Temperature-Optimized Synthesis of SiO2-Reinforced N-(Alkyl)Acrylamide-Based Semi-IPN Hybrid Gels Functionalized with Methacrylic Acid Units

Birgül Kalkan, Merve Mocan, Nermin Orakdogen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In order to obtain a pH and temperature sensitive hybrids with a controlled structure, synthesis of N-(alkyl)acrylamide-based semi-interpenetrating polymer network (semi-IPN) reinforced with silica (SiO2) nanoparticles and functionalized with methacrylic acid units is carried out by optimizing the polymerization temperature. The study aims to understand the effect of polymerization temperature on the physical properties of semi-IPN hybrids. Changing preparation temperature between −30 and 23 °C leads to significant differences in physico-mechanical results, swelling tendency and adsorption ability, while silica nanoparticles strengthen hybrid walls, preventing their collapse during deswelling and providing rapid response. The hybrids prepared at higher temperatures are found to swell more and faster in water, while the lowest swelling is observed those prepared at 5 °C. The incorporation of SiO2 particles into copolymer structure via physical crosslinking with network chains enhances the elasticity. The effect of polymerization temperature on adsorption is investigated using methylene blue as a model dye. Increasing polymerization temperature increases the adsorption rate and shortens time to reach the equilibrium point, and adsorption efficiency increases when polymerization temperature is lowered. The results show that semi-IPN hybrids loaded with silica nanoparticles can be used as alternative and potential adsorbents in the treatment of industrial wastes.

Original languageEnglish
Article number2300006
JournalMacromolecular Reaction Engineering
Volume17
Issue number3
DOIs
Publication statusPublished - Jun 2023

Bibliographical note

Publisher Copyright:
© 2023 Wiley-VCH GmbH.

Funding

Financial support of this work from the Istanbul Technical University Research Fund (BAP, 43279) was gratefully acknowledged.

FundersFunder number
Istanbul Technical University Research Fund43279

    Keywords

    • elasticity
    • polymerization temperatures
    • silica
    • swelling

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