Cashew Nut Shell Liquid – Kraft LIGNIN in Friction CNSL Replacement
The key component of any car braking system is the disc brake pad. Stopping a 1300 kg car travelling at 100 km/hour in 5 seconds generates a power of over 100 kW in an area of just 50 cm2. All that heat is dissipated into the brake pads. Within seconds, temperatures can reach 600°C and in extreme cases even higher. Despite that, braking must be safe and smooth.
With an increasing focus on HSE (Health, Safety, Environment) these days, disc brake pad manufacturers are looking for alternatives to traditional raw materials which can give rise to health and safety issues. replacing phenol resin and cashew nut shell liquid with different types of lignin in friction material pad and then improving the friction coefficient and wear resistance.
The replacement of non-renewable fossil resources with a renewable organic carbon source is a grand challenge in terms of economic, ecological, and environmental motives. Among various renewable sources, the gainful utilisation of lignin seems a perfect choice both to the public and industrial domains for the eco-friendly production of industrially relevant chemicals, biofuels, and functional materials.
High Purity Kraft Lignin that is characterised by complex macromolecule containing high number of phenolic, aliphatic and carboxylic hydroxyl groups. This is a zero PAH environmentally friendly binder & is the most abundant natural aromatic polymer with very consistent quality that is achieved due to the owned wide spread plantation programme and each tree can be traced to its area of origin. Kraft Lignin is a renewable, wood-based, non-toxic alternative to fossil-based materials. This is extracted and converted, that holds the promise to transform the way we use our natural resources to make products.
Do you care for your environment while you do business?
Extracting the maximum value from biomass enhancing your business potential. The true potential of bio-based chemicals is a treasure we are working on. This can help you manufacture environmentally friendly products leading to a sustainable future. Therefore, it has recently become important subject to active research, to develop new and more sophisticated uses for it. This rising technological wave with most promising results belongs today to the World’s Megatrends.
Why to replace Cashew Nut Shell Liquid with Lignin?
In general, when braking an automobile, the temperature applied to the brake pad rises up to 300-400°C. At this time, fillers act as a resistor to the heat. Therefore, to be used as filler, a material’s thermal stability is extremely important. According to the TGA data, CNSL, which is widely used as commercial ingredient for filler, starts to decompose at approximately 427°C. Similarly, as seen in the data collected, all the technical lignin decomposition also proceeded in the range of 300-400°C. However, when comparing TG curves, while CNSL is degraded rapidly at 400°C, lignin begin to decompose at approximately 200°C, and decomposition proceeds very slowly, terminating at nearly 800°C, which indicates the possibility of greater thermal stability of lignin as fillers.
Eco-friendly brake pad materials were prepared and chemically characterised using several analytical methods in order to evaluate their suitability for incorporation into PF resin and CNSL resin. When lignin was used as a binder in the brake pads, the Lignin added in the formulations was shown to have very advantageous effects in terms of stabilising the friction coefficient and improving impact strength and thickness swelling in water. When lignin was used as a filler in brake pads, it demonstrated the best performance in every parameter tested.
We offer our commercial lignin, tailored to your specific needs.
- CNSL Resins for friction industry
- Asphalting for Infrastructure
- Dyes as Dispersant
- Bio-based chemicals, adhesives & Many Others in Development