The dye adsorption and antibacterial properties of composite polyacrylamide cryogels modified with ZnO

A Comprehensive Review on Adsorption, Photocatalytic and Chemical Degradation of Dyes and Nitro-Compounds over Different Kinds of Porous and Composite Materials

“…Cryogels have a pore size in the 50–200 um range, facilitating dyes’ fast diffusion and adsorption. Polymeric materials have different functional groups, such as amide, carboxylic, sulfonic, hydroxyl, etc., which are mainly responsible for the adsorption of various dyes [ 47 ]. The adsorption of dye is also highly affected by temperature and pH.…”

“…The adsorption behavior happened on the surface or in the large pores of the cryogels, but it was hard for them enter into the small pores of the cryogels [ 49 ]. Cryogels have been extensively studied by many researchers for their adsorption of different cationic and anionic dyes [ 47 , 50 , 51 , 52 , 53 ]. From the extensive literature study, it is obvious that cryogels are very useful candidates for the adsorption and removal of various organic dyes and pollutants to ensure environmental stability, due to the macro-porous structure of cryogels and the cryogenic conditions which are mainly responsible for this macro-porosity.…”

Microgels as Smart Polymer Colloids for Sensing and Environmental Remediation

“…Poly(N-isopropylacrylamide) (PNIPAM)-based thermoresponsive microgels have emerged as one of the commendable entrants for the remediation of environmental pollution. 206,207 Such microgels serve as thermo-and pH-responsive absorbents for the elimination of highly toxic metal ions and poorly biodegradable organic dyes from water. 208,209 In general, several interactions such as hydrogen bonding, hydrophobic interaction, electrostatic interaction, and coordination bonding with metals simultaneously contribute in the heavy metal ions and dye adsorption process.…”

“…Poly­( N -isopropylacrylamide) (PNIPAM)-based thermoresponsive microgels have emerged as one of the commendable entrants for the remediation of environmental pollution. , Such microgels serve as thermo- and pH-responsive absorbents for the elimination of highly toxic metal ions and poorly biodegradable organic dyes from water. , In general, several interactions such as hydrogen bonding, hydrophobic interaction, electrostatic interaction, and coordination bonding with metals simultaneously contribute in the heavy metal ions and dye adsorption process. , Therefore, the adsorption capacity or elimination efficiency of PNIPAM microgel can be influenced by the two factors, (i) the consequence of various interaction forces between pollutants and microgels and (ii) volume phase transition temperature (VPTT). To address the first point, suitable functional PNIPAM-based microgels are designed and used to study the adsorption of various dyes and heavy toxic metal ions. The designed microgel has a negative surface charge arising from the backbone and end group functionality.…”

Etilen Oksit Sterilizasyonunun PEEK Bazlı Dental İmplantın Kimyasal Yapısı Üzerine Etkisi

“…Etilen oksit sterilizasyon işlemi sırasında polimerik malzeme sıcaklık, nem, basınç ve kimyasal gaza maruz bırakılır. Bu nedenle polimerin yapısında termal kararlılığını da etkileyen bazı fiziksel ve kimyasal değişiklikler meydana gelebilir (Inal et al, 2021). TGA, kütle değişimlerinin zamanın ve sıcaklığın bir fonksiyonu olarak tespit edildiği bir termal analiz tekniğidir (Bozkaya et al, 2022;Gün Gök et al, 2021 basamağın bozunması dekarboksilasyon, dekarbonilasyon ve dehidrasyon süreçlerini içerir ve bozunma ürünlerinin başlıcaları fenol grupları, karbondioksit ve karbonmonoksit molekülleridir (Naffakh et al, 1999;Ramgobin et al, 2020).…”