Flexible decorative wood veneer with high strength, wearability and moisture penetrability enabled by infiltrating castor oil-based waterborne polyurethanes

2022 ◽  
Vol 230 ◽  
pp. 109502
Author(s):  
Lu Zhi ◽  
Chaoqun Zhang ◽  
Zhenzhen Liu ◽  
Tao Liu ◽  
Xinyuan Dou ◽  
...  
Keyword(s):  
Castor Oil ◽  
High Strength ◽  
Wood Veneer ◽  
Waterborne Polyurethanes

Preparation and Application of Undecylenate Based Diol for Bio-Based Waterborne Polyurethane Dispersion

2014 ◽  
Vol 955-959 ◽  
pp. 88-91 ◽  
Author(s):  
Zhe Yang ◽  
Yan Bin Zhu ◽  
Fang Peng ◽  
Chang Qing Fu
Keyword(s):  
Castor Oil ◽  
Room Temperature ◽  
Click Reaction ◽  
Waterborne Polyurethane ◽  
Chain Extender ◽  
Proton Nuclear Magnetic Resonance ◽  
Isophorone Diisocyanate ◽  
Polyurethane Dispersion ◽  
Waterborne Polyurethanes ◽  
Ft Ir

The undecylenate based diol (UAD) has been synthesized from undecylenate by esterification and thiol-ene click reaction sequently, and then it was used as a diol to prepare bio-based waterborne polyurethane (WPU) reacting with isophorone diisocyanate (IPDI) and castor oil-based carboxyl hydrophilic chain extender. The structure of undecylenate based diol was verified by hydrogen proton nuclear magnetic resonance (1H NMR). Fourier transform infrared spectroscopy (FT-IR) was used to characterize the structure of WPU film. Furthermore, particle size and viscosity were used to character apparent properties of the bio-based waterborne polyurethane dispersion. The result shows that: bio-based waterborne polyurethane dispersion is transparent and very stable under room temperature. This work provides a simple and efficient method for the preparation of fatty acids based polyols and bio-based waterborne polyurethanes.

Castor oil-based waterborne polyurethanes with tunable properties and excellent biocompatibility

2016 ◽  
Vol 118 (10) ◽  
pp. 1512-1520 ◽  
Author(s):  
Kai Liu ◽  
Shida Miao ◽  
Zhiguo Su ◽  
Lijing Sun ◽  
Guanghui Ma ◽  
...  
Keyword(s):  
Castor Oil ◽  
Waterborne Polyurethanes ◽  
Tunable Properties

Waterborne polyurethanes from castor oil-based polyols for next generation of environmentally-friendly hair-styling agents

2020 ◽  
Vol 142 ◽  
pp. 105588 ◽  
Author(s):  
Yi Zhang ◽  
Wenbo Zhang ◽  
Xiao Wang ◽  
Qianwen Dong ◽  
Xueyi Zeng ◽  
...  
Keyword(s):  
Castor Oil ◽  
Environmentally Friendly ◽  
Next Generation ◽  
Waterborne Polyurethanes ◽  
Hair Styling

scholarly journals Mechanical properties of transparent high strength biocomposites from delignified wood veneer

2020 ◽  
Vol 133 ◽  
pp. 105853 ◽  
Author(s):  
Erik Jungstedt ◽  
Céline Montanari ◽  
Sören Östlund ◽  
Lars Berglund
Keyword(s):  
Mechanical Properties ◽  
High Strength ◽  
Wood Veneer

scholarly journals Preparation and Properties of Biobased, Cationic, Waterborne Polyurethanes Dispersions from Castor Oil and Poly (Caprolactone) Diol

2021 ◽  
Vol 11 (11) ◽  
pp. 4784
Author(s):  
Ying Li ◽  
Sichong Chen ◽  
Jun Shen ◽  
Siqi Zhang ◽  
Ming Liu ◽  
...  
Keyword(s):  
Adhesive Strength ◽  
Castor Oil ◽  
Mechanical Performance ◽  
Aqueous Dispersion ◽  
Waterborne Polyurethane ◽  
Peel Strength ◽  
Waterborne Polyurethanes ◽  
Film Forming ◽  
Poly Caprolactone ◽  
Positive Effect

