Sains Malaysiana 39(1)(2010): 73–76

 

Kesan Mangkin ke Atas Resin Fenolik Biopolimer dengan Menggunakan

Kaedah Pencecairan Lignin Soda

(Effect of Catalysts on Biopolymer Phenolic Resin by Liquefaction Process of Soda Lignin)

 

Sharifah Nabihah Syed Jaafar, Sarani Zakaria*, Rozaidi Rasid,

Nurul Ain Zulkifli & Ali Ahmadzadeh 

Pusat Pengajian Fizik Gunaan

Fakulti Sains dan Teknologi, Universiti Kebangsaan Malaysia

43600 UKM Bangi, Selangor D.E., Malaysia

 

Received: 16 February 2009 / Accepted: 13 July 2009

 

 

 

ABSTRAK

Proses pencecairan lignin soda telah dilakukan dengan menggunakan fenol dengan nisbah 1:3. Proses dilakukan selama 90 minit pada suhu 130oC dalam keadaan refluk. Hasil pencecairan iaitu pemfenolan lignin (PL) telah dianalisis dengan Spektrometer Inframerah Transformasi Fourier (FTIR), reometer dan analisis termogravimetri (TGA). Sampel yang disintesis dengan menggunakan asid hidroklorik sebagai mangkin memberikan keputusan yang terbaik. Analisis FTIR menunjukkan kehadiran kumpulan berfungsi yang signifikan seperti gelang aromatik, alkohol dan karbonil. Kesemua sampel PL mematuhi persamaan Arhenius dan bersifat pseudo-plastik. Peratus kehilangan berat sampel dan kadar penguraian sampel PL dipengaruhi oleh jenis mangkin yang digunakan. Sampel PL yang disintesis dikelaskan sebagai biopolimer resin fenolik.

 

Kata kunci: Fenol; lignin soda; pencecairan; resin fenolik

 

ABSTRACT

 

Liquefaction of soda lignin was carried using phenol with 1:3 ratio. The reaction time was 90 minutes at 130oC in the reflux system. The main product of liquefaction, phenolated lignin (PL), was analyzed by Fourier Transform Infrared Spectrometer (FTIR), rheometer and thermalgravimetri analyzer (TGA). The sample synthesized from hydrochloric acid as catalyst gave excellent characteristics. FTIR spectrum consists of essential functional groups such as aromatic ring, alcohol and carbonyl. All samples obeyed the Arhenius equation and showed pseudo-plastic properties. The percentage weight loss and degradation of PL samples were affected by the type of catalysts used. The synthesized PL was classified as biopolymer resin phenolic.

 

Keywords: Liquefaction; phenol; phenolic resin; soda lignin

 

 

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*Pengarang untuk surat-menyurat; email: sarani@ukm.my