Publication: Film formation process of natural rubber latex particles: roles of the particle size and distribution of non-rubber species on film microstructure
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Issued Date
2020-05-05
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ISSN
18734359
09277757
09277757
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2-s2.0-85079605548
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Mahidol University
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SCOPUS
Bibliographic Citation
Colloids and Surfaces A: Physicochemical and Engineering Aspects. Vol.592, (2020)
Suggested Citation
Manus Sriring, Adun Nimpaiboon, Sirirat Kumarn, Keiko Higaki, Yuji Higaki, Ken Kojio, Atsushi Takahara, Chee Cheong Ho, Jitladda Sakdapipanich Film formation process of natural rubber latex particles: roles of the particle size and distribution of non-rubber species on film microstructure. Colloids and Surfaces A: Physicochemical and Engineering Aspects. Vol.592, (2020). doi:10.1016/j.colsurfa.2020.124571 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/53631
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Title
Film formation process of natural rubber latex particles: roles of the particle size and distribution of non-rubber species on film microstructure
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Abstract
© 2020 Elsevier B.V. Natural rubber (NR) films from various mixing ratios of large- (LRP) and small rubber particles (SRP) were prepared through latex and solution casting methods. Film-forming behaviours of the resulting films were investigated by monitoring their surface characteristics using atomic force microscopy (AFM). When the SRP portion was higher, the surface of the latex-cast films was found to be smoother as smaller particles protruded out of the surface less than larger ones did. AFM phase micrographs revealed a hexagonal shape of packed rubber particles (RPs) of the LRP film, while the RPs in the other samples were sphere-like. After aging under ambient conditions, the packed RPs were flattened while retaining their RP boundaries, creating a supporting framework within the rubber matrix. On the contrary, when the rubber film was cast from a toluene solution, the characteristic of RP boundaries disappeared and became aggregates of the membrane components on the film surface. The latex-cast films performed much better in mechanical strength than the solution-cast films did due to the destruction of the supporting framework arisen from the non-rubber components at the RP boundaries of the solution-cast film. An inhomogeneous density distribution produced by the non-rubber aggregates in the latex-cast films was observed in small angle X-ray scattering measurements.