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Intercalation Characteristics of Montmorillonite Modified with Poly(2-n-alkyl-2-oxazoline)s
Macromolecules ( IF 5.1 ) Pub Date : 2024-08-26 , DOI: 10.1021/acs.macromol.4c00291 Marek Pribus 1 , Luboš Jankovič 1 , Valériá Bizovská Kureková 1 , Martin Barlog 1 , Jana Madejová 1
Macromolecules ( IF 5.1 ) Pub Date : 2024-08-26 , DOI: 10.1021/acs.macromol.4c00291 Marek Pribus 1 , Luboš Jankovič 1 , Valériá Bizovská Kureková 1 , Martin Barlog 1 , Jana Madejová 1
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Poly(2-oxazoline)s (POxs) are nonionic polymers suitable for different bioapplications. Composites of montmorillonite (Mnt) and poly(2-methyl-2-oxazoline) (PMeOx), poly(2-ethyl-2-oxazoline) (PEtOx), and poly(2-propyl-2-oxazoline) (PPrOx) were prepared for the first time, and the effect of polymer loadings and the side chain length on the adsorption and structural characteristics was examined. Adsorption isotherms of polymers revealed a sharp increase in adsorption at low polymer loadings. When the surface of Mnt was saturated with POxs, a plateau not changing with the loading of the polymer appeared. The highest adsorption capacity was found for PMeOx (4.15 mmol g–1) followed by PEtOx (3.86 mmol g–1) and PPrOx (3.14 mmol g–1). The interlayer space of Mnt gradually increased with increasing POxs content from 0.5 to 6.0 mmol g–1. No further changes were observed at loadings above 6.0 mmol g–1. The intensities of the bands related to the vibrations of the C═O and CH3 and CH2 groups increased with increasing amounts of polymers. A slight shift of the band position reflected the transition from disordered (cis conformers) to more ordered (trans conformers) polymer arrangement.
中文翻译：
聚(2-正烷基-2-恶唑啉)改性蒙脱土的插层特性
聚(2-恶唑啉) (POx) 是适用于不同生物应用的非离子聚合物。蒙脱土（Mnt）和聚（2-甲基-2-恶唑啉）（PMeOx）、聚（2-乙基-2-恶唑啉）（PEtOx）和聚（2-丙基-2-恶唑啉）（PPrOx）的复合材料首次制备，并考察了聚合物负载量和侧链长度对吸附和结构特性的影响。聚合物的吸附等温线显示，在低聚合物负载量下，吸附急剧增加。当Mnt表面被POxs饱和时，出现不随聚合物负载量变化的平台。 PMeOx (4.15 mmol g –1 ) 的吸附容量最高，其次是 PEtOx (3.86 mmol g –1 ) 和 PprOx (3.14 mmol g –1 )。随着POxs含量从0.5到6.0 mmol g –1的增加，Mnt的层间距逐渐增大。当负载量高于 6.0 mmol g –1时，没有观察到进一步的变化。与C=O和CH 3和CH 2基团的振动相关的能带强度随着聚合物量的增加而增加。带位置的轻微移动反映了从无序（顺式构象异构体）到更有序（反式构象异构体）聚合物排列的转变。
更新日期：2024-08-26
中文翻译：
聚(2-正烷基-2-恶唑啉)改性蒙脱土的插层特性
聚(2-恶唑啉) (POx) 是适用于不同生物应用的非离子聚合物。蒙脱土（Mnt）和聚（2-甲基-2-恶唑啉）（PMeOx）、聚（2-乙基-2-恶唑啉）（PEtOx）和聚（2-丙基-2-恶唑啉）（PPrOx）的复合材料首次制备，并考察了聚合物负载量和侧链长度对吸附和结构特性的影响。聚合物的吸附等温线显示，在低聚合物负载量下，吸附急剧增加。当Mnt表面被POxs饱和时，出现不随聚合物负载量变化的平台。 PMeOx (4.15 mmol g –1 ) 的吸附容量最高，其次是 PEtOx (3.86 mmol g –1 ) 和 PprOx (3.14 mmol g –1 )。随着POxs含量从0.5到6.0 mmol g –1的增加，Mnt的层间距逐渐增大。当负载量高于 6.0 mmol g –1时，没有观察到进一步的变化。与C=O和CH 3和CH 2基团的振动相关的能带强度随着聚合物量的增加而增加。带位置的轻微移动反映了从无序（顺式构象异构体）到更有序（反式构象异构体）聚合物排列的转变。
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