Banca de DEFESA: ADAIR DIVINO SILVA BADARO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : ADAIR DIVINO SILVA BADARO
DATA : 02/08/2019
HORA: 10:00
LOCAL: A definir
TÍTULO:

Plasma surface modification of polyester to improve wash fastness of permethrin repellent. 

PALAVRAS-CHAVES:

Plasma, Polyester, Permethrin, Insect Repellent, Functional Textile.

PÁGINAS: 113
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Química
SUBÁREA: Tecnologia Química
ESPECIALIDADE: Têxteis
RESUMO:

Throughout the history of mankind, textiles performed various functions from protection to fashion. Globalization has had a big influence on the evolution of functional textiles for health protection. One of the effects of globalization is the demand for prevention of mosquito bites, which can cause an unpleasant sensation and transmit vector disease such as dengue, malaria and other diseases to mankind. For the WHO (World Health Organization), vector-borne diseases account for about 17% of all infectious diseases, leading to more than 1 million deaths each year. The lack of vaccines and methods to treat diseases makes sting prevention the most effective health protection. The application of mosquito repellents on the skin has limited protection effect. Based on this the WHO advises to treat the fabrics of clothing with repellent agents, as it is a very efficient way of avoiding mosquito bites. The substance that has been shown most efficiently in the mortality of disease transmitters is permethrin, which is an odorless and biodegradable synthetic insecticide derived from the plant Chrysanthemum cinerariifolium. It is the only one in its use as contact insecticide neural toxicity and as insect repellent and low toxicity in mamifers. The polyester fabric was the fiber used because the synthetic fibers are more than 55% of the products of the textile industry and exceed the production of natural fibers, in addition to the properties of high modulus and strength, stiffness, elasticity, resistance to wrinkling and abrasion , relatively low cost and ease of recycling. based on the low affinity between polyester and permethrin the process of surface modification by plasma was adopted, therefore, it is a clean and innovative technique to improve the quality of the product. The treatment of textile plasma is obtained by modifying the surface without modifying the basic properties of the materials. The process was carried out with the gases O², N² and mixture of 70/30 O² / N². With the objective of making chemical and physical changes in the surface of the textile material. Then a solution of 200g / l of permethrin in foulard was applied, followed by drying and polymerization. Part of the samples will be washed 10, 35 and 60 times for comparison with untreated samples on the efficiency of the process with respect to the anchoring of permethrin in the polyester fibers. Analyzes such as the XPS will evaluate the change in the chemical chains of the material, the FTIR will evaluate the maintenance of the permethrin in the fibers of the samples through the characteristic peaks. The SEM will evaluate the surface of the material. With this data it will be possible to identify and control each process and what its interference on the textile material.

MEMBROS DA BANCA:
Presidente - 2614274 - MICHELLE CEQUEIRA FEITOR
Interno - 2550377 - THERCIO HENRIQUE DE CARVALHO COSTA
Externo à Instituição - IVAN ALVES DE SOUZA
Externo à Instituição - RUBENS CAPISTRANO DE ARAUJO