A new route to obtain PVDF/PANI conducting blends

ResumoNeste trabalho partículas de níquel foram incorporadas através da mistura física do pó resultante da mistura PVDF/Pani obtido por síntese química. Filmes homogêneos foram obtidos através da prensagem a temperatura de 180°C. A partir dos resultados pode-se notar alterações favoráveis e desfavoráveis nas propriedades do compósito após a incorporação e como estas tornam-se dependentes da incorporação. Os resultados de difratometria apresentaram picos característicos tanto da fase α da matriz polimérica e das partículas de níquel, e juntamente com as analises térmicas, que não há alteração na estrutura conformacional e a configuracional. Mesmo apresentando uma boa estabilidade térmica a incorporação indica que além da presença do polímero condutor como o aumento de partículas são prejudiciais às propriedades mecânicas finais da amostra. As micrografias apresentam as partículas de forma dispersas ao longo do filme e determinantes para os valores de condutividade elétrica e obtenção de uma fase magnética. Palavras-chave: polianilina, poli(fluoreto de vinilideno), níquel, compósito, propriedades magnéticas. AbstractIn this work nickel particles were incorporated by physically mixing of resulting powder blends of PVDF/Pani, obtained by chemical synthesis. Homogeneous films were obtained by hot pressing at 180 °C. From the results could be noted favorable and unfavorable changes in the properties of composites after incorporation and how this become dependent of the incorporation. The results of diffraction showed the characteristic peaks of both the α phase of the polymer matrix and the nickel particles, and with thermal analysis, no change in the conformational structure and configurational. Even with a good thermal stability incorporating, indicates that besides the presence of the conducting polymer as the increase of particles are harmful to the final mechanical properties of the sample. Micrographs showed particles dispersed throughout the film and determinants to electrical conductivity values and achieving a magnetic phase. Keywords: polyaniline, poly (vinylidene fluoride), nickel, composite, magnetic property. IntroduçãoTradicionalmente ao estudar se magnetismo e suas propriedades, em particular o ferromagnetismo, está se estudando, por exemplo, elementos inorgânicos como ferro, níquel, cobalto, ligas, cerâmicas e óxidos, os quais apresentam o comportamento magnético, e também estudos quando estes elementos são incorporados em matrizes poliméricas na forma extrínseca [1][2][3] . Porém a exploração de materiais orgânicos com a descoberta dos polímeros intrinsecamente condutores trouxe uma nova gama de questões no campo da pesquisa como novas propriedades magnéticas e óticas além da possibilidade de materiais mais leves, com alta condutividade e flexibilidade [2][3][4][5][6][7][8][9] . Assim a investigação do comportamento magnético dos polímeros condutores intrínsecos, se inclui o estudo de seus elementos constituintes, como carbono, hidrogênio, nitrogênio, anéis aromáticos e a própria conjunção e conformaç...

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“…O compósito foi obtido pela síntese da polianilina em uma solução de PVDF dissolvido em N-N-dimetilformamida (DMF) [30] .…”

Section: Materiais E Sínteseunclassified

“…Neste trabalho propõe a incorporação de maneira extrínseca de partículas metálicas, na mistura PVDF/Pani [30] para facilitação do comportamento magnético, além de como esta incorporação, pode influenciar nas demais propriedades do material.…”

Section: Introductionunclassified

Preparação e caracterização do compósito PVDF/Pani com partículas de níquel

et al. 2017

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“…This class of polymers have been widely investigated for different kinds of applications, including chemical, physical and biological sensors, actuators, a large number of electronic and optoelectronic devices, anti-corrosive coating, biosensors, electrochromic devices, as electrodes for batteries,in robotics, biomimetics and smart structures [4][3] [2][5] [6] [7]. In the biomedical field this polymers are used in the development of artificial muscles, the controlling of drug release and as a stimulus for the regeneration of nerves [8].…”

Section: Introductionmentioning

confidence: 99%

“…It is easily synthesized chemically and electrochemically, easily doped by protonic acids, chemically stable at room temperature conditions, high conductivity, and low cost [4][10] [11]. The aniline polymers also have controllable electrical conductivity, environmental stability and interesting redox properties associated with the nitrogen chains.…”

Section: Introductionmentioning

confidence: 99%

Study of the effect of synthesis parameters in the electrical conductivity of the composite poly (vinylidene fluoride) / polyaniline

et al. 2017

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Estudo do efeito dos parâmetros de síntese na condutividade elétrica do compósito fluoreto de polivinilideno / polianilinaStudy of the effect of synthesis parameters in the electrical conductivity of the composite poly (vinylidene fluoride) / polyaniline ABSTRACTThe electroactive polymers have been the subject of many studies in the last decade, mainly because its unique properties. They are used in composite structures, which allow its application in many fields, as for example, sensors and artificial muscles. The electrical properties of these composites are influenced by the doping state of the electroactive polymer, which is controlled during its synthesis process. Therefore, this work aimed to evaluate how the synthesis parameters influence the electrical conductivity of the composite PANI/PVDF.The synthesis parameters evaluated were the concentrations of monomer, initiator and dopant, and the synthesis time. PANI was obtained by chemical polymerization in a solution containing PVDF and the solvent DMF. To evaluate possible changes in the chemical structure of the composite, the samples were submitted to FT-IR and XRD analysis. It was possible to conclude that the parameters relative to the production of PANI directly influence in the electrical conductivity of the composite. So, the sample produced with major quantities of monomer, initiator and dopant were statistically significant to increase the electrical property of the composite.

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“…Several approaches are documented, based on the simultaneous preparation of PANI and the counterpart in the same medium [23,24] or on the dissolution/dispersion of the counterpart [25][26][27][28][29] or of PANI [30] in a suitable solvent, followed by polymerization of the other phase. In all these cases, the final materials did not present acceptable mechanical and electrical properties.…”

Section: Introductionmentioning

confidence: 99%

A new route for the preparation of flexible skin–core poly(ethylene-co-acrylic acid)/polyaniline functional hybrids

Scaffaro

Dispenza

et al. 2011

Reactive and Functional Polymers

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a b s t r a c tSurface modification of polymeric films is a way to obtain final products with high performance for many specific and ad hoc tailored applications, e.g. in functional packaging, tissue engineering or (bio)sensing. The present work reports, for the first time, on the design and development of surface modified ethyleneacrylic acid copolymer (EAA) films with polyaniline (PANI), with the aim of inducing electrical conductivity and potentially enable the electronic control of a range of physical and chemical properties of the film surface, via a new ''grafting from'' approach. In particular, we demonstrate that PANI was successfully polymerized and covalently grafted onto flexible EAA substrates, previously activated. The final hybrid materials and the corresponding intermediates were fully characterized via FTIR, XPS, SEM-EDAX, mechanical and electrical tests. The mechanical properties of the films are not detrimentally affected by each treatment step, while a significant increase in electrical conductivity was achieved for the new hybrid materials.

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A new route to obtain PVDF/PANI conducting blends

Cited by 47 publications

References 28 publications

Preparação e caracterização do compósito PVDF/Pani com partículas de níquel

Preparação e caracterização do compósito PVDF/Pani com partículas de níquel

Study of the effect of synthesis parameters in the electrical conductivity of the composite poly (vinylidene fluoride) / polyaniline

A new route for the preparation of flexible skin–core poly(ethylene-co-acrylic acid)/polyaniline functional hybrids

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