On the Softness and Defibrillation Character of Chrysotile Asbestos

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The surface areas of bulk chrysotile asbestos and mechanically opened fibers were measured for samples with different degrees of softness. The results were evaluated in order to find interrelationships between softness, defibrillation character and morphology of chrysotile.<BR>It was revealed that the softness of chrysotile asbestos has correlation to the surface area of bulk chrysotile which is effected mainly by the cementing area between close packed fibrils and by the amount of interfibrillar material. The softness also relate directly to the defibrillation character which was shown by the relationship between the degree of surface area increase and treating time.<BR>From these discussion, it was concluded that the softness of chrysotile asbestos indicate the easiness of defibrillation when a external force is applied to the fiber bundle, and the easiness of defibrillation is dependent on the bonding strength of individual fiber, which is effected mainly by the existence of interfibrillar material.
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