Abstract
The present investigation reports the synthesis of chitosan wrapped hydroxyapatite (CS-Hap) nanorods by co-precipitation method. 1, 3 and 5 parts of CS-Hap were introduced into TPU-PDMS (T70-P30) blend matrix and the nanocomposites were prepared by solution mixing technique. The incorporation of CS-Hap enhanced the physico-mechanical properties of the blend matrix, mainly 130% improvement in tensile strength at 5 parts of CS-Hap addition. The dispersion and distribution of the CS-Hap in TPU-PDMS matrix was confirmed using FESEM and HRTEM techniques. The storage modulus and tan δ were improved with filler addition in all the nanocomposites. The XRD of nanocomposites reveals the intensity of crystalline planes correspond to CS-Hap was increased with filler addition and at 5 parts of CS-Hap, the crystallinity was enhanced by 40% as compared to the pristine TPU-PDMS blend. The CS-Hap promotes the thermal stability of nanocomposites due to the synergistic effect of physico-chemical interaction and superior crystallization behavior.
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