Preparation, Characterization And Applications Of Biocomposites Consist Of Chitosan Dispersed In Epoxidized Natural Rubber

• मुख्य लेखक: Idrees Mahmood, Luqman
• स्वरूप: थीसिस
• भाषा: अंग्रेज़ी
• प्रकाशित: 2016
• विषय: QD1-999 Chemistry
• ऑनलाइन पहुंच: http://eprints.usm.my/31355/

Sifat biodegradasi kitosan (CTS) adalah secara relatifnya amat lebih tinggi berbanding dengan sifat biodegradasi getah asli terepoksida (ENR). Biokomposit yang mengandungi CTS dan ENR berkemungkinan mempunyai sifat biodegradasi yang diingini dan sesuai untuk pelepasan sebatian-sebatian tertentu secara terkawal. Memandangkan ini, kitosan berasid (CTSAc) disediakan dengan menggunakan larutan 2% asid asetik dan seterusnya muatan CTSAc yang berbeza disebar dalam matrik ENR50 dan ENR25 bagi menghasilkan biokomposit zphrCTSAc-d-ENR50 dan zCTSAc-d-ENR25, di mana z adalah muatan CTSAc seperti 1.5, 2.5, 3.5, 5, 10, 15, 20 dan 40 phr. Bahan polimer permulaan dan biokomposit dicirikan dengan beberapa teknik analitikal seperti spektroskopi FT-NMR, spektroskopi FT-IR, TGA, DSC, SEM dan BET. Keputusan analisis data FT-IR, TGA dan DSC menunjukkan CTSAc tidak bercantum pada tetapi tersebar luas dalam matrik ENR50 dan ENR25 yang tersambungsilang separa. Biodegradability of chitosan (CTS) is relatively very high as compared to that of epoxidized natural rubber (ENR). Biocomposites containing CTS and ENR would likely to biodegrade desirably and are suitable for controlled release of compounds of interest. In view of this, acidified chitosan (CTSAc) was prepared using 2% acetic acid solution and then different loadings of CTSAc were dispersed in matrices of ENR50 and ENR25 to produce biocomposites designated as zphrCTSAc-d-ENR50 and zCTSAc-d-ENR25, respectively, wherein z refers to CTSAc loadings of 1.5, 2.5, 3.5, 5, 10, 15, 20 and 40 phr. The starting polymeric materials and resulting biocomposites were characterized using several analytical techniques such as FT-NMR spectroscopy, FT-IR spectroscopy, TGA, DSC, SEM and BET. Results of the analysis of FT-IR, TGA and DSC data reveal that CTSAc was not grafted to but dispersed widely in partially crosslinked matrices of ENR50 and ENR25.