聚丙烯腈(PAN)隔膜具有优秀的电化学性能,作为锂离子电池隔膜材料受到广泛关注,但其机械强度与耐热性不足问题依然存在。本文选用由软段与硬段构成的聚合物热塑性聚氨酯(TPU)与PAN进行混纺,并将制备的纤维膜通过^(60)Coγ射线对其改性,...聚丙烯腈(PAN)隔膜具有优秀的电化学性能,作为锂离子电池隔膜材料受到广泛关注,但其机械强度与耐热性不足问题依然存在。本文选用由软段与硬段构成的聚合物热塑性聚氨酯(TPU)与PAN进行混纺,并将制备的纤维膜通过^(60)Coγ射线对其改性,制备出一种新型锂离子电池隔膜。通过FTIR发现辐照改性PAN/TPU隔膜,PAN分子间出现环化反应,并且PAN与TPU分子间出现C=N-N键的交联,环和交联结构的引入都提高隔膜的力学与耐热性能,此外通过100 k Gy改性后的隔膜电化学性能优异,具有较高的吸液率(552%)与孔隙率(68.2%),电化学稳定窗口为5.42 V,界面阻抗为149.44Ω,离子电导率为1.68×10^(-3)S/cm,均优于辐照前的隔膜,1 C下循环100次后放电容量保持率为96.53%,并在循环测试中表现出优异的倍率性能。展开更多
Thirty cases of central type lung cancer complicated with airway obstruction were treated with intrabronchial microwave tissue coagulation (IMTC ) in combination with Ir 192 radiation (Ir192--IR ). The needle--shaped ...Thirty cases of central type lung cancer complicated with airway obstruction were treated with intrabronchial microwave tissue coagulation (IMTC ) in combination with Ir 192 radiation (Ir192--IR ). The needle--shaped microwave irradiator was modified by the authors. After the treatment, airway obstruction was completely released in 19 cases and partially released in 10. Only 1 case had no response. In 4 to 6 months after the treatment, 20 out of the 30 cases that were followed up presented with no bronchial bleeding, fistula formation or other complications. of the 20 cases, 10 showed complete remission and the other 10 showed partial remission.展开更多
文摘聚丙烯腈(PAN)隔膜具有优秀的电化学性能,作为锂离子电池隔膜材料受到广泛关注,但其机械强度与耐热性不足问题依然存在。本文选用由软段与硬段构成的聚合物热塑性聚氨酯(TPU)与PAN进行混纺,并将制备的纤维膜通过^(60)Coγ射线对其改性,制备出一种新型锂离子电池隔膜。通过FTIR发现辐照改性PAN/TPU隔膜,PAN分子间出现环化反应,并且PAN与TPU分子间出现C=N-N键的交联,环和交联结构的引入都提高隔膜的力学与耐热性能,此外通过100 k Gy改性后的隔膜电化学性能优异,具有较高的吸液率(552%)与孔隙率(68.2%),电化学稳定窗口为5.42 V,界面阻抗为149.44Ω,离子电导率为1.68×10^(-3)S/cm,均优于辐照前的隔膜,1 C下循环100次后放电容量保持率为96.53%,并在循环测试中表现出优异的倍率性能。
文摘Thirty cases of central type lung cancer complicated with airway obstruction were treated with intrabronchial microwave tissue coagulation (IMTC ) in combination with Ir 192 radiation (Ir192--IR ). The needle--shaped microwave irradiator was modified by the authors. After the treatment, airway obstruction was completely released in 19 cases and partially released in 10. Only 1 case had no response. In 4 to 6 months after the treatment, 20 out of the 30 cases that were followed up presented with no bronchial bleeding, fistula formation or other complications. of the 20 cases, 10 showed complete remission and the other 10 showed partial remission.
