Novel highly hydrophilic organic/inorganic composites based on polyacrylamide and silica: synthesis strategy, structure and swelling behaviour
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Date
2019-06-12
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The Polymer Society, Taipei 2019
Abstract
A series of novel hydrophilic organic-inorganic composites (OIC) with enhanced sorption properties were synthesized by onepotsynthesistechnique-insituradicalpolymerizationofacrylamide(AM)andhydrolyticpolycondensationofsodiumsilicatein aqueous solution. Formation of mixed organic-inorganic polyacrylamide (PAM)/SiO2 phase has been detected by FTIR spectroscopy (appropriate changes in H-bonds network structure of PAM) and DSC analysis (dramatic decreasing glass temperature ofPAM).AdditivedecreasingofmasslossofOICwithincreasingofSiO2 contentisexplainedbytheincreasingofPAM-content in mixed PAM/SiO2 phase on the interface of organic and inorganic phases. The formation of SiO2 aggregates with different dispersity,which,intheirturn,formsubmicronstructuresincompositeswithSiO2 contentmorethan15wt.%wasobservedfrom SEMdata.StructurizationofOICresultedintheenhancedsorptioncharacteristics(swellingcapacityoftheOICreaches2730%). SorptionkineticcurvesobtainedbothinisothermicandisochoricregimesdemonstratethattheswellingprocessofOICislimited by relaxation of PAM chains and can be described by sorption mechanism of Type II.
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Keywords
Composite, Hydrogel, Swellingpressurekinetics, Structure-propertyrelations
Citation
Slisenko, O., & Mamunya, Y. (2019). Novel highly hydrophilic organic/inorganic composites based on polyacrylamide and silica: Synthesis strategy, structure, and swelling behaviour. Journal of Polymer Research, 26(164), 1–9. The Polymer Society, Taipei. https://doi.org/10.1007/s10965-019-1823-4