摘要
采用热沉降工艺将中间相沥青中的各向同性组分与各向异性组分相分离,从而提高中间相含量,可以得到100%光学各向异性组分,同时对不同组分进行分子量、XRD、流变性等表征分析,研究了中间相沥青的各向同性组分与各向异性组分的差异,并利用分离出的各向同性组分与各向异性组分沥青分别纺制沥青碳纤维,研究不同组分制备沥青碳纤维的性能差异。结果表明,以各向异性组分制备的沥青碳纤维拉伸强度可达1500～1800MPa,明显高于各向同性组分沥青碳纤维300～500MPa的拉伸强度。
The synthesis of mesophase pitch from coal pitch can effectively reduce production costs and promote large-scale use of mesophase pitches.However,mesophase pitch synthesized from coal pitch is usually a mixture of isotropic and anisotropic components,which decreases the performance of mesophase pitch based carbon products.Therefore,it is important to develop effective separation methods to enhance the content of anisotropic phase and hence improve the performance of the final product.The isotropic and anisotropic phases of synthesized mesophase pitch were separated through thermal precipitation process.Molecular weight analysis,XRD diffraction and rheology characterization of different fractions were studied.Meanwhile,different fractions of synthesized pitch were spun into carbon fiber,and the mechanical properties of carbon fiber were tested.The results showed that thermal precipitation can effectively separate the isotropic and anisotropic phases of synthesized pitch.The tensile strength of carbon fiber prepared from anisotropic phase pitch was 1500～1800 MPa which was significantly higher than tensile strength of 300～500 MPa of carbon fiber prepared from isotropic phase pitch.
作者
刘均庆
段春婷
郑冬芳
梁朋
王秋实
Liu Junqing, Duan Chunting, Zheng Dongfang, Liang Peng, Wang Qiushi(National Institute of Clean-and-Low-Carbon Energy, Beijing 10221)
出处
《化工新型材料》
CAS
CSCD
北大核心
2018年第10期165-169,共5页
New Chemical Materials
关键词
中间相沥青
相分离
碳纤维
mesophse pitch
phase separation
carbon fiber
