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

 

Received: 22 July 2009 / Accepted: 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 

 

REFERENCES

 

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*Corresponding author; email: sarani@ukm.my

 

 

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