Reaction of Activated Geopolymers in Acid Medium and Application of Polyaniline as a Conductor of Electricity


  • Fabíola da Silveira Maranhão
  • Nathália da Silva do Carmo dos Santos
  • Cintia Patricia Santos da Paixão
  • Sergio Thode Filho IFRJ
  • Diganta B. Das
  • Fernando Gomes de Souza Junior Universidade Federal do Rio de Janeiro



Geopolymers, Acid route, Polyaniline, Metakaolin, Conductivity, Phosphoric acid


In 1972, the French chemist Joseph Davidovits named a new class of inorganic polymers, the geopolymers. This was due to his search for flame-resistant materials that were harmless to the environment and human health. These materials were produced by reacting aluminosilicates in alkaline solution. However, over time, it was discovered that it was possible to produce the same material via an acidic route, using phosphoric acid. In this sense, this work aimed the production of geopolymers in acid medium and the insertion of 10%, 25% and 50% of conductive charge to produce a geopolymer capable of conducting electric charge. To verify the conductive capacity of the material, the resistivity test, and Thermogravimetric Analysis (TGA) were performed to investigate the loss of mass as a function of temperature. The tests were performed in triplicates and the data obtained were analyzed by ANOVA and Tukey method and the results showed that the values were different from each other, indicating the domination of resistivity with increasing polyaniline concentration.

Author Biography

Fernando Gomes de Souza Junior, Universidade Federal do Rio de Janeiro

Associate (III) Prof. Fernando Gomes: Expertise focused in the use of renewable resources and nanocomposites in sensors, drug delivery and environmental recovery. Coordination of more than ten research projects with financial support from Brazilian government sponsoring agencies. Published 160 scientific articles plus 13 accepted for publication during 2021. Published 8 books. Among them,3 chemistry books in Portuguese and 3 books about Biopolymers in English. He has published more than two hundred papers in Conferences and Scientific meetings. Co-convener of the Sixth International Conference on Natural Polymers, Biopolymers and biomaterials: Applications from macro to nanoscale (, Chairman of the Fifth International Conference on Natural Polymers, Biopolymers and biomaterials: Applications from macro to nanoscale ( and Chaiman of the 1st Brazilian Conference on Design of Experiments and Data Analysis ( Supervisor of 128 undergraduate students; 29 M.Sc. students, 14 Ph.D. students and 6 Post Doc. Nowadays I am the supervisor of 11 undergraduate students; 7 M.Sc. students, 10 Ph.D. students and 3 Post Doc. Associate Editor of the MedCrave Online Journal (MOJ) Polymer Science (ISSN: 2574-9773) since 2017. Editor of the Academic Journal of Polymer Science (ISSN: 2641-8282), since 2018. Member of the Editorial Board of Composite Interfaces (ISSN: 0927-6440), since 2021. Member of the editorial board of Current Applied Polymer Science (ISSN 2452-2716) since 2016 and Editor-in-Chief of Current Applied Polymer Science (ISSN 2452-2716) since 2020. Professor Gomes has founded the Brazilian Journal of Experimental Design, Data Analysis and Inferential Statistics in 2021, acting as its 1st Editor-in-Chief. Awardedtwice as Young Scientist of Rio de Janeiro State (FAPERJ 2011 and 2014), Chair Professorship on Nanoscience and Nanotechnology - Mahatma Gandhi University – India (2018), member of Post Graduate Program in Science and Technology of Polymers of the Macromolecules Institute / Federal University of Rio de Janeiro (UFRJ) since 2008, member of Post Graduate Program in Civil Engineering (COPPE/UFRJ) between 2015-2019 and member of Post Graduate Program in Nanotechnology (COPPE/UFRJ) since 2019.