Rice husks are the hard protecting coverings of grains of rice. Several million tons
of rice husks, which can be considered as an agricultural waste, are obtained every year.
Precipitated silica is commonly used reinforcing filler in rubber industry. The objective of the
present work is to replace commercial silica commonly used in natural rubber industries with
high purity rice husk- nanosilica (RHNS). Nanosilica was obtained from rice husk through a
simple sol get method. The synthesized RHNS was characterized by FTIR, XRD, SEM, BET,
TEM etc. From BET analysis the surface area of RHNS was found to be 252m2/g which is
greater than that of commercial silica (CS). The particle size of RHNS was found to be 10-15
nm. The mechanical properties of natural rubber incorporated with RHNS shows better
results than commercial silica