用SAXS研究炭化温度对PANCF孔特征的影响  

Effect of carbonization temperature on void characteristics of PANCF by SAXS

作　　者：郭建强[1,2] 吾满江.艾力 温月芳[3] 杨永岗[3] 高忠民[4] 李向山[4] 

机构地区：[1]中国科学院新疆理化技术研究所,新疆乌鲁木齐830011 [2]中国科学院研究生院,北京100049 [3]中国科学院山西煤炭化学研究所中国科学院炭材料重点实验室,山西太原030001 [4]吉林大学无机合成与制备化学国家重点实验室,吉林长春130012

出　　处：《炭素技术》2010年第4期17-20,共4页Carbon Techniques

基　　金：973计划项目(2006CB605304);国家自然科学基金项目(50604025)

摘　　要：用SAXS研究了炭化温度(1100～1400℃)对PANCF孔特征的影响。结果表明,随着炭化温度的升高,孔洞半长轴(c值)约为2nm孔所占比例逐渐减小,由78.72%逐渐减小至66.64%,而c值约为5nm孔的所占比例逐渐增大,由20.39%逐步增大至32.91%,这可能是由于氮气的逸出和微晶数量的增加所致。随着炭化温度的升高,c值约为2nm和5nm孔的长径比逐渐增加。c值约为5nm孔的长径比最大,达4.65。而c值约为10nm和28～48nm较大孔的孔径逐渐减小且长径比也减小。随着炭化温度的升高,孔的取向角逐渐减小,由25.1°减小至18.9°。The void characteristics of polyacrylonitrile-based carbon fiber carbonized at 1 100 ～ 1 400 ℃ were studied by SAXS.The results show that,as the carbonization temperature rises,the proportion of voids with semi-major axis c ≈ 2 nm gradually decreases from 78.72% to 66.64% ,while the proportion with c ≈ 5 nm gradually increases from 20.39% to 32.91% .This may be due to the escape of nitrogen and increase of crystallite.The c/a value while c ≈ 2 nm and 5nm increases with the rise of carbonization temperature,which reaches the summit at 4.65 with c ≈ 5 nm.However,the diameter of voids as well as the c/a value with c ≈ 10 nm and 28 ～ 48 nm decreases.And with the increase of carbonization temperature,the orient angle of voids decreases from 25.1° to 18.9°.

关 键 词：SAXS 聚丙烯腈基炭纤维 炭化温度 孔 

分 类 号：TQ342.742[化学工程—化纤工业] TQ424.1