施胶和未施胶磷酸钙玻璃纤维的实时溶解测定。

J D Rinehart, T D Taylor, Y Tian, R A Latour
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引用次数: 28

摘要

本研究的目的是开发一种高效的“实时”测量系统,能够直接测量可吸收玻璃纤维的溶解速率,以微克分辨率,并利用该系统来评估硅烷基施胶作为延迟纤维溶解过程的手段的有效性。所采用的可吸收玻璃纤维为磷酸钙(CaP),选用四甲基氧基硅烷作为施胶剂。采用e -玻璃纤维作为相对不降解的对照剂。未上浆的cap和上浆的cap在37℃和60℃的测试温度水平下都呈线性退化。采用常规的应用方法对CaP纤维束进行预处理,并在两种温度条件下使用四甲基氧基硅烷施胶,其失重率均未显著降低。未上浆的cap和上浆的cap失重率在60℃时都明显高于37℃(p < 0.02),这与溶解动力学的预期一致。在使用我们的系统测量磷酸盐玻璃纤维的实际失重率方面,我们研究的未上浆的cap纤维在37℃和60℃下分别以10.90 x 10(-09)和41.20 x 10(-09) g/min-cm(2)的速率溶解。考虑到所开发系统的性能验证,与两种测试温度下的斜率等于零相比,被测e -玻璃纤维的失重与时间图的斜率没有显著差异。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Real-time dissolution measurement of sized and unsized calcium phosphate glass fibers.

The objective of this study was to develop an efficient "real time" measurement system able to directly measure, with microgram resolution, the dissolution rate of absorbable glass fibers, and utilize the system to evaluate the effectiveness of silane-based sizing as a means to delay the fiber dissolution process. The absorbable glass fiber used was calcium phosphate (CaP), with tetramethoxysilane selected as the sizing agent. E-glass fiber was used as a relatively nondegrading control. Both the unsized-CaP and sized-CaP degraded linearly at both the 37 degrees C and 60 degrees C test temperature levels used. No significant decrease in weight-loss rate was recorded when the CaP fiber tows were pretreated, using conventional application methods, with the tetramethoxysilane sizing for either temperature condition. The unsized-CaP and sized-CaP weight loss rates were each significantly higher at 60 than at 37 degrees C (both p < 0.02), as expected from dissolution kinetics. In terms of actual weight loss rate measured using our system for phosphate glass fiber, the unsized-CaP fiber we studied dissolved at a rate of 10.90 x 10(-09) and 41.20 x 10(-09) g/min-cm(2) at 37 degrees C and 60 degrees C, respectively. Considering performance validation of the developed system, the slope of the weight loss vs. time plot for the tested E-glass fiber was not significantly different compared to a slope equal to zero for both test temperatures.

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