Polymeric nanowrinkles: surface modification of polypropylene films in the VUV energy range

Author(s)

Fitaroni, Lays B. ^[1] ; Cacuro, Thiago A. ^[2] ; Costa, Carlos A. R. ^[3] ; Lanzoni, Evandro M. ^[3] ; Galante, Douglas ^[4] ; Araujo, Joyce R. ^[5] ; Homem, Manoel G. P. ^[1] ; Waldman, Walter R. ^[2] ; Cruz, Sandra A. ^[6]

Affiliation

^[1] Fed Univ ABC, Av Estados 5001, Santo Andre, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Phys Chem & Math, Campus Sorocaba, Rod Joao Leme dos Santos, Km 110, Sorocaba, SP - Brazil

^[3] Brazilian Nanotechnol Natl Lab, Rua Giuseppe M Scolfaro 10, 000, Campinas, SP - Brazil

^[4] Brazilian Synchrotron Light Source, Rua Giuseppe M Scolfaro 10, 000, Campinas, SP - Brazil

^[5] Natl Inst Metrol Qual & Technol, Mat Metrol Div, Duque De Caxias, RJ - Brazil

^[6] Univ Fed Sao Carlos, Dept Chem, Rod Washington Luis, Km 235, SP-370, Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: Journal of Materials Science; v. 56, n. 15, p. 9532-9543, MAY 2021.
• Web of Science Citations: 1

Abstract

The development of strategies for shape-programming polymer materials has been considerably growing. This is due to the possibility of shifting two to three-dimensional shapes producing nanotexturing, such as nanowrinkles. In this work, nanowrinkle patterns were produced in polypropylene (PP) films using a broadband non-monochromatic radiation ranging from 3 to 21 eV by a synchrotron source. The superficial modification was investigated by scanning electron microscopy (SEM) and atomic force microscopy (AFM). Additionally, X-ray photoelectron (XPS) and Raman spectroscopy were used to study the chemical modifications of the PP samples. The surface modifications became more evident as the exposure time increased, proving that the formation of nanowrinkles presents a time-dependent behavior, clearly proved by AFM and SEM analysis. Another important aspect is that nanowrinkles consist of a thin layer compatible with the photon penetration depth in this energy range with almost no change in bulk. The spectroscopic results show crosslinking and unsaturated bonds formation increase as a function of time, which corroborates nanowrinkle formation via stress creation on the surface plane, and the relief of this stress outside the plane. {[}GRAPHICS] . (AU)

• FAPESP's process: 15/08258-2 - Cross sections for the interaction of electrons with volatile organic molecules
• Grantee: Manoel Gustavo Petrucelli Homem
• Support Opportunities: Regular Research Grants
• FAPESP's process: 16/24936-3 - Development of thin films deposited by plasma for polymeric materials photoprotection
• Grantee: Walter Ruggeri Waldman
• Support Opportunities: Regular Research Grants
• FAPESP's process: 16/25703-2 - Recycled polypropylene for food contact: employment of a-C:H thin films by plasma deposition and degradation in the presence of contaminants
• Grantee: Sandra Andrea Cruz
• Support Opportunities: Regular Research Grants