溶剂对PVAc/SnO_2杂化纳米纤维可纺性及热学性能的影响

Influence of solvents on spinnability and thermal property of PVAc/SnO_2 hybrid nanofibers

利用超声水解法制备Sn(OH)4水溶胶,在甲醇、甲醇/乙醇、丙酮3种不同共溶剂的条件下,与聚醋酸乙烯酯(PVAc)混合后通过静电纺丝制备PVAc/SnO2杂化纳米纤维。通过对纤维形貌观察、傅里叶红外光谱测试以及热重分析,研究不同品种溶剂对杂化纤维成形的作用以及添加SnO2对PVAc纤维热学性能的影响。实验结果表明:采用甲醇/乙醇混合溶剂的PVAc/SnO2体系最稳定;Sn(OH)4的加入明显改善了质量分数为8%的PVAc纳米纤维形貌,纤维粗细均匀,光滑,无竹节;PVAc与SnO2之间具有氢键作用,Sn(OH)4的加入提高了PVAc的热稳定性,使分解温度最多提高150℃左右。

Ultrasonic-assisted hydrolysis method was applied to prepare Sn（OH）4 hydrosol,and hybrid nanofibers were fabricated by electrospinning a mixture of PVAc and Sn（OH）4 hydrosol in different cosolvents,such as methanol,methanol/ ethanol or acetone.The influence of different solvents on the nanofiber forming and influence of the addition of SnO2 on the thermal property of PVAc were investigated by morphologic observation,Fourier transform infrared spectrum analysis and thermo gravimetric measurement.The experimental results revealed that the most stable PVAc/SnO2 system was in methanol/ethanol cosolvent,and addition of Sn（OH）4 obviously improved the morphology of PVAc nanofiber with the mass of 8% PVAc fraction.The nanofiber was uniform and smooth,without slub.Hydrogen bonding was observed between PVAc and SnO2.The addition of Sn（OH）4 improved the thermal stability of PVAc whose highest thermal decomposition temperature was up to 150 ℃.