Enzyme-catalyzed preparation of dimeric acid polyester polyol from biodiesel and its further use in the synthesis of polyurethane

RSC Advances ◽  
2014 ◽  
Vol 4 (59) ◽  
pp. 31062 ◽  
Author(s):  
Xiaozhu Yao ◽  
Guiying Wu ◽  
Li Xu ◽  
Houjin Zhang ◽  
Yunjun Yan
Keyword(s):  
Polyester Polyol ◽  
Dimeric Acid

Carbazole-Based Hyperbranched Polyester Polyol: Structural, Rheological, Thermal and Optical Properties

2021 ◽  
Vol 29 (4) ◽  
pp. 257-266
Author(s):  
Edwin A. Murillo ◽  
Margarita Cerón ◽  
M. Judith Percino
Keyword(s):  
Optical Properties ◽  
Hyperbranched Polyester ◽  
Polyester Polyol

Shelf Life Assessment of Poly(ethylene-co-vinyl acetate) and Polyester Polyol Resins Used as Adhesives

2014 ◽  
pp. 151-164
Author(s):  
Mogon Patel ◽  
Laura Pilon ◽  
Peter Beavis ◽  
Paul Morrell ◽  
Niaz Khan ◽  
...  
Keyword(s):  
Shelf Life ◽  
Vinyl Acetate ◽  
Life Assessment ◽  
Polyester Polyol ◽  
Poly Ethylene

scholarly journals Nanostructured composites based on graphene and nanoparticles of cobalt in the composition of monoamine oxidase biosensors for determination of antidepressants

2018 ◽  
Vol 84 (8) ◽  
pp. 5-14 ◽  
Author(s):  
E. P. Medyantseva ◽  
D. V. Brusnitsyn ◽  
R. V. Varlamova ◽  
O. A. Konovalova ◽  
H. K. Budnikov
Keyword(s):  
Monoamine Oxidase ◽  
Lower Limit ◽  
Electrode Surface ◽  
Polyester Polyol ◽  
Graphite Electrodes ◽  
Transfer Resistance ◽  
Amine Derivative ◽  
Screen Printed

Amperometric monoamine oxidase biosensors based on screen-printed graphite electrodes modified with nanostructured reduced graphene oxide (RGO) composites and cobalt nanoparticles (CoNPs) were developed to determine antidepressant drug substances: tianeptine, thioridazine, and fluoxetine. Combinations of carbon nanomaterials with metal nanoparticles (nanocomposites) along with retaining the properties of individual components, also provide a new quality of the developed devices due to their joint contribution. The nanomaterial-modifier was applied to the surface of screen-printed graphite electrodes using dropwise evaporation. Fixing of RGO on the surface of the screen-printed graphite electrodes occurs due to electrostatic interaction between RGO carboxyl groups and amine groups of the amine derivative on the platform of polyester polyol (H20–NH2). The CoNPs were obtained electrochemically by the method of chronoamperometry at a potentialE= – 1.0 V and different time of their accumulation (about 50 – 60 sec) on the electrode surface. According to the data of atomic force microscopy, the predominant size of CoNPs is (40 ± 2) and (78 ± 8) nm, depending on the time of electrochemical deposition of NPs. Data of electrochemical impedance spectroscopy show that nanocomposites RGO-chitosan/CoNPs and RGO-amine derivative on the polyester polyol (H20–NH2)/CoNPs platform are characterized by the lowest values of the charge transfer resistance. The use of those nanocomposites modifying the electrode surface significantly improved the analytical characteristics of the developed biosensors providing a wider range of operating concentrations from 1 × 10–4to 5 × 10–9mol/liter, greater sensitivity coefficient, better correlation coefficient, and lower limit of the detectable concentrations. A possibility of using biosensors to control the quality of antidepressants upon determination of the main active substance in medicinal drugs and biological fluids is shown. The lower limit of detectable concentrations (7 – 9) × 10–10mol/liter is attained when using tyramine as a substrate for determination of fluoxetine, thioridazine and tianeptine, respectively.

