Effect of yerba mate ( Ilex paraguariensis ) residue and coupling agent on the mechanical and thermal properties of polyolefin‐based composites

2019 ◽  
Vol 41 (1) ◽  
pp. 161-173 ◽  
Author(s):  
Irene Bavasso ◽  
Maria P. Bracciale ◽  
Francesca Sbardella ◽  
Jacopo Tirillò ◽  
Fabrizio Sarasini ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Coupling Agent ◽  
Ilex Paraguariensis ◽  
Mechanical And Thermal Properties ◽  
Yerba Mate

scholarly journals Yerba Mate Extract in Microfibrillated Cellulose and Corn Starch Films as a Potential Wound Healing Bandage

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2807
Author(s):  
Meysam Aliabadi ◽  
Bor Shin Chee ◽  
Mailson Matos ◽  
Yvonne J. Cortese ◽  
Michael J. D. Nugent ◽  
...  
Keyword(s):  
Wound Healing ◽  
Bioactive Compounds ◽  
Corn Starch ◽  
Microfibrillated Cellulose ◽  
Ilex Paraguariensis ◽  
Mechanical And Thermal Properties ◽  
Yerba Mate ◽  
Cellulose Films ◽  
Ultrafine Grinding

Microfibrillated cellulose films have been gathering considerable attention due to their high mechanical properties and cheap cost. Additionally, it is possible to include compounds within the fibrillated structure in order to confer desirable properties. Ilex paraguariensis A. St.-Hil, yerba mate leaf extract has been reported to possess a high quantity of caffeoylquinic acids that may be beneficial for other applications instead of its conventional use as a hot beverage. Therefore, we investigate the effect of blending yerba mate extract during and after defibrillation of Eucalyptus sp. bleached kraft paper by ultrafine grinding. Blending the extract during defibrillation increased the mechanical and thermal properties, besides being able to use the whole extract. Afterwards, this material was also investigated with high content loadings of starch and glycerine. The results present that yerba mate extract increases film resistance, and the defibrillated cellulose is able to protect the bioactive compounds from the extract. Additionally, the films present antibacterial activity against two known pathogens S. aureus and E. coli, with high antioxidant activity and increased cell proliferation. This was attributed to the bioactive compounds that presented faster in vitro wound healing, suggesting that microfibrillated cellulose (MFC) films containing extract of yerba mate can be a potential alternative as wound healing bandages.

Maleated soybean oil as coupling agent in recycled polypropylene/wood flour composites: Mechanical, thermal, and morphological properties

2018 ◽  
Vol 32 (8) ◽  
pp. 1056-1067 ◽  
Author(s):  
Matheus Poletto
Keyword(s):  
Thermal Properties ◽  
Soybean Oil ◽  
Coupling Agent ◽  
Wood Flour ◽  
Natural Fibers ◽  
Morphological Properties ◽  
Mechanical And Thermal Properties ◽  
Wood Fibers ◽  
Alternative Source ◽  
Recycled Polypropylene

In this study, composites with interesting mechanical and thermal properties were prepared using chemically modified vegetable oil as coupling agent in wood-fibers-reinforced recycled polypropylene. Soybean oil was reacted with maleic anhydride to produce maleated soybean oil (MASO). The mechanical, thermal, and morphological properties of the composite were evaluated. The usage of MASO as a coupling agent clearly improved the interfacial adhesion between wood fibers and the polypropylene matrix and increased the mechanical and thermal properties evaluated. Based on the obtained results, it is concluded that MASO can act as an alternative source of coupling agent dispensing with the addition of petroleum-based compatibilizers to improve the mechanical and thermal properties of composites reinforced with natural fibers.

Effects of Silane Coupling Agent on the Mechanical and Thermal Properties of Silica/Polypropylene Composites

Polymer Korea ◽  
2017 ◽  
Vol 41 (4) ◽  
pp. 599-609
Author(s):  
Minchul Lee ◽  
Yeongseon Kim ◽  
Hyunjun Ryu ◽  
Sung-Hyun Baeck ◽  
Sang Eun Shim
Keyword(s):  
Thermal Properties ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Mechanical And Thermal Properties ◽  
Polypropylene Composites ◽  
Silane Coupling
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