摘要
利用空气氧化碳纤维(CF),研究硼氢化钠(NaBH4)和四氢铝锂(LiAlH4)对氧化碳纤维的还原作用. 借助傅立叶红外光谱、X光光电子能谱,研究碳纤维表面氧化、还原后官能团的变化. 结果表明:氧化可使CF表面的≡C—H部分转化为含氧基团,而NaBH4 的还原可使CF表面官能团= C= O部分转化为—OH,LiIH4 还原可使CF表面官能团—CO—,—COO—部分转化为—OH.从而获得表面官能团—OH含量较高的碳纤维,可望为其复合材料界面化学研究提供一种方法.同时,提出了CF表面氧化、还原的机理.
Carbon fiber (CF)is oxidized by air,and the reduction of oxidized CF is studied by sodium borohydride (NaBH 4) and lithium aluminium tetrahydride (LiAlH 4).With the help of Fourier IR spectrum and X ray photoelectron spectroscopy,the authors study the change of functional groups on the surface of CF after oxidation and reduction.As shown by the results,≡C—H on the surface of CF can be partly transformed onto oxygen containing group by oxidation;the functional group =C=O on the surface of CF can be partly transformed into —OH by NaBH 4 reduction;the functional groups —CO—,—COO— on the surface of CF can be partly transformed into —OH by LiAlH 4 reduction.Thus a carbon fiber with a higher surface functional groups —OH content can be obtained;and a method can be expected to be proposed for studying surface chemistry of its composite material;and the mechanism of oxidation and reduction on the surface of carbon fiber can be explained.
出处
《华侨大学学报(自然科学版)》
CAS
1999年第4期354-357,共4页
Journal of Huaqiao University(Natural Science)
基金
国家自然科学基金
福建省自然科学基金