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将聚丙烯(PP)纤维先在氩(Ar)气氛等离子体场下生成表面活性自由基,而且与空气中的氧生成过氧自由基,然后在加热的条件下引发单体丙烯酸(AA)进行接枝反应,再和三乙烯四胺(TETA)进行酰胺化反应,制备出了PP-g-AA-TETA螯合纤维。采用FT-IR、SEM和自制毛细管微压计等,考察了PP-g-AA-TETA螯合纤维表面特征官能团的归属、微观形貌和纤维的亲水性。结果表明:在PP纤维表面陆续接枝了AA和TETA,水接触角随胺化量的增大而减小,从87.4°(脱脂棉为基准)减少到74.8°。最佳等离子条件为:气氛压强15 Pa,功率30 W,时间3 min。最佳液相接枝AA的反应条件为:硫酸亚铁铵加入量0.0800 g/100m L,AA单体浓度30%,反应温度60℃。最佳酰胺化反应条件为:温度60℃、时间12 h。
Polypropylene (PP) fibers first generate surface-active radicals under the plasma atmosphere of argon (Ar) atmosphere and form peroxy radicals with the oxygen in the air, and then initiate the monomer acrylic acid (AA) under heating conditions Graft reaction, and then triethylenetetramine (TETA) amidation reaction, prepared PP-g-AA-TETA chelate fiber. The functional groups of PP-g-AA-TETA chelate fiber were investigated by FT-IR, SEM and self-made micro capillary pressure gauge. The ownership, microstructure and hydrophilicity of the fibers were investigated. The results showed that AA and TETA were grafted on the surface of PP fibers. The contact angle of water decreased with the increase of the amount of amination, decreasing from 87.4 ° (cotton wool base) to 74.8 °. The best plasma conditions are: atmospheric pressure 15 Pa, power 30 W, time 3 min. The best liquid phase grafting AA reaction conditions: ammonium ferrous sulfate added amount of 0.0800 g / 100m L, AA monomer concentration of 30%, the reaction temperature is 60 ℃. The optimum conditions of amidation reaction: temperature 60 ℃, time 12 h.