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Filmes automontados de nanopartículas de magnetita e polipirrol na determinação analítica de metilparabeno
(Universidade Federal de São Carlos, 2020-02-20)
Parabens are esters derived from para-hydroxybenzoic acid used as antimicrobials and bactericides in cosmetics, personal hygiene and cleaning products, food and medicines. Side effects have been observed due to the ...
Efeitos da nitretação a plasma e do filme de carbono amorfo (a-C:H) aplicado ao aço 1020 na resistência ao desgaste em alumínio AA 3104
(Universidade Federal de São Carlos, 2020-04-03)
The AA 3104 aluminum is widely used as packaging for food storage, as it is a versatile alloy with easy mechanical conformation, however, it causes high wear to the cutting knife due to friction during the packaging ...
Estudo da resistência ao desgaste e corrosão do aço AISI 4340 com tratamento a plasma de nitrocementação, revestimento DLC e multicamada (nitrocementação + DLC)
(Universidade Federal de São Carlos, 2020-03-02)
Duplex treatments are performed seeking out to promote additional tribological property
for a material, for example, diamond-like carbon (DLC) films deposited on AISI 4340
steel nitrocarburizing surfaces. DLC films have ...
Microplásticos: impacto ambiental de polímeros fotodegradados
(Universidade Federal de São Carlos, 2020-02-03)
Plastics have been studied for their environmental impact, since when discarded in the environment they do not disappear. Over time they degrade and fragment into smaller pieces, reaching the microscale. When exposed to ...
Síntese de heteroestruturas TiO2/BiVO4 via "blocos de construção" para aplicação em fotocatálise heterogênea
(Universidade Federal de São Carlos, 2020-03-06)
Two environmental problems of great importance today are the release of organic contaminants in aquatic bodies and Carbon Dioxide (CO2) in the atmosphere. The first problem is associated with increased industrial and ...
Obtenção de nanocelulose a partir da funcionalização da celulose por oxipropilação
(Universidade Federal de São Carlos, 2020-03-27)
The present study aimed to obtain functionalized nanocellulose through the oxypropylation reaction. Thereunto, the cellulose was submitted to an initial activation step with a sodium hydroxide solution, and then the reaction ...
Desenvolvimento e caracterização de filmes poliméricos de amido de milho com incorporação de fibras de bagaço de cevada
(Universidade Federal de São Carlos, 2020-03-25)
Interest in the use of starch for biodegradable films is growing due to being a natural, renewable, abundant and low cost source. However, starch films generally have low values of mechanical properties. Thus, this work ...
Viabilidade de queima de casca de eucalipto em fornos de cimento
(Universidade Federal de São Carlos, 2020-07-31)
Cement factories, have rotary kilns that use fuels, either fossil, coprocessed or renewable (biomass) and are capable of absorbing all the ash produced during the process, as well as allowing the raw material to be adapted ...
Obtenção de nanocelulose bacteriana de kombucha
(Universidade Federal de São Carlos, 2020-03-24)
In the last years, sustainable materials that provide less environmental impact are gaining special attention. In this context, cellulose, a natural and abundant polymer from several renewable vegetable and microbial ...
Comparação do método químico e método a plasma no preparo de nanocompósitos de prata e nanocelulose
(Universidade Federal de São Carlos, 2020-04-02)
Cellulose, being a biodegradable material, flexible and with good mechanical resistance, has been attracting great interest in studies, as it is a biopolymer from a renewable source and widely available in nature. It can ...