Stepwise catalytic transformations of renewable feedstock arising from plant oils

Background: Cross-linking structure of polyurethanes determines no degradability of these materials. However, introducing the hydrolysable substrates (of natural or synthetic origin) into the cross-linked polyurethanes structure makes them biodegradable. Moreover compounds (such as polycaprolactone triol, glycerin, lysine triisocyanate, etc.) that are used for polyurethane cross-linking are degraded in non-toxic products. All these kinds of compounds can be introduced into soft or hard segments via urethane bonds. Objective: The review focuses on kind of multifunctional polyols and isocyanates, and low molecular crosslinkers used for cross-linked polyurethanes obtaining. These compounds are natural substrates (in the native state or after modification) or are synthetic compounds with degradable linkages. They belong to polyesters, plant oils, proteins, saccharides, and others (e.g. lignocellulosic materials), and they are synthesized chemically or via biosynthesis by algae, plants, microorganisms, and by animals. Conclusion: Incorporation of degradable groups (such as ester moieties) into the polymer structure, and using of substrates with the structure known and metabolized by microorganisms for soft or hard segments building, facilitate degradation of cross-linked polyurethanes.

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Plant Oil-Based Nanoemulsions: Preparation and Efficacy for Hair Treatment

Current Applied Polymer Science ◽

10.2174/2452271604999201026191844 ◽

2020 ◽

Vol 04 ◽

Author(s):

Lívia Gonçalves Ferreira Rodrigues ◽

Juliana Falcão Alves de Carvalho ◽

Cristal dos Santos Cerqueira Pinto ◽

Elisabete Pereira Santos ◽

Claudia Regina Elias Mansur

Keyword(s):

Human Hair ◽

Mechanical Tests ◽

Plant Oils ◽

Plant Oil ◽

Oil In Water ◽

Hair Samples ◽

Poly Ethylene Oxide ◽

Treatment Objective ◽

Poly Ethylene ◽

Average Size

Background:: The use of polymers in hair care products is widespread, and silicones in particular are extensively used in cosmetic formulations. In addition, plant oils can also be used for hair treatment. Objective: In the present work, oil-in-water (O/W) nanoemulsions were prepared to repair chemical damage to human hair samples, to investigate the combined use of a silicone polyether copolymer (surfactant) that has a branch composed of poly(ethylene oxide) in its chains, and two types of plant oils: coconut and ojon oil. Materials and Methods:: Surfactant-oil-water formulations were obtained by ultrasonic processing. The nanoemulsions were then applied to human hair strands previously damaged with sodium hydroxide, to compare the treated strands with untreated ones. The efficacy of the formulations was investigated by scanning electron microscopy, thermogravimetric analysis and mechanical tests. Results and Discussion:: Stables nanoemulsions were obtained with average size of the dispersed droplets up to 400 nm. The micrographs suggest that the action mechanism of the nanoemulsions depends not only on the type of plant oil used and size of the droplets dispersed in the system, but also on the type of hair that receives the treatment. The thermal analysis showed that the use of nanoemulsion changed the temperature of keratin interconversion to higher values, which can make hair fibers more resistant to heat. Hair resistance was improved when comparing virgin samples to the damaged ones. Conclusion:: The nanoemulsions were efficient in the treatment of the hair samples, which showed a significant improvement of their mechanical properties.

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Authenticity of plant oils in the market place

INFORM International News on Fats Oils and Related Materials ◽

10.21748/inform.02.2017.12 ◽

2017 ◽

Vol 28 (2) ◽

pp. 12-14 ◽

Cited By ~ 1

Author(s):

Glenn Norton ◽

Keyword(s):

Plant Oils ◽

Market Place

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Formic Acid: A Promising Bio-Renewable Feedstock for Fine Chemicals

Advanced Synthesis & Catalysis ◽

10.1002/adsc.201200748 ◽

2012 ◽

Vol 354 (17) ◽

pp. 3180-3186 ◽

Cited By ~ 57

Author(s):

Manuel G. Mura ◽

Lidia De Luca ◽

Giampaolo Giacomelli ◽

Andrea Porcheddu

Keyword(s):

Formic Acid ◽

Fine Chemicals ◽

Renewable Feedstock

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Efficient and selective catalytic hydroxylation of unsaturated plant oils: a novel method for producing anti-pathogens

BMC Chemistry ◽

10.1186/s13065-021-00748-z ◽

2021 ◽

Vol 15 (1) ◽

Author(s):

Ahmed M. Senan ◽

Binru Yin ◽

Yaoyao Zhang ◽

Mustapha M. Nasiru ◽

Yong‐Mei Lyu ◽

...

Keyword(s):

Antimicrobial Agents ◽

In Vitro Study ◽

Functional Method ◽

Plant Oils ◽

Main Process ◽

Catalytic Method ◽

Novel Method ◽

Pharmaceutical Industries ◽

Increasing Demand

AbstractWith the increasing demand for antimicrobial agents and the spread of antibiotic resistance in pathogens, the exploitation of plant oils to partly replace antibiotic emerges as an important source of fine chemicals, functional food utility and pharmaceutical industries. This work introduces a novel catalytic method of plant oils hydroxylation by Fe(III) citrate monohydrate (Fe3+-cit.)/Na2S2O8 catalyst. Methyl (9Z,12Z)-octadecadienoate (ML) was selected as an example of vegetable oils hydroxylation to its hydroxy-conjugated derivatives (CHML) in the presence of a new complex of Fe(II)-species. Methyl 9,12-di-hydroxyoctadecanoate 1, methyl-9-hydroxyoctadecanoate 2 and methyl (10E,12E)-octadecanoate 3 mixtures is produced under optimized condition with oxygen balloon. The specific hydroxylation activity was lower in the case of using Na2S2O8 alone as a catalyst. A chemical reaction has shown the main process converted of plantoils hydroxylation and (+ 16 Da) of OH- attached at the methyl linoleate (ML-OH). HPLC and MALDI-ToF-mass spectrometry were employed for determining the obtained products. It was found that adding oxidizing agents (Na2S2O8) to Fe3+ in the MeCN mixture with H2O would generate the new complex of Fe(II)-species, which improves the C-H activation. Hence, the present study demonstrated a new functional method for better usage of vegetable oils.Producing conjugated hydroxy-fatty acids/esters with better antipathogenic properties. CHML used in food industry, It has a potential pathway to food safety and packaging process with good advantages, fundamental to microbial resistance. Lastly, our findings showed that biological monitoring of CHML-minimum inhibitory concentration (MIC) inhibited growth of various gram-positive and gram-negative bacteria in vitro study. The produced CHML profiles were comparable to the corresponding to previousstudies and showed improved the inhibition efficiency over the respective kanamycin derivatives.

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