Superparamagnetic Cobalt Nanoparticles in Hyperbranched Polyester Polyol matrix with Anti-Protease Activity

2021 ◽  
pp. 168808
Author(s):  
Artur A. Khannanov ◽  
Anastasia A. Rossova ◽  
Klara A. Ignatyeva ◽  
Nikolay A. Ulakhovich ◽  
Alexander V. Gerasimov ◽  
...  
Keyword(s):  
Protease Activity ◽  
Cobalt Nanoparticles ◽  
Hyperbranched Polyester ◽  
Polyester Polyol

Synthesis of New Hyperbranched Dendrimers with Terminal Cationic Groups Based on Boltorn H20 Polyester Polyol

2020 ◽  
Vol 90 (4) ◽  
pp. 624-629
Author(s):  
S. A. Loza ◽  
V. V. Dotsenko ◽  
A. V. Bespalov ◽  
N. A. Aksenov ◽  
S. V. Utin ◽  
...  
Keyword(s):  
Polyester Polyol

Synthesis of palm oil-based polyester polyol for polyurethane adhesive production

2013 ◽  
Vol 131 (6) ◽  
pp. n/a-n/a ◽  
Author(s):  
Khoon Poh Ang ◽  
Choy Sin Lee ◽  
Sit Foon Cheng ◽  
Cheng Hock Chuah
Keyword(s):  
Palm Oil ◽  
Polyurethane Adhesive ◽  
Polyester Polyol

scholarly journals Magnetic Cobalt and Cobalt Oxide Nanoparticles in Hyperbranched Polyester Polyol Matrix

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
O. I. Medvedeva ◽  
S. S. Kambulova ◽  
O. V. Bondar ◽  
A. R. Gataulina ◽  
N. A. Ulakhovich ◽  
...  
Keyword(s):  
Magnetic Hysteresis ◽  
Average Diameter ◽  
Physicochemical Characteristics ◽  
Blocking Temperature ◽  
Zero Field ◽  
Hyperbranched Polyester ◽  
Polyester Polyol ◽  
Cobalt Oxide Nanoparticles ◽  
Ft Ir ◽  
Co Nanoparticles

A series of cobalt (Co) and its oxides based nanoparticles were synthesized by using hyperbranched polyester polyol Boltorn H20 as a platform and sodium borohydride as a reducing agent. UV, FT-IR, XRD, NTA, and TEM methods were employed to obtain physicochemical characteristics of the products. The average diameter of Co nanoparticles was approximately 8.2±3.4 nm. Their magnetic properties, including hysteresis loop, field-cooled, and zero field-cooled curves were investigated. The nanoparticles exhibit superparamagnetism at room temperature, accompanied by magnetic hysteresis below the blocking temperature.

Study on the Synthesis of Polyester Type Waterborne Polyurethane and Modifying by Nano-Sized Particles

2012 ◽  
Vol 217-219 ◽  
pp. 656-660
Author(s):  
Yi Chen ◽  
Wen Yong Liu ◽  
Guang Sheng Zeng ◽  
Xiang Gang Li ◽  
Ling Gu
Keyword(s):  
Small Molecule ◽  
Mass Fraction ◽  
Water Resistance ◽  
Raw Materials ◽  
Waterborne Polyurethane ◽  
Chain Extender ◽  
Polyester Polyol ◽  
Polyurethane Film ◽  
Mechanical Characters

The waterborne polyurethane was prepared by reaction between polyester polyol and isophorone diisocyanat, different nanoparticles were filled into the system for modification. The effect of different ratio of materials, the kinds and mass of nanoparticles on the characters of waterborne polyurethane latex and film were investigated. The results showed that the stable polyurethane latex and polyurethane film with perfect characters could be prepared when the ratio of NNCO/NOH was 2.5~3.0, the DMPA with a mass fraction of 5%~6% was added into reaction as a macromolecule extender after adding small molecule chain extender BPO. Filling nanoparticles into the polyurethane latex could improve the water resistance and mechanical characters of the film. Nano-sized SiO2 was a better modifier than TiO2, and the appropriate mass fraction of SiO2 was 6% of polyurethane raw materials.

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