Abordagem histórica a respeito de filmes de Langmuir e Langmuir-Blodgett até o início do século 20
Data
2022-02-02
Autores
Weisheimer, Luiz Eduardo Melo 
Orientadores
Ceridório, Lucinéia Ferreira
Tipo
Trabalho de conclusão de curso
Título da Revista
ISSN da Revista
Título de Volume
Resumo
Uma substância anfifílica espalhada na interface ar-água, pode formar um filme muito
fino na superfície da água, muitas vezes da espessura de uma só molécula, denominados filmes
de Langmuir. As monocamadas de Langmuir, ainda, podem ser transferidas a um substrato
sólido formando o filme de Langmuir-Blodgett. Os estudos dos filmes de Langmuir e
Langmuir-Blodgett é de grande interesse, pois devido às suas propriedades permitem uma série
de aplicações, principalmente com compostos de relevância biológica. Consta na literaturaque
o espalhamento de óleo à superfície da água era conhecido por povos antigos, que o associavam
ao efeito calmante de águas agitadas, porém, experimentos descritos há mais de 200 anos deram
origem à história científica dos filmes à superfície da água. Estudos divulgados no final do
século XIX trouxeram uma melhor compreensão dos filmes e, anos mais tarde, Irving Langmuir
se interessa pelos resultados e esclarece uma série de conceitos envolvendo essa área, dando
origem ao termo Filmes de Langmuir. Considerando a riqueza da história desses filmes, que
englobam uma diversidade de conceitos científicos, especialmente em química e física e, em
paralelo, a atual relevância em pesquisas básicas e desenvolvimento de tecnologia, este trabalho
teve como objetivo realizar uma pesquisa exploratória em busca de fontes primárias e
segundarias sobre a história dos filmes de Langmuir e Langmuir-Blodgett. A partir da leitura
de diversos artigos encontrados em bases de dados e periódicos, sintetizamos as informações
que compõem história da Química de Superfícies desses filmes a ser abordada no ensino de
química, a partir de um recorte que possibilita tratar os fatos históricos considerando a trajetória
do conhecimento e o entendimento do mundo científico como um conjunto de ideias,
experimentos e estudos, ao lado da importância da comunicação, divulgação e
compartilhamento de ideias na área. O texto produzido nesse trabalho em paralelo com as
considerações a respeito de história da ciência e o ensino podem trazer contribuições a
professores e estudantes para tratarem o tema em sala de aula.
An amphiphilic substance spread across the airwater interface can form a very thin film on the water surface, often as thick as a single molecule, called Langmuir films. The Langmuir monolayers can also be transferred to a solid substrate forming the LangmuirBlodgett film. The studies of Langmuir and LangmuirBlodgett films are of great interest, because due to their properties they allow a series of applications, mainly with biologically relevant compounds. It is reported in the literature that the spreading of oil to the surface of the water was known by ancient peoples, who associated it with the calming effect of rough water, however, experiments described over 200 years ago gave rise to the scientific history of films on the surface of the water. Studies published in the late nineteenth century brought a better understanding of films and, years later, Irving Langmuir became interested in the results and clarified a series of concepts involving this area, giving rise to the term films by Langmuir. Considering the rich history of these films, which encompass a diversity of scientific concepts, especially in chemistry and physics and, in parallel, the current relevance in basic research and technology development, this work aimed to carry out an exploratory research in search of sources primaries and secondaries about the history of Langmuir's films. From the reading of several articles found in databases and periodicals, we building text with the history that can be treated in the teaching of Surface Chemistry, based on a history that makes it possible to deal with historical facts in chemistry teaching, considering the trajectory of knowledge and understanding of the scientific world as a set of ideas, experiments, studies alongside the importance of communication, dissemination and sharing in the area. The text produced in this work in parallel with the considerations about the history of science and teaching brings contributions and students to address the topic teachers in the classroom.
An amphiphilic substance spread across the airwater interface can form a very thin film on the water surface, often as thick as a single molecule, called Langmuir films. The Langmuir monolayers can also be transferred to a solid substrate forming the LangmuirBlodgett film. The studies of Langmuir and LangmuirBlodgett films are of great interest, because due to their properties they allow a series of applications, mainly with biologically relevant compounds. It is reported in the literature that the spreading of oil to the surface of the water was known by ancient peoples, who associated it with the calming effect of rough water, however, experiments described over 200 years ago gave rise to the scientific history of films on the surface of the water. Studies published in the late nineteenth century brought a better understanding of films and, years later, Irving Langmuir became interested in the results and clarified a series of concepts involving this area, giving rise to the term films by Langmuir. Considering the rich history of these films, which encompass a diversity of scientific concepts, especially in chemistry and physics and, in parallel, the current relevance in basic research and technology development, this work aimed to carry out an exploratory research in search of sources primaries and secondaries about the history of Langmuir's films. From the reading of several articles found in databases and periodicals, we building text with the history that can be treated in the teaching of Surface Chemistry, based on a history that makes it possible to deal with historical facts in chemistry teaching, considering the trajectory of knowledge and understanding of the scientific world as a set of ideas, experiments, studies alongside the importance of communication, dissemination and sharing in the area. The text produced in this work in parallel with the considerations about the history of science and teaching brings contributions and students to address the topic teachers in the classroom.