Journal of Nanomedicine & Nanotechnology

Preparation of functionalized low molecular-weight natural rubber latex by photochemical degradation using TiO2 film coated on glass bead as a photocatalyst

24^th World Congress on Nanomaterials and Nanotechnology

July 12-13, 2018 Bangkok, Thailand

Warissara Suttibut and Jitladda Sakdapipanich

Mahidol University, Thailand

Posters & Accepted Abstracts: J Nanomed Nanotechnol

Abstract:

Natural Rubber (NR), derived from Hevea brasiliensis, has attracted a lot of attention due to its high Molecular-Weight (MW) and good mechanical properties. However, there are some limits of usage because it has no reactive terminal group leading to its low compatibility with other functional groups or additives. Recently, chemical modification was interested to modify and improve these lacks, for example, reducing the MW and introducing some functional groups resulting in the functionalized low MW NR (FLNR). The photochemical degradation process, the technique used to prepare the functionalized low MW NR (FLNR), looks more promising method due to the cleanliness, low energy/cost consumptions. In this work, FLNR was prepared in the presence of H2O2 in latex state and using TiO2 film coated on Hollow Glass Bead (TiO2-HGB) as a photo catalyst. The reaction was carried out under 1 kW of ultraviolet-A (UVA, λmax 365 nm) irradiation. The successful coating of TiO2 film on HGB was confirmed by Scanning Electron Microscopy fitted with element analysis accessory (SEM/EDX) and X-ray Diffraction Technique (XRD). In case of FLNR preparation, deproteinized natural rubber (DPNR) latex was used as a starting material. From the structural analysis, the obtained FLNR indicated the presence of hydroxyl, carbonyl and epoxide groups with no crosslinking reaction. The MW of FLNR reduced to around 0.34�105 g/mol. In addition, the TiO2-HGB could be re-used up to 4 times without the damage of film.

Biography :

Warissara Suttibut is currently pursuing her graduation from Department of Chemistry, Faculty of Science, Mahidol University, Thailand.

E-mail: jitladda.sak@mahidol.ac.th