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