Amidoxylated polyacrylonitrile(AOPAN)solution was prepared by the reaction of hydroxylamine hydrochloride and polyacrylonitrile(PAN). At the same time, the coaxial nanofibers(AOPAN@PAN)with AOPAN as shell and PAN as core was prepared by coaxial electrospinning technology. And the morphology, composition and mechanical properties of nanofibers were characterized by means of transmission electron microscopy(TEM), scanning electron microscopy(SEM)and infrared(FTIR). The results showed that the strength of AOPAN@PAN coaxial nanofibers increased with the increase of PAN dosage. The tensile strength and elongation at break of nanofibers was 3.677 MPa and 18.03% when the mass ratio of core to shell was 1:3,and the maximum adsorption capacities of Cu2 +, Pb2 +, CrO2-4and methyl orange(MO)was 135.1, 151.2,120.48 and 43.45 mg/g, respectively. At the same time, the concentrations of Cu2+, Pb2 +, CrO2-4 and MO are reduced to 0.17,0.03,0.06 and 0.91 mg/L after treatment with this nanofiber.%将盐酸羟胺与聚丙烯腈(PAN)反应得到偕胺肟化聚丙烯腈(AOPAN)溶液,随后采用同轴静电纺丝技术,制备了以AOPAN为壳,PAN为芯的同轴纳米纤维(AOPAN@PAN).通过透射电子显微镜(TEM)、扫描电子显微镜(SEM)和红外光谱(FTIR)等对纤维的形貌、组成和力学性能进行了表征.结果表明,随着PAN用量的增加,AOPAN@PAN同轴纳米纤维的强度逐渐变大,当芯层与壳层质量比为1:3时,纳米纤维的抗拉伸强度和断裂伸长率分别为3.677 MPa和18.03%;对Cu2+,Pb2+,CrO2-4和甲基橙(MO)的最大吸附量分别为135.1,151.2,120.48和43.45 mg/g;使水中Cu2+,Pb2+,CrO2-4和MO的浓度分别降低到0.17,0.03, 0.06和0.91 mg/L.
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