Kesan lilin ke atas sifat hidrofobik permukaan daun pisang

Pengekstrakan lilin dilakukan ke atas dua jenis daun pisang iaitu Musa parasidiaca L. (pisang berangan) dan Musa acuminata Colla (pisang lemak manis) dengan merendamkan daun pisang ke dalam larutan kloroform bertujuan untuk mengenal pasti sifat-sifat hidrofobik dan pembersihan kendiri. Larutan hasil dikeringkan dan diikuti dengan proses penghabluran. Mikroskop imbasan elektron pancaran medan (FESEM) digunakan untuk melihat profil morfologi kedua-dua jenis sampel lilin dan elemen kimia yang diperoleh adalah karbon dan silikon melalui serakan x-ray (EDX). Takat lebur lilin Musa parasidiaca L. dan Musa acuminata Colla adalah 80.2oC dan 82.9oC manakala sudut sentuhan air pada permukaan lilin Musa parasidiaca L. dan Musa acuminata Colla adalah 137.3o dan 132.8o. Sudut sentuhan bagi kedua-dua sampel lilin melebihi 90o menunjukkan daun pisang adalah bersifat hidrofobik yang mana Musa parasidiaca L. menunjukkan nilai sudut sentuhan yang lebih tinggi dan sesuai untuk aplikasi biomimetik. Pencirian yang terdapat pada lilin daun pisang boleh diaplikasikan di dalam industri salutan permukaan dan tekstil

Microstructural effects of banana leaf on adhesion and self cleaning behaviour

A recent discovery on banana leaf that has high potential as the lotus effect has intrigued further investigation particularly on the mechanism of its self-cleaning behaviour. In this paper, the adhesive and the contact angle effects of the banana leaf, named Musa Parasidiaca L. (berangan) surface in determining the self-cleaning effect is discussed especially at high temperatures. Samples were slid against a heated metal plate at two different temperatures; 100°C and 200°C, under different loads; 0.5 kg and 1 kg. Correlation between the leaf morphologies, adhesion force and contact angles were discussed. Measurements were carefully carried out by using the various pressure scanning electron microscopy (VP-SEM), an atomic force microscope (AFM) and a drop shape analysis (DSA). The adhesion force and contact angle were decreased at the highest temperature and load. The adhesion force was found to be reduced from 5.6 nN to 1.9 nN and the value of contact angles was decreased from 108.9° to 99.4°. In short, it is hope that the new discovery of this study can shed light on its importance to mankind particularly in surface modifications for applications at higher temperature

Microstructural effects of banana leaf on adhesion and self cleaning behaviour

A recent discovery on banana leaf that has high potential as the lotus effect has intrigued further investigation particularly on the mechanism of its self-cleaning behaviour. In this paper, the adhesive and the contact angle effects of the banana leaf, named Musa Parasidiaca L. (berangan) surface in determining the self-cleaning effect is discussed especially at high temperatures. Samples were slid against a heated metal plate at two different temperatures; 100°C and 200°C, under different loads; 0.5 kg and 1 kg. Correlation between the leaf morphologies, adhesion force and contact angles were discussed. Measurements were carefully carried out by using the various pressure scanning electron microscopy (VP-SEM), an atomic force microscope (AFM) and a drop shape analysis (DSA). The adhesion force and contact angle were decreased at the highest temperature and load. The adhesion force was found to be reduced from 5.6 nN to 1.9 nN and the value of contact angles was decreased from 108.9° to 99.4°. In short, it is hope that the new discovery of this study can shed light on its importance to mankind particularly in surface modifications for applications at higher temperature

Microstructural effects of banana leaf on adhesion and self cleaning behaviour

A recent discovery on banana leaf that has high potential as the lotus effect has intrigued further investigation particularly on the mechanism of its self-cleaning behaviour. In this paper, the adhesive and the contact angle effects of the banana leaf, named Musa Parasidiaca L. (berangan) surface in determining the self-cleaning effect is discussed especially at high temperatures. Samples were slid against a heated metal plate at two different temperatures; 100°C and 200°C, under different loads; 0.5 kg and 1 kg. Correlation between the leaf morphologies, adhesion force and contact angles were discussed. Measurements were carefully carried out by using the various pressure scanning electron microscopy (VP-SEM), an atomic force microscope (AFM) and a drop shape analysis (DSA). The adhesion force and contact angle were decreased at the highest temperature and load. The adhesion force was found to be reduced from 5.6 nN to 1.9 nN and the value of contact angles was decreased from 108.9° to 99.4°. In short, it is hope that the new discovery of this study can shed light on its importance to mankind particularly in surface modifications for applications at higher temperature