PMID- 36771976
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20230214
IS  - 2073-4360 (Electronic)
IS  - 2073-4360 (Linking)
VI  - 15
IP  - 3
DP  - 2023 Jan 28
TI  - Entrapment of Acridine Orange in Metakaolin-Based Geopolymer: A Feasibility 
      Study.
LID - 10.3390/polym15030675 [doi]
LID - 675
AB  - Few studies have explored the immobilization of organic macromolecules within the 
      geopolymer matrix, and some have found their chemical instability in the highly 
      alkaline geopolymerization media. The present work reports on the feasibility of 
      encapsulating the potentially toxic acridine orange (AO) dye in a metakaolin 
      based geopolymer while maintaining its structural integrity. The proper 
      structural, chemical, and mechanical stabilities of the final products were 
      ascertained using Fourier-transform infrared (FT-IR) spectroscopy, scanning 
      electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric (TGA/DTG), 
      and mechanical analyses, whereas the dye integrity and its stability inside the 
      geopolymer were investigated by the UV-Vis analysis. In addition, the 
      antimicrobial activity was investigated. The FT-IR and XRD analyses confirmed the 
      geopolymerization occurrence, whereas the TGA/DTG and mechanical (compressive and 
      flexural) strength revealed that the addition of 0.31% (AO mg/ sodium silicate L) 
      of AO to the fresh paste did not affect the thermal stability and the mechanical 
      properties (above 6 MPa in flexural strength and above 20 MPa for compressive 
      strength) of the hardened product. UV-Vis spectroscopy revealed that the dye did 
      not undergo chemical degradation nor was it released from the geopolymer matrix. 
      The results reported herein provide a useful approach for the safe removal of 
      toxic macromolecules by means of encapsulation within the geopolymer matrix.
FAU - D'Angelo, Antonio
AU  - D'Angelo A
AD  - Department of Engineering, University of Campania "Luigi Vanvitelli", Via Roma n. 
      29, 81031 Aversa, Italy.
AD  - Department of Environmental, Biological and Pharmaceutical Sciences and 
      Technologies, University of Campania "Luigi Vanvitelli", Via Vivaldi 43, 81100 
      Caserta, Italy.
FAU - Vertuccio, Luigi
AU  - Vertuccio L
AD  - Department of Engineering, University of Campania "Luigi Vanvitelli", Via Roma n. 
      29, 81031 Aversa, Italy.
FAU - Leonelli, Cristina
AU  - Leonelli C
AUID- ORCID: 0000-0001-8524-8715
AD  - Department of Engineering "Enzo Ferrari", University of Modena and Reggio Emilia, 
      Via P. Vivarelli 10, 41125 Modena, Italy.
FAU - Alzeer, Mohammad I M
AU  - Alzeer MIM
AD  - Fibre and Particle Engineering Research Unit, University of Oulu, Pentti Kaiteran 
      Katu 1, 90014 Oulu, Finland.
FAU - Catauro, Michelina
AU  - Catauro M
AUID- ORCID: 0000-0002-4448-6984
AD  - Department of Engineering, University of Campania "Luigi Vanvitelli", Via Roma n. 
      29, 81031 Aversa, Italy.
LA  - eng
PT  - Journal Article
DEP - 20230128
PL  - Switzerland
TA  - Polymers (Basel)
JT  - Polymers
JID - 101545357
PMC - PMC9919871
OTO - NOTNLM
OT  - FT-IR
OT  - UV-Vis
OT  - acridine orange
OT  - flexural and compressive strength
OT  - geopolymers
COIS- The authors declare no conflict of interest.
EDAT- 2023/02/12 06:00
MHDA- 2023/02/12 06:01
PMCR- 2023/01/28
CRDT- 2023/02/11 01:41
PHST- 2023/01/01 00:00 [received]
PHST- 2023/01/19 00:00 [revised]
PHST- 2023/01/25 00:00 [accepted]
PHST- 2023/02/11 01:41 [entrez]
PHST- 2023/02/12 06:00 [pubmed]
PHST- 2023/02/12 06:01 [medline]
PHST- 2023/01/28 00:00 [pmc-release]
AID - polym15030675 [pii]
AID - polymers-15-00675 [pii]
AID - 10.3390/polym15030675 [doi]
PST - epublish
SO  - Polymers (Basel). 2023 Jan 28;15(3):675. doi: 10.3390/polym15030675.