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采用硝酸和氢氧化钠溶液对聚氧亚甲基(POM)纤维进行液相氧化与刻蚀处理,研究不同处理浓度和处理时间对POM纤维力学性能和表面形貌的影响。通过instron强力测试表明,POM纤维耐碱不耐酸,在稀酸与强碱下控制处理时间能达到表面糙化的效果。IR测试表明酸碱处理未能使POM纤维表面活化,通过SEM观察到不同浓度和处理时间下POM纤维表面的氧化和刻蚀情况。研究表明20%浓度的稀硝酸在30min左右能够在不大损害纤维强力的情况下对POM纤维表面糙化,30%浓度以上的强碱会对纤维强力产生影响,而在30%浓度以下的碱性溶液中能够长期保持稳定的力学性能且能使表面糙化。
The polyoxymethylene (POM) fibers were oxidized and etched by nitric acid and sodium hydroxide solution. The effects of different concentration and treatment time on the mechanical properties and surface morphology of POM fibers were studied. The strong test by instron shows that POM fiber is alkali-resistant and not acid-resistant, and the surface roughening effect can be achieved by controlling the processing time under the conditions of dilute acid and alkali. IR test showed that acid-base treatment failed to activate the surface of POM fiber. The oxidation and etching of POM fiber surface under different concentration and treatment time were observed by SEM. Studies have shown that dilute nitric acid at 20% concentration can roughen the surface of POM fiber without damaging the fiber strength for about 30 minutes. Strong bases above 30% can affect the fiber strength. However, when the concentration is below 30% The long-term stability of the mechanical properties of the solution can be sexual and roughen the surface.