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Preparation and characterization of cation exchange resins based on locally fabricated polythylene pallets

机译：基于本地制造的聚乙烯托盘的阳离子交换树脂的制备和表征

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摘要

The objective of the present project was to prepare and characterize cation exchange resins based locally fabricated low density polyethylene (LDPE) using radiation induced grafting method. The resins denoted as LDPE-g-PSSA were prepared by radiation induced grafting of styrene monomer onto LDPE particles followed by sulfonation reaction to introduce sulfonic acid moiety. The effect of various reaction parameters such as monomer concentration, irradiation dose, diluting solvent addition of inhibitor and addition of acid on the degree of grafting of the resins were investigated. The degree of grafting was found be heavily dependent upon the investigated parameters in a way that led to a close control over the composition of the resins. The introduction of polystyrene to LDPE resins and subsequent sulfonation was confirmed by FTIR spectral analysis. The water uptake and the ion exchange capacity of the obtained resins were evaluated. The thermal properties, thermal stability and mechanical stability of the obtained cation exchange resins were also studied using differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA), respectively. X-ray diffraction was also used to determine the structural changes took place in LDPE in correlation with the two-step procedure i.e. grafting and sulfonation and variation of the degree of grafting. The physical and chemical properties of the obtained resins we found to be strongly dependent on the degree of grafting. The obtained resins were found to have very good combination of properties compared to corresponding commercial sulfonated resins. It can be concluded that radiation grafted LDPE-g-PSSA resins have potential to be applied in water and waste water treatment. Moreover, radiation induced grafting is a convenient method to cation exchange resins.
机译：本项目的目的是使用辐射诱导接枝法制备和表征基于本地制造的低密度聚乙烯（LDPE）的阳离子交换树脂。通过将苯乙烯单体辐射诱导接枝到LDPE颗粒上，然后进行磺化反应以引入磺酸部分，来制备表示为LDPE-g-PSSA的树脂。研究了各种反应参数，如单体浓度，辐照剂量，稀释剂的稀释剂添加量和酸的添加量对树脂接枝度的影响。发现接枝程度在很大程度上取决于所研究的参数，从而导致对树脂组成的紧密控制。通过FTIR光谱分析证实了将聚苯乙烯引入LDPE树脂并随后进行磺化。评价所得树脂的吸水率和离子交换容量。还分别使用差示扫描量热法（DSC），热重分析法（TGA）研究了所得阳离子交换树脂的热性能，热稳定性和机械稳定性。 X射线衍射还用于确定LDPE中与两步操作相关的结构变化，即接枝和磺化以及接枝程度的变化。我们发现所获得的树脂的物理和化学性质在很大程度上取决于接枝程度。与相应的市售磺化树脂相比，发现获得的树脂具有非常好的性能组合。可以得出结论，辐射接枝的LDPE-g-PSSA树脂具有在水和废水处理中应用的潜力。而且，辐射诱导的接枝是阳离子交换树脂的方便方法。

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    Nasef Mohamed Mahmoud;

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  • 年度 2009
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  • 原文格式 PDF
  • 正文语种 {"code":"en","name":"English","id":9}
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