A simple process to tune wettability of pectin-modified silanized glass

Autor(es)

Nascimento, Jonatas U. ^[1] ; Zambuzi, Giovana C. ^[1] ; Ferreira, Joao O. ^[1] ; Paula, Julia H. ^[1] ; Ribeiro, Tatiana S. ^[1] ; Souza, Adriano L. ^[1] ; Dreiss, Cecile A. ^[2] ; Silva, Lucimara L. ^[3] ; Francisco, Kelly R. ^[1]

Afiliação do(s) autor(es)

^[1] Fed Univ Sao Carlos UFSCar, Dept Nat Sci Math & Educ, Rodovia Anhanguera Km 174, BR-13604900 Araras, SP - Brazil

^[2] Kings Coll London, Inst Pharmaceut Sci, Franklin Wilkins Bldg, 150 Stamford St, London SE1 9NH - England

^[3] Fed Technol Univ Parana UTFPR, Chem Engn Course, Estr Pioneiros 3131, BR-86036370 Londrina, PR - Brazil

• Tipo de documento: Artigo Científico
• Fonte: COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS; v. 577, p. 67-74, SEP 20 2019.
• Citações Web of Science: 0

Resumo

Layer-by-layer (LbL) techniques are strategically important to obtain highly organized and oriented materials. Understanding film formation and nanoscale structures at the interface is important for many biological, industrial and technological processes. We describe a LbL film formed from a silanized glass surface coated with high-methoxyl pectin. The chemical composition of the surfaces was characterized by X-ray photoelectron spectroscopy (XPS); surface topology and chemistry were analyzed by Atomic Force Microscopy coupled with Infrared Spectroscopy (AFM-IR). Varying pH and concentration of the casting pectin solutions results in surfaces with different wettability, measured by contact angle. At high pH, pectin chains are highly charged, resulting in chain repulsions, poor coverage and low wettability due to exposure of the silane chains. At higher concentration, chains extend from the surface and wettability increases. This work establishes a facile route towards value-added materials from pectin, establishing clear links between wettability, nanostructure and composition at the interface. (AU)

• Processo FAPESP: 17/20006-4 - Obtenção de nanofibras de pectina aplicadas à liberação modificada de hidroxicloroquina
• Beneficiário: Kelly Roberta Francisco Muruci de Paula
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/12146-3 - Estudo dos mecanismos de liberação modificada da hidroxicloroquina mobilizada em pectina
• Beneficiário: Giovana Cristina Zambuzi
• Linha de fomento: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 15/24136-4 - Reatividade de filmes híbridos contendo polioxometalatos frente a pesticidas
• Beneficiário: Adriano Lopes de Souza
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 16/21616-8 - Investigação da reatividade frente a pesticidas de filmes de ácido silicotúngstico em matrizes híbridas
• Beneficiário: Julia Helena de Paula
• Linha de fomento: Bolsas no Brasil - Iniciação Científica