臭氧水对负压封闭引流材料理化性质影响的实验研究

Effect of ozonated water on physical and chemical properties of vacuum sealing drainage material

目的探讨一定浓度的臭氧水对负压封闭引流(VSD)材料理化性质的影响。方法使用臭氧水发生器制取浓度为10μg/ml臭氧水后,将VSD材料(泡沫和密封膜)浸于其中充分接触,1 h/次,2次/d,持续8 d后,观察材料的大体外观及显微结构的变化,对作用前后的材料分别进行拉力测试和拉曼光谱扫描,同时制作体外负压封闭引流模拟装置,采取相同的干预方法后,负压源下检测装置的密闭效果。结果 10μg/ml臭氧水持续8 d作用后,泡沫的大体外观未见异常,显微镜下泡沫与密封膜的微孔等结构未见明显破坏。拉力测试结果表明,泡沫最大拉伸负荷作用前后分别为4.25±0.73、2.44±0.19 kgf(P=0.000),试样瞬间断裂间距作用前后分别为92.54±12.83、64.44±4.60 mm(P=0.000);密封膜的最大拉伸负荷作用前后分别为0.70±0.58、0.71±0.08kgf(P=0.698),试样瞬间断裂间距作用前后分别为99.30±10.27、100.95±18.22 mm(P=0.966)。拉曼光谱仪结果显示,VSD材料在400-4000 cm-1扫描范围内仅有部分波峰强度发生变化而无新的化学基团生成。体外装置经臭氧水作用8 d后,装置密闭性仍良好。结论 10μg/ml的臭氧水与VSD材料作用8 d后,除泡沫的抗拉伸性能降低外,其余理化性质未发生显著变化。

Objective To investigate the influence of ozonated water on physical and chemical properties of vacuum sealing drainage （VSD） materials. Methods VSD materials （foam and sealing membrane） were immersed in 10μg/ml ozonated water for I h twice daily for 8 days. The foam appearance and microscopic structure of the materials were observed, and tensile tests and Raman spectrum scan were performed assess the effect of ozonated water. Simulated VSD devices were prepared and tested for leakproofness under negative pressure after ozonated water treatment. Results Ozonated water treatment for 8 days caused no obvious abnormal changes in the foam appearance or microscopic structure of the materials. The maximum tensile load of foam before and after ozonated water treatment was 4.25±0.73 kgf and 2.44±0.19 kgf （P=0.000）, the momentary distance when the foam torn before and after intervention was 92.54 ± 12.83 mm and 64.44 ±4.60mm, respectively （P=0.000）. The corresponding results for VSD sealing membrane were 0.70±0.58 kgf and 0.71±0.08 kgf （P=0.698）, and 99.30±10.27 mm and 100.95±18.22 mm （P=0.966）, respectively. Raman spectroscopy revealed changes in only several wave intensities and no new chemical groups appeared within the scan range of 400-4000 cm^-1. The VSD device was well hermetic after treatment with ozonated water. Conclusion Except for a decreased stretch resistance property of the foam, VSD materials display no obvious changes in physical and chemical characteristics after treatment with ozonated water for 8 days.