Sains Malaysiana 32: 67-77 (2003)                                                                                Sains Fizis dan Gunaan /

 Physical & Applied Science

Pencangkukan Stirena ke atas Gentian Selulosa

Kapas dengan menggunakan Sinar-γ

(Grafting of styrene onto cotton cellulose fabric using γ-rays)

Khiew Poi Sim & Md. Soot Hj. Ahmad

Program Sains Nuklear

Fakulti Sains dan Teknologi

Universiti Kebangsaan Malaysia

43600 UKM Bangi, Selangor D.E., Malaysia

ABSTRAK

Pemkopolimeran cangkukan monomer stirena ke atas gentian selulosa kapas secara penyinaran serentak telah dilakukan dengan menggunakan sinar-γ dari sumber ⁶⁰Co. Kesan kepekatan monomer stirena, atmosfera penyinaran dan rawatan awal kain kapas dengan asid, alkali serta beberapa jenis garam ionik terhadap darjah pencangkukan telah dikaji. Kepekatan 35% larutan stirena didapati memberi darjah pencangkukan yang maksimum. Keadaan atmosfera penyinaran juga mempengaruhi yil cangkukan yang diperolehi terutamanya dengan kehadiran gas yang bersifat penggarut radikal. Rawatan awal kain kapas dengan asid, alkali dan garam ionik didapati memberi kesan yang berbeza terhadap hasil cangkukan yang diperolehi dan bergantung kepada jenis ion yang wujud dalam sistem.

ABSTRACT

Graft co-polymerization of monomer styrene onto cotton cellulose by the mutual irradiation technique was carried out using gamma ray from a ⁶⁰Co source. Effect of styrene monomer concentration, irradiation atmosphere and pretreatment to cotton cellulose fabric with acid, alkali and several ionic salts respectively on the degree of grafting have been studied. The highest grafting seems occurred at 35% of styrene concentration. It has been found that irradiation atmosphere also affect the grafting yield especially in the presence of gases, which can act as radical scavenger. Pretreatment to cotton fabric with acid, alkali and ionic salts yield different results and depend on ions existed in the system.

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