Zhang Z, Saunders R, Thomas C R
School of Chemical Engineering, University of Birmingham, Edgbaston, UK.
J Microencapsul. 1999 Jan-Feb;16(1):117-24. doi: 10.1080/026520499289365.
A micromanipulation technique has been developed to measure the bursting force of single dry microcapsules coated onto a surface, such as those normally used in carbonless copying paper. For measuring the bursting force of a given microcapsule, a single fine probe with a flat end about 10 microns in diameter was used to squeeze the microcapsule against a flat surface until it burst. The force being imposed on the microcapsule was measured by a transducer connected to the probe. The bursting force and diameter of single dry microcapsules in two samples, different in size and wall thickness, were measured by this technique. The bursting force of the microcapsules in one sample ranged from 50 to 220 microN and the diameter from 1.3 to 7.0 microns, whilst the bursting force in the other was from 20 to 175 microN and the diameter from 0.7 to 3.7 microns. This technique makes it possible to compare the mechanical strength of microcapsules made of different formulations, and to infer information about microcapsule mechanical properties.
已经开发出一种显微操作技术，用于测量涂覆在表面上的单个干燥微胶囊的破裂力，例如无碳复写纸中常用的微胶囊。为了测量给定微胶囊的破裂力，使用一个直径约10微米、端部平坦的单个细探针将微胶囊挤压在一个平坦表面上，直到它破裂。施加在微胶囊上的力由连接到探针的传感器测量。通过该技术测量了两个尺寸和壁厚不同的样品中单个干燥微胶囊的破裂力和直径。一个样品中微胶囊的破裂力范围为50至220微牛，直径为1.3至7.0微米，而另一个样品中的破裂力为20至175微牛，直径为0.7至3.7微米。该技术使得比较由不同配方制成的微胶囊的机械强度以及推断有关微胶囊机械性能的信息成为可能。
