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摘要
采用熔融共混和吹塑成型工艺制备了无孔型热塑性聚氨酯弹性体(TPU)薄膜。以膜厚度、温度和相对湿度为变量对TPU薄膜的透湿和透气性能进行测试分析,并对其表面形貌、成分含量、热稳定性进行了表征。实验结果表明:TPU薄膜的透湿量随着膜厚度的增加而减小,薄膜透湿量随着温湿度的升高而显著增加;按ASTME96 BW—2000标准测试,厚度为0.012mm的TPU薄膜透湿量达7093g/(m2·d)。利用扫描电子显微镜观察到TPU薄膜表面相对平整,未发现微孔结构。气体渗透率测试分析表明,CH4和N2基本无法透过TPU薄膜,因此TPU薄膜可以有效地阻隔细菌与病毒入侵。傅里叶变换红外光谱表征结果显示,1000～1300cm-1处出现Si—O伸缩振动吸收峰,证明纳米SiO2成功掺杂到TPU中。
Abstract
A serial TPU films were prepared with SiO2 by the melt blending technique via blow molding.The moisture and air permeability of film were analyzed by various thicknesses,temperatures and relative humidity.The surface morphology,composition and thermal stability were also characterized.The results showed that the moisture permeability decreased with the increasing of film thickness.The highest value of moisture permeability was measured as 7093g/(m2·d) when the film thickness of 0.012mm by ASTME96 BW-2000 standard method.The moisture permeability increased with the increasing of temperature and humidity.SEM images of films illustrated that the surface was no-porous structure.Furthermore,the results of permeability test indicated that the films were impermeable with CH4 and N2,and could form a biological defence against bacteria and viruses.The results of FT-IR infrared spectroscopy showed that an apparent Si—O stretching vibration absorption at 1000～1300cm-1 peak,which indicated the nanostructural SiO2 was doped in TPU.
关键词
熔融共混
/
透湿性
/
无孔
/
透气性
Key words
melt blending
/
moisture permeability
/
non-porous structure
/
air permeability
新型无孔透湿TPU薄膜的制备及其服用性能研究[J].
化工新型材料, 2019, 47(1): 220-224 DOI:
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基金资助
上海大学校项目(D.11-0111-10-801)
