| Grant number: | 16/12700-5 |
| Support Opportunities: | Scholarships in Brazil - Scientific Initiation |
| Start date: | September 01, 2016 |
| End date: | August 31, 2018 |
| Field of knowledge: | Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials |
| Principal Investigator: | Derval dos Santos Rosa |
| Grantee: | Clara Rodrigues Bauli |
| Host Institution: | Centro de Engenharia, Modelagem e Ciências Sociais Aplicadas (CECS). Universidade Federal do ABC (UFABC). Santo André , SP, Brazil |
Abstract Biodegradable polymers are an alternative to the environmental problems of accumulation of plastic waste. Poly (butylene adipate co-terephthalate) (PBAT) is one of this biodegradable polymers which, due its characteristics, is a suitable substitute for the non-biodegradable polyethylene. However, its lower mechanical properties, when compared to traditional polymers, limit their application. The use of nanocellulose in reinforced biodegradable composites is an attractive candidate once it modifies this deficiency by acting as reinforcement while maintaining a biodegradability of the material. However, the compatibilization of nanocellulose and hydrophobic polymer matrices such as PBAT is still a challenge. This project proposes the study of the incorporation of nanocellulose extracted from wood pulp by enzymatic methodology from cellulosic waste by an environmentally friendly methodology, developed in previous project supported by FAPESP, in PBAT, forming a biodegradable nanocomposite with wide field of applications as packaging or other activities wich requires flexible polymers with better properties. In this, it is proposed an evaluation of nanocellulose incorporation with application of pre-treatments that aim to eliminate hemicellulose and lignin, since the components are cited as possible compatibilizantes. And it is also proposed the use of surfactant / humectant as nanocellulose surface modifiers, facilitating nanocellulose-matrix interaction, which will be characterized by Fourier transform infrared (FTIR) and zeta potential. Three concentrations of reforestation will be tested: 1%, 3% and 5%, by two techniques of incorporation: casting and mechanical processing, evaluating the efficiency of the two mixing processes. The characteristics of the obtained composites will be evaluated by mechanical tensile test, thermogravimetric analysis, permeability test, contact angle and biodegradability. | |
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