TPU/TiO_(2)/PDMS复合纤维膜的制备及性能研究

Preparation and Properties of TPU/TiO_(2)/PDMS Composite Fibrous Membranes

为了制备兼具防紫外线性能和疏水性能的TPU/TiO_(2)/PDMS复合纤维膜,采用静电纺丝与纳米颗粒超声负载相结合的技术将TiO_(2)纳米颗粒成功地负载于TPU静电纺丝纤维膜中,并用PDMS对负载了TiO_(2)纳米颗粒的TPU静电纺丝纤维膜进行固化处理,SEM结果表明:TPU/TiO_(2)/PDMS复合纤维膜的表面被成功地负载上了TiO_(2)纳米颗粒,且分布较均匀;防紫外测试结果表明TiO_(2)纳米颗粒在纤维膜上的负载使TPU静电纺丝纤维膜的UPF值得到了极大的提升,随着TiO_(2)纳米颗粒负载量的增加,TPU/TiO_(2)/PDMS复合纤维膜的UPF值逐渐增加,且当TiO_(2)纳米颗粒负载量为1.5 wt%时,UPF值大幅提升了75.8%.接触角测试结果表明在TiO_(2)纳米颗粒与PDMS共同构筑的粗糙且低表面能的复合纤维膜表面下,纤维膜的表面由亲水转变为疏水状态,随着TiO_(2)纳米颗粒负载量的增加,TPU/TiO_(2)/PDMS复合纤维膜的接触角逐渐增大,且当TiO_(2)纳米颗粒负载量为1.5 wt%时,接触角增大至124°.最终制备得到的TPU/TiO_(2)/PDMS复合纤维膜具有良好的防紫外线性能和疏水性能.

In order to prepare TPU/TiO_(2)/PDMS composite fibrous membranes with UV resistance and hydrophobic properties,TiO_(2)nanoparticles are successfully loaded onto TPU electrospun fibrous membrane by electrospinning and nanoparticle ultrasonic loading technology,and TPU electrospun fibrous membranes loaded with TiO_(2)nanoparticles are cured by PDMS.SEM results show that TiO_(2)nanoparticles are successfully loaded on the surface of TPU/TiO_(2)/PDMS composite fibrous membranes and are distributed uniformly.The UV resistance test results show that the loading of TiO_(2)nanoparticles on the fiber membrane greatly improves the UPF value of TPU electrospun fibrous membrane.With the increase of the amount of TiO_(2)nanoparticles,the UPF value of TPU/TiO_(2)/PDMS composite fibrous membranes gradually increases.When the amount of TiO_(2)nanoparticles is 1.5 wt%,the UPF value significantly increases by 75.8%.The contact angle test results show that based on the rough and low energy surface of composite fiber membranes constructed by TiO_(2)nanoparticles and PDMS,the surface of the fiber membranes is changed from hydrophilic to hydrophobic.With the increase of TiO_(2)nanoparticles,the contact angle of TPU/TiO_(2)/PDMS composite fibrous membranes gradually increases,When the TiO_(2)nanoparticles loading is 1.5 wt%,the contact angle increased to 124°.The TPU/TiO_(2)/PDMS composits fibrous membranes show good UV resistance and hydrophobic properties.