Isolation And Characterization Of Cellulose Nanocrystals From Oil Palm Trunk

Lamaming, Junidah (2016) Isolation And Characterization Of Cellulose Nanocrystals From Oil Palm Trunk. PhD thesis, Universiti Sains Malaysia.

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Abstract

Kajian ini bertujuan untuk mengkaji sifat-sifat selulosa nanokristal (CNC) yang diekstrak daripada batang pokok kelapa sawit (Elaeis guineensis) (OPT). Enam jenis CNC diekstrak daripada OPT dengan menggunakan dua kaedah yang berbeza. Empat jenis CNC yang diperolehi daripada OPT secara keseluruhan iaitu nanokristal yang terhasil daripada bahan asal tanpa rawatan dan rawatan air panas serta daripada parenkima dan berkas vaskular OPT melalui kimo-mekanikal diikuti hidrolisis dengan asid sulfurik. Dua jenis nanokristal selulosa lagi diperolehi melalui pra-hidrolisis dan tanpa pra-hidrolisis air disediakan melalui pemulpaan soda diikuti pelunturan ozon dan dihidrolisis dengan asid hidroklorik. Sifat-sifat fizikal, dan kimia, sifat-sifat termal dan indeks penghabluran nanokristal selulosa yang masing-masing ditentukan menggunakan pengimbas mikroskop electron (SEM), penghantaran elektron mikroskop (TEM), potensi zeta dan penganalis unsur, Fourier transformasi inframerah (FTIR), analisis termal gravimetrik (TGA) dan analisis pembelauan sinar-X (XRD). This study investigated the properties of cellulose nanocrystal (CNC) isolated from oil palm trunk (Elaeis guineensis) (OPT). Six types of CNCs were extracted from OPT using two different methods. Four types of CNCs were derived from the OPT as a whole that is CNCs from raw and water treated and also from separated parenchyma and vascular bundle of OPT using chemo-mechanical followed by sulfuric acid hydrolysis. Two more types of CNC with and without water pre-hydrolysis were prepared by soda pulping followed by ozone bleaching and hydrolyzed with hydrochloric acid. Physical and chemical properties, thermal behaviour, and also crystallinity index of all obtained CNCs were determined using scanning electron microscopy (SEM), transmission electron microscopy (TEM), zeta potential, elemental analyzer, fourier transform infrared (FTIR), thermogravimetric analysis (TGA) and X-ray diffraction (XRD), respectively.

Item Type:	Thesis (PhD)
Subjects:	T Technology > T Technology (General) > T1-995 Technology(General)
Divisions:	Pusat Pengajian Teknologi Industri (School of Industrial Technology) > Thesis
Depositing User:	Mr Noorazilan Noordin
Date Deposited:	22 Feb 2017 01:09
Last Modified:	12 Apr 2019 05:25
URI:	http://eprints.usm.my/id/eprint/32168

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