In-Situ Doping B4C Nanoparticles in Mesophase Pitch for Preparing Carbon Fibers with High Thermal Conductivity by Boron Catalytic Graphitization

被引：4

作者：

Liu, Yue ^{[1
]}

Liu, Jiahao ^{[1
]}

Yang, Jianxiao ^{[1
]}

Wu, Xiao ^{[1
]}

Li, Jun ^{[2
]}

Shi, Kui ^{[1
]}

Liu, Bo ^{[3
]}

Tan, Ruixuan ^{[1
]}

机构：

[1] Hunan Univ, Coll Mat Sci & Engn, Hunan Prov Key Lab Adv Carbon Mat & Appl Technol, Changsha 410082, Hunan, Peoples R China

[2] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410114, Peoples R China

[3] Jilin Univ, Key Lab Bion Engn, Minist Educ, Changchun 130022, Peoples R China

来源：

MOLECULES | 2022年 / 27卷 / 16期

关键词：

mesophase pitch; carbon fiber; graphitization; OXIDATIVE STABILIZATION; CARBONIZATION;

D O I：

10.3390/molecules27165132

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The boron carbide (B4C) nanoparticles doping mesophase pitch (MP) was synthesized by the in-situ doping method with tetrahydrofuran solvent, and the corresponding MP-based carbon fibers (CFs) were successfully prepared through the melt-spinning, stabilization, carbonization and graphitization processes. The structural evolution and properties of boron-containing pitches and fibers in different processes were investigated for exploring the effect of B4C on mechanical, electrical and thermal properties of CFs. The results showed that the B4C was evenly dispersed in pitch fibers to provide active sites of oxygen, resulting in a homogeneous stabilization and ameliorating the split-ting microstructures of CFs. Moreover, the thermal conductivity of B1-MP-CF prepared with 1 wt.% B4C increased to 1051 W/m center dot K, which was much higher than that of B0-MP-CF prepared without B4C (659 W/m center dot K). While the tensile strength of B4C-doped CFs was lower than that of pristine CFs. In addition, a linear relationship equation between the graphite microcrystallite parameter (I-D/I-G) calculated from Raman spectra and the thermal conductivity (lambda) calculated according to the electrical resistivity was found, which was beneficial to understand the thermal properties of CFs. Therefore, the doping B4C nanoparticles in MP did play a significant role in reducing the graphitization temperatures due to the boron catalytic graphitization but decreasing the mechanical properties due to the introduction of impurities.

引用

页数：14