Preparation and Characterization of TiO<inf>2</inf>-Coated Hollow Glass Beads for Functionalization of Deproteinized Natural Rubber Latex via UVA-Activated Photocatalytic Degradation
Issued Date
2023-10-01
Resource Type
eISSN
20734360
Scopus ID
2-s2.0-85173862019
Journal Title
Polymers
Volume
15
Issue
19
Rights Holder(s)
SCOPUS
Bibliographic Citation
Polymers Vol.15 No.19 (2023)
Suggested Citation
Nijpanich S., Nimpaiboon A., Rojruthai P., Park J.H., Hagio T., Ichino R., Sakdapipanich J. Preparation and Characterization of TiO<inf>2</inf>-Coated Hollow Glass Beads for Functionalization of Deproteinized Natural Rubber Latex via UVA-Activated Photocatalytic Degradation. Polymers Vol.15 No.19 (2023). doi:10.3390/polym15193885 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/90659
Title
Preparation and Characterization of TiO<inf>2</inf>-Coated Hollow Glass Beads for Functionalization of Deproteinized Natural Rubber Latex via UVA-Activated Photocatalytic Degradation
Author's Affiliation
Other Contributor(s)
Abstract
The photochemical degradation of natural rubber (NR) is a prevalent method used to modify its inherent properties. Natural rubber, predominantly derived from the Hevea Brasiliensis tree, exhibits an exceptionally high molecular weight (MW), often reaching a million daltons (Da). This high MW restricts its solubility in various solvents and its reactivity with polar compounds, thereby constraining its versatile applications. In our previous work, we employed TiO2 in its powdered form as a photocatalyst for the functionalization of NR latex. However, the post-process separation and reuse of this powder present substantial challenges. In this present study, we aimed to functionalize deproteinized NR (DPNR) latex. We systematically reduced its MW via photochemical degradation under UVA irradiation facilitated by H2O2. To enhance the efficiency of the degradation process, we introduced TiO2-coated hollow glass beads (TiO2-HGBs) as photocatalysts. This approach offers the advantage of easy collection and repeated reuse. The modified DPNR showed a reduction in its number-average MW from 9.48 × 105 to 0.28 × 105 Da and incorporated functional groups, including hydroxyl, carbonyl, and epoxide. Remarkably, the TiO2-HGBs maintained their performance over seven cycles of reuse. Due to their superior efficacy, TiO2-HGBs stand out as promising photocatalysts for the advanced functionalization of NR across various practical applications.