scholarly journals Development of Quebracho (Schinopsis balansae) Tannin-Based Thermoset Resins

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4412
Author(s):  
Emanuele Cesprini ◽  
Primož Šket ◽  
Valerio Causin ◽  
Michela Zanetti ◽  
Gianluca Tondi
Keyword(s):  
Thermal Behavior ◽  
Material Science ◽  
Furfuryl Alcohol ◽  
Chemical Structure ◽  
Water Resistance ◽  
Natural Polymers ◽  
High Performing ◽  
Thermoset Resins ◽  
Quebracho Tannin ◽  
Schinopsis Balansae

One of the major challenges currently in the field of material science is finding natural alternatives to the high-performing plastics developed in the last century. Consumers trust synthetic products for their excellent properties, but they are becoming aware of their impact on the planet. One of the most attractive precursors for natural polymers is tannin extracts and in particular condensed tannins. Quebracho (Schinopsis balansae) extract is one of the few industrially available flavonoids and can be exploited as a building block for thermoset resins due to its phenol-like reactivity. The aim of this study was to systematically investigate different hardeners and evaluate the water resistance, thermal behavior, and chemical structure of the quebracho tannin-based polymers in order to understand their suitability as adhesives. It was observed that around 80% of the extract is resistant to leaching when 5% of formaldehyde or hexamine or 10% of glyoxal or furfural are added. Additionally, furfuryl alcohol guarantees high leaching resistance, but only at higher proportions (20%). The quebracho-based formulations showed specific thermal behavior during hardening and higher degradation resistance than the extract. Finally, these polymers undergo similar chemistry to those of mimosa, with exclusive reactivity of the A-ring of the flavonoid.

scholarly journals A Review on Epoxy and Polyester Based Polymer Concrete and Exploration of Polyfurfuryl Alcohol as Polymer Concrete

2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
Rakesh Kumar
Keyword(s):  
Furfuryl Alcohol ◽  
Water Resistance ◽  
Review Paper ◽  
Chemical Resistance ◽  
Acid Catalyst ◽  
Polymer Concrete ◽  
High Quality ◽  
Polymeric Systems ◽  
Thermoset Resins ◽  
Polyfurfuryl Alcohol

Petroleum based epoxy and polyester based thermoset resins can be used to produce high-quality polymer concrete. However, petroleum based resources are finite and this has necessitated the development of thermoset bioresins to be used as polymer concrete. Furfuryl alcohol (FA), a thermoset bioresin, is derived from lignocellulosic biomass and it can be polymerized into polyfurfuryl alcohol (PFA) in the presence of an acid catalyst. The highly exothermic polymerization reactions involving conversion of FA to PFA can be used to fabricate PFA based concrete with rock-like structure. The PFA based polymer concrete offers the broadest range of chemical resistance against acid and alkali over all other types of polymer concrete which are based upon different thermoset polymeric systems. In this review paper, we have discussed the formulations (incorporation of aggregates, fillers, and resin) and properties (especially compressive and flexural) of epoxy and polyester based polymer concrete. In another section, we have given the mechanical, thermal, and water resistance properties of PFA based biopolymer, biocomposites, nanocomposites, and polymer concrete. Lastly, we have tried to explore whether PFA can be used successfully as biopolymer concrete or not.

Water resistance improvement by polyethyleneimine of tannin-furfuryl alcohol adhesives

2019 ◽  
Vol 10 (1) ◽  
pp. 16-21 ◽  
Author(s):  
Younes Shirmohammadli ◽  
Payam Moradpour ◽  
Ali Abdulkhani ◽  
Davood Efhamisisi ◽  
Antonio Pizzi
Keyword(s):  
Furfuryl Alcohol ◽  
Water Resistance ◽  
Resistance Improvement

Superhydrophobic Copper Materials with Excellent Durability and Regeneration Based on Self-Similarity in Structure and Composition

2021 ◽  
Vol 21 (12) ◽  
pp. 6088-6093
Author(s):  
Wenxia Bai ◽  
Jinxuan Zhou ◽  
Xueting Shi ◽  
Haitao Wang ◽  
Yanhua Liu ◽  
...  
Keyword(s):  
Superhydrophobic Surface ◽  
Furfuryl Alcohol ◽  
Chemical Structure ◽  
High Strength ◽  
Micro Structure ◽  
Self Similarity ◽  
Widespread Application ◽  
New Thought ◽  
The Poor

The widespread application of artificial superhydrophobic material is hindered by the poor durability and regeneration of artificial superhydrophobicity. The problem is expected to be resolved by endowing the superhydrophobic material with self-similarity. Herein, Copper-based superhydrophobic material intensified by furfuryl alcohol resin (Cu/FAR) with long-term durability and high strength is developed, and the obtained Cu/FAR composite reveals excellent and durable superhydrophobicity. Moreover, it is a remarkable fact that the as-prepared superhydrophobic Cu/FAR exhibits outstanding durability and maintenance of superhydrophobicity grounded on the good self-similarity in micro-structure, chemical structure and composition both externally and internally. Consequently, the superhydrophobicity can be maintained or regenerated without difficulty even if superhydrophobic surface has been damaged or fouled accidentally. Therefore, the method provides a new thought to prepare superhydrophobic material with robust durability and outstanding maintenance.

