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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1052Structural Characterization of Natural Rubber...

Structural Characterization of Natural Rubber Recent Research Advancements

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Abstract:

The micro-structure of the surface of Hevea brasiliensis latex particles has been found by the means of atomic force microscopy (AFM), confocal laser scanning microscopy (CLSM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), cryogenic transmission electron microscopy (cryo-TEM), and electrokinetics over a broad range of KNO₃ electrolyte concentrations (4-300 mM) and pH values (1-8). Based on the atomic force microscopy analysis of the fresh natural rubber latex, it could be estimated that the protein-lipid layer is covered with the rubber particles. The molecules in the particle were labeled with fluorescent Rhodamine (RB), and were monitored by CLSM. SEM and TEM were used to observe the surface of fresh natural rubber particles and were dyed by osmium tetroxide. Fourier Transform Infrared Spectroscopy (FTIR) has been used to characterize the nitrogenous groups in natural rubber and deproteinized natural rubber (DPNR). The FTIR and ¹H-NMR analysis of phosphatase-treated DPNR confirmed that the presence of mono- and diphosphate terminations without phospholipids was also unlikely owing to the presence of a methylene proton signal of an isoprene unit linked to mono- and diphosphate groups. The , [η] and Higgins’ k’ of DPNR decreased after being treated with lipase.

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Periodical:

Advanced Materials Research (Volume 1052)

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231-241

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https://doi.org/10.4028/www.scientific.net/AMR.1052.231

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Online since:

October 2014

Authors:

Long Mei Wu, Shuang Quan Liao*, Peng Qu, Rong Jie Zhou, Bo Xiang Wang

Keywords:

Microscopy, Natural Rubber Latex, Structural Characterization, Surface Nanostructure

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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