Fabrication and Properties of a Novel Porous Material from Biopolymer and Natural Rubber for Organic Compound Absorption
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Maleate poly (vinyl alcohol) (PVAM)-graft water soluble polymer with deproteinized natural rubber (DPNR) porous materials were prepared using the freeze drying technique. The effect of the water soluble polymer type (chitosan (CS) and gelatin (GT)) and the DPNR content was studied. The mechanical properties of the porous materials were improved by the addition of the DPNR. The results showed that the addition of the DPNR improved the water resistance of the porous material. Many micro-voids were formed after the PVAM was grafted with the water soluble polymers as observed under SEM, leading to changes in porosity and density. The highest number of micro-voids was found in the PVAM-graft-chitosan (sPVAM-g-CS) sample while the minimum number of microvoids was found in the maleate poly (vinyl alcohol) (sPVAM). The swelling ratio of the nPVAM significantly improved after the freeze drying process. The PVAM-graft-gelatin (sPVAM-g-GT) gave the maximum swelling ratio in water. After the DPNR was added to the sPVAM-g-GT, the pore size of the porous material significantly decreased and the size distribution became narrower. The moisture absorption, moisture content and swelling ratio of the porous material decreased after blending with the DPNR but the tear strength and rebound resilience of the porous material was enhanced. The macroporous material was able to be reused the maximum number of over 30 times as organic compound-absorbent material and it easily decomposed in nature.
KeywordsPoly (vinyl alcohol) Natural rubber Porous material Testing Chitosan Gelatin
The author gratefully acknowledges the financial support provided by Thammasat University Research Fund under the TU Research Scholar, Contract No.2/50/2018 and Center of Scientific Equipment for Advanced Research, Thammasat University and Center of Scientific Equipment, Faculty of Science and Technology Tammasat University. This study was supported by The Thailand Research Fund/Prince of Songkla University/Thammasat University for financial support (RSA5780018) and Thammasat University and The Royal Golden Jubilee Ph.D. Program (2.L.PS/53/C.1.N.XX).
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