氨基聚合物共混改性聚乳酸超细纤维膜的制备及染料吸附性能
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摘要
为了提高聚乳酸超细纤维(PLA)对染料的吸附性能以制备高效染料吸附材料,将含有氨基活性基团的双氨基乙二醇(NH_2—PEG—NH_2)和壳聚糖(CS)分别与PLA共混静电纺丝制备超细纤维膜,研究NH_2—PEG—NH_2和CS质量分数对共混超细纤维膜的表面形貌、耐水性和染料吸附性能的影响。研究结果表明:随着NH_2—PEG—NH_2质量分数增加,NH_2—PEG—NH_2/PLA共混超细纤维表面微孔结构逐渐减少直至消失,耐水性逐渐下降,对酸性黄染料的吸附量均较小;随着CS质量分数增加,CS/PLA共混超细纤维表面光滑,耐水性下降,对酸性黄的吸附量增加。当CS质量分数达到12.5%时,CS/PLA共混超细纤维膜对酸性黄染料的吸附量显著增加,为39.8 mg/g。
In order to improve the dye absorption property of polylactic acid(PLA) porous superfine fibrous membrane so as to to prepare high-efficiency dye absorbent, porous superfine fibrous membrane was prepared with diaminoethanol(NH_2—PEG—NH_2) containing aminoactive group and PLA blending electrospun and with chitosan(CS) and PLA blending electrospun respectively, with a purpose of studying the impact of NH_2—PEG—NH_(2 )and CS mass fraction on surface morphology, water resistance and dye adsorption property of blending superfine fibrous membrane. Research results show that with the increase of NH_2—PEG—NH_(2 )mass fraction, the porous structure on the surface of NH_2—PEG—NH_2/PLA blending superfine fibre decreased gradually and disappeared finally and the water resistance degraded gradually, and the acid yellow dye adsorption capacity was always low. With the increase of CS mass fraction, the surface of CS/PLA blending superfine fibre was smooth, water resistance degraded, but acid yellow dye adsorption capacity increased. In the case that CS mass fraction reached 12.5%, the acid yellow dye adsorption capacity of CS/PLA blending superfine fibrous membrane significantly increased to 39.8 mg/g.
In order to improve the dye absorption property of polylactic acid(PLA) porous superfine fibrous membrane so as to to prepare high-efficiency dye absorbent, porous superfine fibrous membrane was prepared with diaminoethanol(NH_2—PEG—NH_2) containing aminoactive group and PLA blending electrospun and with chitosan(CS) and PLA blending electrospun respectively, with a purpose of studying the impact of NH_2—PEG—NH_(2 )and CS mass fraction on surface morphology, water resistance and dye adsorption property of blending superfine fibrous membrane. Research results show that with the increase of NH_2—PEG—NH_(2 )mass fraction, the porous structure on the surface of NH_2—PEG—NH_2/PLA blending superfine fibre decreased gradually and disappeared finally and the water resistance degraded gradually, and the acid yellow dye adsorption capacity was always low. With the increase of CS mass fraction, the surface of CS/PLA blending superfine fibre was smooth, water resistance degraded, but acid yellow dye adsorption capacity increased. In the case that CS mass fraction reached 12.5%, the acid yellow dye adsorption capacity of CS/PLA blending superfine fibrous membrane significantly increased to 39.8 mg/g.
引文
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[3]ZARRINI K,RAHIMI A A,ALIHOSSEINI F,et al.Highly efficient dye adsorbent based on polyaniline-coated nylon-6 nanofibers [J].Cleaner Production,2017,142:3645-3654.
[4]EUTILéRIO F C,LANGELIHLE N D,ADEDEJI A A,et al.Electrospun polyacrylonitrile nanofibers functonalized with EDTA for adsorption of ionic dyes [J].Physics and Chemistry of the Earth Parts A/B/C,2017,100:201-211.
[5]SHEN J,LI Z,WU Y N,et al.Dendrimer-based preparation of mesoporous alumina nanofibers by electrospinning and their application in dye adsorption [J].Chemical Engineering Journal,2015,264:48-55.
[6]MA Z W,KOTAKI M,RAMAKRISHNA S.Surface modified nonwoven polysulphone (PSU) fiber mesh by electrospinning:a novel affinity membrane [J].Membrane Science,2006,272(1/2):179-187.
[7]KIM J G,TAE J C,JI Y C.Homogenized electrospun nanofiber reinforced microporous polymer spong [J].Chemical Engineering,2016,306:242-250.
[8]SI Y,REN T,DING B,et al.Synthesis of mesoporous magnetic Fe3O4@carbon nanofibers utilizing in situ polymerized polybenzoxazine for water purification [J].Materials Chemistry,2012,22(11):4619-4622.
[9]ZOU L L,WANG Q J,SHEN X Q,et al.Fabrication and dye removal performance of magnetic CuFe2O4@CeO2 naofibers [J].Applied Surface Science,2015,332:674-681.
[10]BANDEGI A,MOGHBELI M R.Effect of solvent quality and humidity on the porous formation and oil absorbency of SAN electrospun nanofibers [J].Applied Polymer Science,2017,135(1):45586-55598.
[11]MEGELSKI S,STEPHENS J S,CHASE D B,et al.Micro- and nanostructured surface morphology on electrospun polymer fibers [J].Macromolecules,2002,35(22):8456-8466.