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Thermostable natural rubber with cellular structure using thin multiwalled carbon nanotubes.

Rubber is an essential material in areas such as the transportation, civil engineering and construction, electronics, and medical equipment industry because of its unique properties, particularly its elasticity. Specifically, rubber with an extremely low elastic modulus (in the 1–100 MPa range) has an excellent ability to revert to its original shape after being stretched or compressed. Such elasticity enables rubber to be used in tires, hoses, belts, sealants, and packing materials. At present, the total amount of rubber consumed in the world is about 2000 tonnes per year. However, the market share of natural rubber (NR) is limited to 40 %. With progress in green technology, the consumption of NR is expected to increase rapidly, because NR is one of the most green yet versatile engineering materials. For example, its manufacturing energy is one-tenth that of synthetic rubber because NR is a naturally produced, highmolecular-weight hydrocarbon. In addition, the rubber tree provides a wide variety of medical supplies, fertilizer powder, and timber; a rubber tree also has the ability to absorb 9000 tonnes of CO2 per year. [2]