采用自主设计的熔体离心纺丝设备研究了聚己二酸对苯二甲酸丁二醇酯(PBAT)的可纺性,并分析纺丝参数对PBAT纤维形貌和性能的影响。结果表明:挤出机温度为220℃、喷丝器温度为200℃、电机转速为4000 r min、收集距离为18 cm时纤维形貌最佳...采用自主设计的熔体离心纺丝设备研究了聚己二酸对苯二甲酸丁二醇酯(PBAT)的可纺性,并分析纺丝参数对PBAT纤维形貌和性能的影响。结果表明:挤出机温度为220℃、喷丝器温度为200℃、电机转速为4000 r min、收集距离为18 cm时纤维形貌最佳;纺丝温度的提高可有效避免纤维卷曲以及纤维细化;随着纺丝温度的增加,聚合物熔体黏度下降,流动性变好,制备的纤维分布更加均匀,纤维结晶度得到提高,纤维膜的力学性能得到明显改善,其最大应力提高至15.3 MPa,最大应变为80%。展开更多
A mass flow matching model(MFMM)was established for studying the stable status of solution electrospinning.The study of the solution droplet status at the needle tip focused on various combinations of applied voltages...A mass flow matching model(MFMM)was established for studying the stable status of solution electrospinning.The study of the solution droplet status at the needle tip focused on various combinations of applied voltages and injection rates to figure out their influence on steadily fabricating polyvinyl alcohol(PVA)nanofibers prepared from PVA spinning solutions with two different mass fractions(10%and 16%).The results revealed that during the stable electrospinning,the influence resulted from the change of the injection rate approximately canceled out the impact brought by adjusting the applied voltage,leading to almost the same morphology as that of the PVA nanofibers.And the mass fraction of PVA in the spinning solution dominated the structure and the diameter distribution of the electrospun nanofibers.Under stable electrospinning conditions,the composite membrane was produced by depositing PVA nanofibers on the polyethylene terephthalate(PET)nonwoven substrate for an air filtration test.Furthermore,the prepared composite membrane exhibited a high air filtration efficiency(99.97%)and a low pressure drop(120 Pa)for 300-500 nm neutralized polystyrene latex(PSL)aerosol particles,demonstrating its potential as an alternative for a variety of commercial applications in air filtration.展开更多
文摘采用自主设计的熔体离心纺丝设备研究了聚己二酸对苯二甲酸丁二醇酯(PBAT)的可纺性,并分析纺丝参数对PBAT纤维形貌和性能的影响。结果表明:挤出机温度为220℃、喷丝器温度为200℃、电机转速为4000 r min、收集距离为18 cm时纤维形貌最佳;纺丝温度的提高可有效避免纤维卷曲以及纤维细化;随着纺丝温度的增加,聚合物熔体黏度下降,流动性变好,制备的纤维分布更加均匀,纤维结晶度得到提高,纤维膜的力学性能得到明显改善,其最大应力提高至15.3 MPa,最大应变为80%。
文摘A mass flow matching model(MFMM)was established for studying the stable status of solution electrospinning.The study of the solution droplet status at the needle tip focused on various combinations of applied voltages and injection rates to figure out their influence on steadily fabricating polyvinyl alcohol(PVA)nanofibers prepared from PVA spinning solutions with two different mass fractions(10%and 16%).The results revealed that during the stable electrospinning,the influence resulted from the change of the injection rate approximately canceled out the impact brought by adjusting the applied voltage,leading to almost the same morphology as that of the PVA nanofibers.And the mass fraction of PVA in the spinning solution dominated the structure and the diameter distribution of the electrospun nanofibers.Under stable electrospinning conditions,the composite membrane was produced by depositing PVA nanofibers on the polyethylene terephthalate(PET)nonwoven substrate for an air filtration test.Furthermore,the prepared composite membrane exhibited a high air filtration efficiency(99.97%)and a low pressure drop(120 Pa)for 300-500 nm neutralized polystyrene latex(PSL)aerosol particles,demonstrating its potential as an alternative for a variety of commercial applications in air filtration.
