Banca de DEFESA: LUIZ FELIPE DA HORA
Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.STUDENT : LUIZ FELIPE DA HORA
DATE: 29/01/2021
TIME: 14:00
LOCAL: Remotamente pelo Google Meet
TITLE:
Obtaining nanolatics via semi-continuous emulsion polymerization and its application as a surface modifier in dyeing with soy protein fibers.
KEY WORDS:
Semicontinuous-emulsion polymerization, Nanolatex, Soybean protein fiber, Basic red 46.
PAGES: 72
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Química Orgânica
SPECIALTY: Polímeros e Colóides
SUMMARY:
In this work, nanolatexes were produced by semicontinuous emulsion polymerization. Parameters such as monomeric composition, initiator and surfactant type were investigated in order to obtain a nanolatex with small particle size and high functionalized surface area. Afterwards, the nanolatex was used as a binder to improve the dyeing process of soybean protein fiber (SBF) fabric with a cationic dye (Basic Red 46). The best monomer composition was the one with the following ratio in mass BA/MMA/MAA (5:4:1). The best performance as an initiator was presented by APS, and the SDS had the best performance as a surfactant. The polymeric particles were analyzed by several techniques such as: gravimetry, DLS, SEM, TEM, FTIR, ELS, tensiometry, and conductometry titration. Nanolatexes with particle size as small as 29 nm and surface charge up to 93.8 μC/cm2 were obtained through emulsion polymerization technique. The presence of nanolatex on the surface of the soybean fiber was verified by FTIR and TGA analysis. The nanolatex efficiency as an additive to modify the dyeing process was evaluated by colorimetric data using the Kubelka-Munk equation. Preliminary tests showed that the fabrics functionalized with nanolatex had an increase of up to 13% in color intensiity, showing its ability to be used as surface additive in the dyeing proccess.
BANKING MEMBERS:
Externo ao Programa - 2941160 - JOSE HERIBERTO OLIVEIRA DO NASCIMENTO
Presidente - 1198847 - JOSE LUIS CARDOZO FONSECA
Externa ao Programa - 2212519 - JULIANA DE SOUZA NUNES
Interna - 1149440 - ROSANGELA DE CARVALHO BALABAN
Externo à Instituição - ZILVAM MELO DOS SANTOS - UFERSA