Biobased cationic waterborne polyurethanes (WPUs) were prepared using isophorone diisocyanate (IPDI), N-methyl diethanolamine (N-MDEA), polycaprolactone (PCL) diol, hydrochlotic acid (HCl), and 1,4-butanediol (BDO). To improve the mechanical performance and adhesive strength of the waterborne polyurethane films, different amounts of castor oil (CO) acting as a cross-linking agent were incorporated in the polyurethane structure. The structures of the waterborne polyurethanes were assessed by Fourier-transform infrared spectroscopy (FTIR). The combination of CO had a positive effect on the dispersion and stability properties of WPUs. WPUs containing higher content of CO demonstrated a remarkable enhancement in homogeneity among particles. The stable aqueous dispersion was obtained even when N-MDEA loading was as low as 3.2 wt%; a bonus of this low hydrophilic moiety was the excellent adhesive strength, whose T-peel strength could reach up to 36.8 N/25 mm, about 114% higher than that of WPU (17.2 N/25 mm) without any CO content. The elongation at break of CO7.40%-WPU was 391%. In addition, the fracture mechanism of the waterborne polyurethane films transformed from the brittle failure to the ductile fracture. The experiment results showed the CO-modified WPUs displayed excellent film-forming property, flexibility, and adhesion, which can be employed for constructing the eco-friendly, biodegradable, cationic, waterborne polyurethanes.

scholarly journals Performance of Castor Oil and Neem Oil as Metal Cutting Fluids in Drilling Inconel 718 Using MQL Technique on Tool Wear and Surface Roughness

2021 ◽  
Vol 2129 (1) ◽  
pp. 012070
Author(s):  
Syahilia Syahira Safie ◽  
Muhamad Nasir Murad ◽  
Tan Chye Lih
Keyword(s):  
Surface Roughness ◽  
Tool Wear ◽  
Inconel 718 ◽  
Castor Oil ◽  
Metal Cutting ◽  
Elevated Temperatures ◽  
High Hardness ◽  
High Strength ◽  
Cutting Fluids ◽  
Neem Oil

Abstract Inconel 718 is hard to cut material due to its high hardness, high strength at elevated temperatures, low thermal diffusivity and affinity to react with tool materials. The high temperature during machining results in aggressive tool wear and poor hole quality. Therefore, the application of metal cutting fluids (MCF) as a lubricating and cooling agent is very significant in the drilling of nickel-based superalloys such as Inconel 718. The present study embraces these issues by evaluating the performance of non-edible vegetable oils such as castor and neem oil under minimal quantity lubrication (MQL) conditions towards the tool wear and surface roughness. The drilling experiments were carried out using coated (TiAlN) carbide drill with diameter of 6 mm at different cutting speeds of 10 and 20 m/min and a constant feed of 0.015 mm/rev. The results of this study showed that castor oil significantly outperformed the neem oil in drilling performance regarding tool wear and surface roughness.

Preparation and Characterization of Castor Oil-Based Cationic Waterborne Polyurethane

2015 ◽  
Vol 1090 ◽  
pp. 3-7
Author(s):  
Kai Liu ◽  
Song Ping Zhang ◽  
Zhi Guo Su ◽  
Guang Hui Ma
Keyword(s):  
Castor Oil ◽  
Hard Segment ◽  
Waterborne Polyurethane ◽  
Gravimetric Analysis ◽  
Waterborne Polyurethanes ◽  
Hard Segment Content ◽  
Ir Analysis ◽  
Hard Segments ◽  
Polyurethane Dispersions

A variety of castor oil-based cationic polyurethane dispersions (PUDs) were synthesized. The effects of hard segment content on the properties of PUDs and the resulting polyurethane films were investigated by mastersizer, Fourier transform infrared (IR), thermal gravimetric analysis (TGA) and stress-strain test. As the hard segment content increased from 37.1 to 45.6 wt %, the particle size of the PUDs increased from 10 to 190 nm. IR analysis showed that hydrogen bonding between hard segments enhanced with the increase of hard segment content. For this enhancement the films had an increased tensile strength from 2.0 to 9.4 MPa and an improved glass transition temperature (Tg) from 48oC to 75oC. TGA showed the films were thermally stable up to 200oC and had biphasic degradation at around 330oC and 440oC. The versatile castor oil-based cationic waterborne polyurethanes are promising in applications as adhesives and coatings.

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