Gas separation performance of C/CMS membranes derived from poly(furfuryl alcohol) (PFA) with different chemical structure

2010 ◽  
Vol 361 (1-2) ◽  
pp. 22-27 ◽  
Author(s):  
Chengwen Song ◽  
Tonghua Wang ◽  
Huawei Jiang ◽  
Xiuyue Wang ◽  
Yiming Cao ◽  
...  
Keyword(s):  
Gas Separation ◽  
Furfuryl Alcohol ◽  
Chemical Structure ◽  
Separation Performance ◽  
Gas Separation Performance

scholarly journals Chemical structure and curing dynamics of bisphenol S, PEEK TM ‐like, and resveratrol phthalonitrile thermoset resins

2020 ◽  
Vol 58 (24) ◽  
pp. 3419-3431
Author(s):  
Boris Dyatkin ◽  
Naresh C. Osti ◽  
Robert W. Smith ◽  
Madhusudan Tyagi ◽  
Tristan Butler ◽  
...  
Keyword(s):  
Chemical Structure ◽  
Bisphenol S ◽  
Thermoset Resins

scholarly journals Alkyl-Chitosan-Based Adhesive: Water Resistance Improvement

Molecules ◽  
2019 ◽  
Vol 24 (10) ◽  
pp. 1987 ◽  
Author(s):  
Narimane Mati-Baouche ◽  
Cédric Delattre ◽  
Hélène de Baynast ◽  
Michel Grédiac ◽  
Jean-Denis Mathias ◽  
...  
Keyword(s):  
Shear Stress ◽  
Bond Strength ◽  
Chemical Modification ◽  
Chemical Structure ◽  
Water Resistance ◽  
Flow Properties ◽  
Adhesive Properties ◽  
Alkyl Chains ◽  
Modified Polymers ◽  
Resistance Improvement

A chemical modification by grafting alkyl chains using an octanal (C8) on chitosan was conducted with the aim to improve its water resistance for bonding applications. The chemical structure of the modified polymers was determined by NMR analyses revealing two alkylation degrees (10 and 15%). In this study, the flow properties of alkyl-chitosans were also evaluated. An increase in the viscosity was observed in alkyl-chitosan solutions compared with solutions of the same concentration based on native chitosan. Moreover, the evaluation of the adhesive strength (bond strength and shear stress) of both native and alkyl-chitosans was performed on two different double-lap adherends (aluminum and wood). Alkyl-chitosans (10 and 15%) maintain sufficient adhesive properties on wood and exhibit better water resistance compared to native chitosan.

Thermal Behaviors of N-Octadecylated Poly( Ethyleneimine) with Different Grafting Ratios

2011 ◽  
Vol 332-334 ◽  
pp. 2085-2088 ◽  
Author(s):  
Yi Ping Yin ◽  
Hai Feng Shi ◽  
Li Juan Li ◽  
Xing Xiang Zhang
Keyword(s):  
Differential Scanning Calorimetry ◽  
Thermal Behavior ◽  
Chemical Structure ◽  
Side Chain ◽  
Scanning Calorimetry ◽  
Fourier Transformed Infrared Spectroscopy ◽  
Grafting Ratio ◽  
Grafting Density ◽  
Alkyl Groups ◽  
Linear Increment

A series of N-octadecylated polyethyleneimine (PEI18C) comblike polymers with different grafting ratios, through N-alkylation method, have been successfully prepared. The chemical structure and thermal behavior of PEI18C comblike polymers with different grafting ratios has been characterized by Fourier transformed infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC). Experimental shows that C18 alkyl groups have been successfully grafted onto PEI backbones, and the thermal behavior of PEI18C comblike polymers with different grafting ratios exhibit the linear increment with the grafting ratio of alkyl groups. It can be attributed to the effect of the grafting density of alkyl side groups along PEI backbones. The detailed investigation and discussion is carried out from the viewpoint of side chain crystallization and molecular packing behaviors.

Synthesis and ‎characterization ‎of a new acid ‎molten salt and ‎the study of ‎its ‎thermal ‎behavior and ‎catalytic ‎activity ‎in Fischer ‎esterification ‎

2021 ◽  
Author(s):  
Lia Zaharani ◽  
Nader Ghaffari Khaligh ◽  
Mohd Rafie Johan ◽  
Hayedeh Gorjian
Keyword(s):  
Mass Spectrometry ◽  
Catalytic Activity ◽  
Thermal Behavior ◽  
Molten Salt ◽  
Structure Elucidation ◽  
Chemical Structure ◽  
2D Nmr ◽  
Synthesis And Characterization ◽  
Fischer Esterification

A new acid molten salt was ‎‎prepared and its structure ‎‎elucidation was conducted ‎‎by FTIR, ‎‎1D NMR, 2D NMR, ‎‎and mass spectrometry. ‎Further support to ‎elucidate the chemical ‎structure of...

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