Recent study has found the use of castor oil as antistatic and anticorrosive materials.
Antistatic property is defined as the fast dissipation of static electricity (static charge). It is evaluated using two measures – surface resistance and half-life. The lower the surface resistance (Ω), the higher the antistatic property; and the shorter the half-life (s), the higher the antistatic property.
A previous study conducted by scientists from Korea in 2004, has found that waterborne -polyurethane coating materials containing conductive polyaniline blend films showed reduced antistatic half-life.
Now, scientists from Korea and India have prepared castor oil-based waterborne polyurethane/polyaniline (COWPU/PAni) conducting polymer blend films. The waterborne polyurethane synthesized from isophorone diisocyanate was reacted with castor oil to form prepolymers. Also, COWPU/PAni hybrid dispersions were synthesized to make different conductive composites.
Characteristic studies showed that COWPU/PAni conducting blend films could be used as antistatic and anticorrosive coating materials.
Recent study has found a new source of biodiesel from castor oil which has less viscosity than the original castor oil.
Castor oil cannot be used as such for biodiesel production due to its high viscosity. Hence scientists from Singapore have found an alternative method to produce low viscosity biodiesel from castor oil.
By chemical modification of ricinolein in castor oil and methyl Ricinoleate, new products called ketone-containing glycerides were obtained. These ketone containing triglycerides were used for the production of biodiesel.
The biodiesel obtained by this method was found to have low viscosity.
Thus, vehicles can now run with a fuel which has less viscosity.
Here’s an interesting derivative possibility of an antibacterial product from ricinoleic acid, a derivative of castor oil.
Contamination is a big issue in any environment. It affects each and every stage in all the processes we do from manufacturing a product to its maintenance (shelf life). To control contamination, a suitable compound with a high antibacterial activity is to be added in an ongoing process.
A well-known example of compounds with antibacterial activity are naturally occurring phenolic compounds.
Now scientists from India have developed 7 novel ricinoleic acid glycosides having antibacterial activity using Koenigs–Knorr glycosylation reaction. On the whole, 28 ricinoleic acid glycosides were developed and their antibacterial activities were analysed. Seven of them were found to show promising wide spectrum antibacterial activity against gram positive bacteria.
Among the 7 compounds, two compounds namely mannopyranosyl- and the arabinofuranosyl derivatives were found to be effective against various non-clinical/clinical, overexpressed/resistant strains of Staphylococcus aureus and other gram positive bacteria such as Bacillus subtilis and Micrococcus luteus. It was found that the presence of sugar and its structure and the methyl ester protection of the carboxylic moiety of ricinoleic acid are responsible for these compounds to be bioactive.
Now industries looking for other potential compounds with antibacterial activity could go for these ricinoleic acid glycosides.
Wish to know more about Ricinoleic Acid – see here. Or other castor derivatives – see here.
A sealant is an elastomeric material that allows for 25% to 50% movement. They are used to level, fill gaps, seal holes and provide bonding and protection. Sealants are made by using either silicone or polyurethane.
Polyurethane sealants are formed by reacting an isocyanate component with amines, polyols or other active hydrogen compounds. Some polyurethane sealants are flame retardant where flame retardants such as ammonium polyphosphate are used along with the polymers to obtain the desired character. So far, only specialty polyols like polycarbonate polyols, polycaprolactone polyols, polybutadiene polyols, and polysulfide polyols have been used to make polyurethane sealants.
Now, Chinese researchers have developed a novel ricinoleic acid based phosphorus and nitrogen-containing flame retardant polyols (FRPE) for polyurethane sealants. The flame retardant polyols were characterized by different characterization techniques.
Flame retardant polyurethane sealants (FR-PUS) were prepared by curing flame retardant polyols with methylene diphenyl diisocyanate (MDI-50). The flame retardant properties of the polyurethane sealants were investigated using limiting oxygen index (LOI), cone calorimeter testing (CCT) and thermogravimetric analysis (TGA).
Results showed that flame retardant polyols could enhance the thermal stability and flame retardancy of polyurethane sealants without adding any other flame retardant.
Now, industries manufacturing polyurethane sealants could produce them in a renewable way which will be environmental friendly.
Scientists at zonal agricultural and horticultural research station of the University at Hiriyur have developed a disease resistant and high yield variety of castor seed called HCH-6 (Hybrid Castor Hiriyur) which is a fusion of DPC-9 and TMV-6 varieties.
The yield of the variety is said to be around 18 quintals per hectare while it is around 13-14 quintals per hectare in other existing varieties.
Scientists from India performed an experiment to analyse the differential longevity of castor germplasm conserved under uncontrolled storage conditions. Seed longevity of 2961 castor accessions stored for <1-19 years under ambient conditions was investigated to analyse the loss in vigour by the castor seed and also determine the genetic variability for seed longevity.
Results showed that castor seed retained 40% germination even after 19 years of storage. All the accessions maintained 100% germination for one year, but from the second year, differential germination percentage was observed among accessions stored for the same duration.
Scientists from Brazil conducted an experiment to evaluate the replacing levels of soybean meal with castor seed meal in diets for lambs on the productive and metabolic parameters. The lambs were fed with varying concentrations of castor seed meal replacing soybean meal. The experimental setup was completely randomized with five treatments and ten replicates.
The experimental results showed that despite the decreased intake, nutrient digestibility and nitrogen balance, castor seed meal could replace 50% of soybean meal without changing the lamb’s blood parameters or performance.
Scientists from Nigeria performed an experiment to analyse the effect of period of fermentation on the nutrients of castor oil seeds. Castor oil seed was dehulled, boiled and wrapped in a banana leaf. The wrapped seed was kept in a basket and allowed to ferment for four days. The package was unwrapped daily to remove 250g of fermenting cotyledon and dried at 60°C to terminate the fermentation process.
Results showed that the fermented castor oil seeds exhibited increase in moisture, crude protein, crude fibre, carbohydrate, potassium and zinc. The lysine content also significantly increased on the fourth day.
Scientists from Mexico conducted an experiment to evaluate the seed and oil production, yield and quality of biodiesel produced from eleven wild genotypes of castor oil plant in Mexico. Seed and oil production was evaluated in experimental plots at field level and the quality of biodiesel produced was also evaluated.
Results showed that the seed production varied between 937.1 kg/ha and 56.3 kg/ha indicating the feasibility to produce castor oil in the north-east region of Mexico. Quality tests conducted for biodiesel showed some potential for use blended with petroleum diesel.
Scientists from Iran have developed a new method to produce biodiesel from castor oil without using extra petrochemical methanol. The new method uses bio refinery setup where bioethanol is used instead of fossil-based methanol to produce biodiesel.
Results showed that the optimum biodiesel yield was 85% achieved at a temperature of 62.5°C with an ethanol: oil ratio of 0.29:1.