可光降解聚氯乙烯地膜的研制

Preparation of PVC Film with Photodegradation Property

[目的]探讨二维碳材料应用于提高聚氯乙烯(PVC)农用塑膜光降解速率的可行性。[方法]分别通过添加痕量氧化石墨(GO)和石墨烯(GS)作为光催化剂,利用石墨烯比表面积大、热稳定性好、化学稳定性高、高光学透射率等优点,制备出可有效光降解的聚氯乙烯(PVC)复合膜,并检测其光降解活性。[结果]随着光照时间的增加,GO/PVC复合膜的光降解速率和纯PVC膜基本相当,但是GS/PVC复合膜的光降解速率至少比另外两种提高了一倍。[结论]该法有望实现低成本可降解地膜的生产和应用,有效减少"白色污染"。

[Objective] To explore the feasibility of using two dimensional carbon materials to improve the photodegradation property.[Method] By adding trace amount of graphene oxide （GO） and graphene （GS） as photo catalysts,using the properties of graphene sheets such as high specific surface areas,high stability of thermal,excellent chemical stability and high light transportation radio,we prepared PVC compound films which could be photodegradated effectively,and we also detected the photodegradation effect.[Result] With the increase of illumination time,photodegradation rate of GO/PVC composite membrane is equivalent with pure PVC film,photodegradation rate of GS/PVC composite membrane is at least doubled than the others.[Conclusion] The method could be used to perform the production and application of photo degradated films with low cost,which could reduce ＂white pollution＂ effectively.