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首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >Surface modification of low density polyethylene films by homogeneous catalytic ozonation
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Surface modification of low density polyethylene films by homogeneous catalytic ozonation

机译：低密度聚乙烯的表面改性电影由均相催化臭氧化

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摘要

Low density polyethylene films were treated by ozone to generate peroxides on the surfaces. The peroxides generated are capable of initiating radical graft polymerization of hydrophilic vinyl monomers onto the polymers, resulting in hydrophilic surfaces. Results of ozonation revealed that molecular ozone instead of hydroxyl radicals was the main oxidant for peroxide generation. A novel approach, aqueous ozonation with the addition of a soluble transitional metal salt, FeCl3, as a homogeneous catalyst, was proposed and proved to be successful in this study. The addition of FeCl3 could increase peroxide generation by 22.7%, compared to its non-catalyzed counterpart. An optimum catalyst concentration, 0.04 g'L, was determined. Also, the effects of pH, ozonation time and applied ozone dose on peroxide generation were investigated. The loss in tensile strength of the films would be 15% or less if the applied ozone dose was not over 2wt.%. The functional groups generated on the film surfaces were characterized by FTIR, the contact angle and surface roughness of the film were also examined before and after ozonation.
机译：低密度聚乙烯膜处理臭氧生成过氧化物的表面。过氧化物生成能够启动亲水性乙烯自由基接枝聚合单体的聚合物,导致亲水表面。表明分子臭氧代替羟基为过氧化自由基是主要的氧化剂的一代。与添加可溶性过渡金属盐,FeCl3作为均相催化剂,提出并证明是成功的研究。过氧化物生成22.7%,与它相比non-catalyzed。浓度,0.04 g孩子们,决心。pH值的影响,臭氧化时间和应用臭氧剂量对过氧化氢生成调查。电影将15%或更少,如果应用臭氧剂量不超过2 wt. %。这部电影表面上生成的特征通过红外光谱、接触角和表面粗糙度电影也检查了之前和之后臭氧化。

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