Natural plant oils and fats as renewable resources: A sustainable option?

2007 ◽  
Vol 19 (11) ◽  
pp. 254-257 ◽  
Author(s):  
Melvyn F. Askew
Author(s):  
Kinga Tamási ◽  
Kálmán Marossy

AbstractThe paper deals with the study of seven selected natural plant oils. Differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA) and thermally stimulated discharge (TSD) methods were used. It has been found that most of the oils tested are in a glassy state at low temperature and have multiple transitions in the low temperature range. DSC shows complex melting-like processes or glass transition. For both DMA and TSD, the scaffold supportive method was used and found as a suitable one. DMA and TSD proved more sensitive than DSC and revealed at least two transitions between − 120 and − 40 °C. In the case of three oils (argan, avocado and sunflower), current reversal was observed by TSD; this symptom cannot be fully explained at the moment.


2017 ◽  
Vol 09 (04) ◽  
pp. 1750045 ◽  
Author(s):  
Yucheng Zhong ◽  
Umeyr Kureemun ◽  
Le Quan Ngoc Tran ◽  
Heow Pueh Lee

Natural fibers are extracted from natural resources such as stems of plants. In contrast to synthetic fibers (e.g., carbon fibers), natural fibers are from renewable resources and are eco-friendlier. Plant fibers are important members of natural fibers. Review papers discussing the microstructures, performances and applications of natural plant fiber composites are available in the literature. However, there are relatively fewer review reports focusing on the modeling of the mechanical properties of plant fiber composites. The microstructures and mechanical behavior of plant fiber composites are briefly introduced by highlighting their characteristics that need to be considered prior to modeling. Numerical works that have already been carried out are discussed and summarized. Unlike synthetic fibers, natural plant fiber composites have not received sufficient attention in terms of numerical simulations. Existing technical challenges in this subject are summarized to provide potential opportunities for future research.


2017 ◽  
Vol 102 (9) ◽  
pp. 873-874
Author(s):  
David Richard Thaxter ◽  
Anna Kilonback
Keyword(s):  

2015 ◽  
Vol 65 ◽  
pp. 286-297 ◽  
Author(s):  
Oğuz Türünç ◽  
Stijn Billiet ◽  
Kevin De Bruycker ◽  
Samira Ouardad ◽  
Johan Winne ◽  
...  
Keyword(s):  

2008 ◽  
Vol 33 (4) ◽  
pp. 2659-2680
Author(s):  
M. Mostafa ◽  
Effat Zaher ◽  
A. El-Shaer ◽  
Nour El-houda Reyad
Keyword(s):  

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Guoqiang Zhu ◽  
Chengguo Liu ◽  
Chaoqun Zhang

Abstract Polymer materials derived from natural resources have gained increasing attention in recent years because of the uncertainties concerning petroleum supply and prices in the future as well as their environmental pollution problems. As one of the most abundant renewable resources, plant oils are suitable starting materials for polymers because of their low cost, the rich chemistry that their triglyceride structure provides, and their potential biodegradability. This chapter covers the structure, modification of triglycerides and their derivatives as well as synthesis of polymers therefrom. The remarkable advances during the last two decades in organic synthesis using plant oils and the basic oleochemicals derived from them are selectively reported and updated. Various methods, such as condensation, radical/cationic polymerization, metathesis procedure, and living polymerization, have also been applied in constructing oil-based polymers. Based on the advance of these changes, traditional polymers such as polyamides, polyesters, and epoxy resins have been renewed. Partial oil-based polymers have already been applied in some industrial areas and recent developments in this field offer promising new opportunities.


Holzforschung ◽  
2011 ◽  
Vol 65 (1) ◽  
pp. 3-11 ◽  
Author(s):  
Elisabeth Lackinger ◽  
Leo Schmid ◽  
Jürgen Sartori ◽  
Akira Isogai ◽  
Antje Potthast ◽  
...  

Abstract Natural oils derived from linseed, rapeseed, soybean, and a special breed of sunflower were tested for the production of maleated fatty oils for paper sizing in the ene-reaction with maleic anhydride. All these maleated oils were subjected to a conventional sizing test proving their ability to hydrophobize handsheets. Natural oils having only monounsaturated fatty acid residues (oleic acid) in the triglycerides worked best by having lower product viscosity and higher yields. The optimized production procedure employs antioxidant addition, an increased maleic anhydride:triglyceride ratio of 4:1, as well as increased pressure to reduce undesired polymeric byproducts and to increase yield.


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