxidized in the air, resulting in darker color, poor oxidation stability, poor adhesiveness and poor compatibility. [9][10][11] Despite a good property, the application of C9PR and HC9PR in food and pharmaceutical additives is banned since the hazard for human health, such as strong carcinogenic naphthalene and indene.…”

Section: Introductionmentioning

confidence: 99%

High-temperature stability, pyrolysis kinetics and mechanism between bio-based and petro-based resins using TG-FTIR/MS

Zhou,

Chen,

Liang

et al. 2024

Preprint

View full text Add to dashboard Cite

Pyrolysis behavior of bio-based resins is of increasing interest due to their great potential in environmentally friendly and high-temperature application. Herein, the high-temperature stability, pyrolysis kinetics and mechanism of rosin glyceride (RGE), hydrogenated rosin glyceride (HRGE), C9 petro-based resin (C9PR) and hydrogenated C9 petro-based resin (HC9PR) under non-oxidizing atmosphere were investigated by TG-FTIR/MS techniques. Based on the non-isothermal TG data, activation energy was calculated by Friedman and Starink methods, and the reaction-order model of f(α)=(1-α)n was found to be the most probable pyrolysis mechanism for different resins, which was also supported by the TG-FTIR/MS results showing only a dominating pyrolysis peak. Furthermore, thanks to the unique tricyclic phenanthrene structures, bio-based resins exhibit better high-temperature stability than petro-based resins, with an initial skeleton cracking temperature of 623 K and 573 K, respectively. High-temperature stability of resins would mildly decrease after hydromodification due to weak bonds cracking. Possible pyrolysis pathways were proposed.

show abstract

Accelerating the oxidative stabilization of pitch fibers and improving the physical performance of carbon fibers by modifying naphthalene-based mesophase pitch with C9 resin

Cited by 35 publications

References 33 publications

The Neglected Role of Asphaltene in the Synthesis of Mesophase Pitch

The Neglected Role of Asphaltene in the Synthesis of Mesophase Pitch

Пути Комплексной Переработки Углей

High-temperature stability, pyrolysis kinetics and mechanism between bio-based and petro-based resins using TG-FTIR/MS

Contact Info

Product

Resources

About