Sains Malaysiana 39(3)(2010): 435–439

 

Mechanical and Optical Properties of CaCO3 Lumen-Loaded Paper: Effect of Polyethylenimine and Alum

(Sifat Mekanik dan Optik Kertas CaCO3 Berpengisi Lumen: Kesan Polietilinimina dan Alum)

 

Rohaya Othman1, Sarani Zakaria2*, Chin-Hua Chia2, Ainun Zuriyati3 & Nasharuddin Isa1

 

1Pusat Penyelidikan Mineral, Jabatan Mineral dan Geosains Malaysia, Jalan Sultan Azlan Shah 3140 Ipoh, Perak, Malaysia

 

2Pusat Pengajian Fizik Gunaan, Universiti Kebangsaan Malaysia 43600 Bangi, Selangor, Malaysia

 

3Institut Perhutanan Tropika dan Produk Hutan (INTROP), Universiti Putra Malaysia, 43400, Serdang Selangor, Malaysia

 

Diserahkan: 22 Julai 2009 / Diterima: 9 September 2009

 

ABSTRACT

 

Precipitated calcium carbonate fillers were loaded into the lumen of bleached mixed tropical hardwood pulp using polyethylenimine (PEI) and alum. Our results indicated that the addition of (PEI) increased the degree of loading of precipitated calcium carbonate (PCC) into the lumen of fibers. The degree of loading also increased with the addition of alum together with PEI. The mechanical strengths of the produced lumen loaded paper increased with the addition of PEI and alum. Meanwhile the mechanical strength without alum had slightly increased the mechanical strengths of the paper. Electron micrographs revealed that the PCC fillers were successfully loaded into the lumen of the fibers.

 

Keywords: Lumen loading; mechanical properties; optical properties; recipitated calcium carbonate; polyethylenimine

 

ABSTRAK

 

Pengisi kalsium karbonat termendak dimasukkan ke dalam lumen pulpa terluntur tropika campuran dengan menggunakan polietilinimina (PEI) dan alum. Keputusan menunjukkan pertambahan PEI telah meningkatkan darjah pemasukan kalsium karbonat termendak (PCC) ke dalam lumen fiber. Darjah pemasukan lumen ini juga meningkat apabila PEI dan alum digunakan serentak. Kekuatan mekanik kertas berpengisi lumen meningkat bagi kertas yang dihasilkan menggunakan PEI bersama alum. Namun tanpa penggunaan alum, kekuatan mekanik kertas mengalami sedikit peningkatan sahaja. Mikrograf menunjukkan pengisi PCC berjaya dimasukkan ke dalam lumen fiber.

 

Kata kunci: Kalsium karbonat termendak; pemasukan lumen; polietilinimina; sifat mekanik; sifat optik 

 

RUJUKAN

 

Alince, B. & Van de Ven, T.G.M. 1993. Kinetics of colloidal particle deposition on pulp fibers 2. Deposition of clay on fibers in the presence of Poly(ethylenimine). Colloids and Surfaces A: Physicochemical and Engineering Aspects 71: 105-114.

De la Orden, M.U. & Martinez Urreaga, J. 2006. Photooxidation of cellulose treated with amino compounds. Polymer Degradation and Stability 91: 2053-2060.

Goto, S. & Pelton, R. 1999. The influence of phenolic cofactors on the properties of calcium carbonate flocs formed with PEO. Colloids and Surface A: Physicochemical and Engineering Aspects 155: 231-239.

Klungness, J.H., Ahmed, A., Sutherland, N.R. & AbuBakr, S. 2000. Lightweight, high-opacity paper by fiber loading: Filler comparison. Nordic Pulp and Paper Research Journal 15: 345-350.

Middleton, S.R. & Scallan, A.M. 1985. Lumen-loaded paper pulp: Mechanism of filler-to-fibre bonding. Colloids and Surfaces 16: 309-322.

Middleton, S.R. & Scallan, A.M. 1989. Lumen loading of bleached pulps. Journal of Pulp and Paper Science 15: 229-235.

Middleton, S.R., Desmeules, J. & Scallan, A.M. 2003. Lumen loading with calcium carbonate Fillers. Journal of Pulp and Paper Science 29: 241-246.

Ulla, B.R. & Kerstin, O. 1986. The influence of mechanical pulp quality on the properties of filler-containing papers. Nordic Pulp and Paper Research Journal 4: 44-50.

Zakaria, S., Ong, B.H. & Van de Ven, T.G.M. 2004a. Lumen loading magnetic paper 1: flocculation. Colloids and Surfaces A: Physicochem. Eng. Aspects 251: 1-4.

Zakaria, S., Ong, B.H. & Van de Ven, T.G.M. 2004b. Lumen loading magnetic paper II: mechanism and kinetics. Colloids and Surfaces A: Physicochem. Eng. Aspects 251: 31-36.

Zakaria, S., Ong, B.H., Ahmad, S.H., Abdullah, M. & Yamauchi, T. 2005. Preparation of lumen loaded kenaf pulp with magnetite (Fe3O4). Materials Chemistry and Physics 89: 216-220.

 

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

 

 

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