首页> 外文会议>The 5th International Symposium on Feedstock and Mechanical Recycling of Polymeric Materials(ISFR2009)(第五届高分子材料回收国际研讨会) >SELECTIVE SURFACE OZONATION OF POLYVINYL CHLORIDE FOR ITS SEPARATION FROM WASTE PLASTIC MIXTURE BY FROTH FLOATATION
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SELECTIVE SURFACE OZONATION OF POLYVINYL CHLORIDE FOR ITS SEPARATION FROM WASTE PLASTIC MIXTURE BY FROTH FLOATATION

机译:泡沫浮选从废塑料混合物中分离氯乙烯的选择性表面臭氧化

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摘要

The separation of waste plastics is important for its feedstock and mechanical recycling. The selective surface hydrophilization of polyvinyl chloride (PVC) by ozonation was studied as the pre-treatment of its separation by the following froth flotation. The ozonation could selectively increase the hydrophilicity of the surface of PVC among plastic mixture with three other plastics. The hydrophilization of PVC by surface analysis would be due to the hydrophilic groups produced by ozonation. XPS and AFM analysis revealed that the increase was due to the structural change in chlorine group in PVC to hydroxylic acid, ketone and carboxylic groups by ozonation. The separation of PVC from other plastics could be achieved by the combination of the pre-ozonation and the following froth floatation. The effect of some condition onto separation efficiency in the froth floatation was also investigated.
机译:废塑料的分离对其原料和机械回收很重要。研究了通过臭氧化对聚氯乙烯(PVC)进行的选择性表面亲水化,作为通过以下泡沫浮选分离聚氯乙烯的预处理方法。臭氧化可以选择性地增加与其他三种塑料的塑料混合物中PVC表面的亲水性。通过表面分析使PVC亲水化是由于臭氧化产生的亲水基团。 XPS和AFM分析表明,这种增加是由于PVC中氯基通过臭氧化反应转变为羟基酸,酮和羧基的结构变化。通过将预臭氧化和随后的泡沫浮选相结合,可以将PVC与其他塑料分离。还研究了某些条件对泡沫浮选分离效率的影响。

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