螺旋片静电纺聚酰胺复合膜的制备及其黏合性能

Preparation and adhesion properties of polyamide composite membranes by needleless electrospinning using spiral piece spinnerets

以聚酰胺6（PA6）为原料,采用螺旋片式无针头静电纺丝设备,探究了纺丝工艺参数对静电纺PA6纳米纤维膜形态结构的影响。结果表明,在一定范围内,螺旋片式静电纺PA6纳米纤维直径随着纺丝电压的增大而减小,随着纺丝距离的增大而增大,随着发生器转速的增加呈波动趋势,纤维的均匀性均无明显变化。通过正交试验得到优化工艺条件为：纺丝电压70~80 k V,纺丝距离185 mm,发生器转速8 r/min。此条件下所纺纤维平均直径为163 nm,纤维CV值为26%。初步探索了等离子体纺粘丙纶（PP）基布预处理对PA6/PP复合膜黏合效果的影响。结果表明,在80 W、30 s的条件下,剥离能较未处理试样提高了2.82倍,最大剥离强力可提高1.97倍。

In this paper,polyamide 6（ PA6） nanofiber membranes were manufactured by a needleless electrospinning equipment using spiral coil spinnerets. Effects of electrospun parameters on the morphology and structure of PA6 nanofiber membranes were studied. The results showed that the nanofiber diameters of the PA6 membranes decreased with the increase of the spinning voltage,while they increased with increasing the spinning distance,but a fluctuating trend appeared when the rotation speed of the spiral coil spinnerets were turned larger. However,the uniformities of the nanofiber diameters nearly had no change when the above three parameters were varied. The optimal electrospinning parameters were obtained by a three factors and three levels orthogonal experiment： the spinning voltage of 70 ~ 80 k V,the spinning distance of 185 mm,and the spinnerets rotation speed of 8 r / min,and the diameter and CV value of the as-spun nanofiber were 163 nm and 26%,respectively. Meanwhile,the influence of the spunbond polypropylene（ PP） nonwoven substrate pretreated by plasma on the adhesion of the PA6 / PP composite membrane was also investigated. The results showed that the peeling energy of the specimen using the substrate pretreated by plasma of 80 W for 30 s was improved by 2. 82 times compared with that of the untreated specimen,while the maximum peeling strength increased by 1. 97 times.