通过无皂乳液聚合制备的硫醇官能化聚合物亚微米颗粒及其在水中的铅离子吸附,Journal of Applied Polymer Science

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通过无皂乳液聚合制备的硫醇官能化聚合物亚微米颗粒及其在水中的铅离子吸附
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-05-01 , DOI: 10.1002/app.49312
Lingxiao Li ₁ , Lu Han ₁ , Xueyan Liu _{1,

2} , Jianhong Xu ₂ , Chengyou Kan ₁

Affiliation

氧化，添加硫醇烯点击和抑制硫醇使得很难通过自由基聚合制备含硫醇的颗粒。P（MMA- co- PDSECAE）亚微米颗粒使用甲基丙烯酸甲酯（MMA）和新合成的可聚合的2-（（（2- [吡啶基-2-基二硫烷基]乙氧基）羰基）氨基）丙烯酸乙酯（PDSECAE）作为单体（SPs）首先通过无皂乳液聚合制备，其中巯基以吡啶基二硫键的形式受到保护，不受副反应的影响。硫醇官能化的P（MMA- co- PDSECAE）-SH SPs是通过用二硫苏糖醇（DTT）对SP进行后处理而获得的，然后用于吸附Pb ²⁺在水里。结果表明，在制备这些SP时，引发剂类型，初始pH和PDSECAE用量对聚合反应和所得乳液的稳定性以及P的胶体性质和硫醇基含量起着重要作用。（MMA- co- PDSECAE）-SH SP。的P（MMA- CO -PDSECAE）-SH的SP有近10倍的Pb ²⁺的吸附能力比相应的PMMA的SP或P（MMA- CO优化实验条件下-PDSECAE）的SP，和Pb的吸附能力²⁺随着PDSECAE剂量和DTT减少时间的增加而增加。由于较大的比表面积和易于制备的过程，P（MMA- co‐PDSECAE）‐SH SPs在重金属离子吸附方面具有潜在的应用价值。

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Thiol functionalized polymer submicron particles prepared by soap‐free emulsion polymerization and their adsorption of lead ions in water

Oxidization, thiol‐ene click addition, and inhibition of thiols make it hard to prepare thiol‐containing particles from free radical polymerization. Using methyl methacrylate (MMA) and a newly synthesized polymerizable 2‐(((2‐[pyridin‐2‐yldisulfanyl]ethoxy)carbonyl)amino) ethyl acrylate (PDSECAE) as monomers, the P(MMA‐co‐PDSECAE) submicron particles (SPs) were first prepared by soap‐free emulsion polymerization, in which the thiol was protected in the form of pyridyl disulfide group from side reactions. The thiol functionalized P(MMA‐co‐PDSECAE)‐SH SPs were obtained by post‐treating the SPs with dithiothreitol (DTT), and then used to adsorb Pb²⁺ in water. Results showed that in the preparation of these SPs, the initiator type, the initial pH and the PDSECAE dosage played an important role in the stability of polymerization and the resulted emulsions, and the colloid properties as well as the content of thiol groups of the P(MMA‐co‐PDSECAE)‐SH SPs. The P(MMA‐co‐PDSECAE)‐SH SPs had nearly 10 times greater Pb²⁺ adsorption capacity than the corresponding PMMA SPs or P(MMA‐co‐PDSECAE) SPs under optimized experimental conditions, and the adsorption capacity of Pb²⁺ increased with PDSECAE dosage and the DTT reduction time. Due to the relatively large specific surface area and easy preparation process, the P(MMA‐co‐PDSECAE)‐SH SPs have potential application value in the adsorption of heavy metal ions.

更新日期：2020-05-01

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