【摘要】 采用人工汗液模拟人体汗液,在连续和间歇式往复摩擦运动模式下研究汗液对正常人体皮肤、穿戴假肢皮肤以及残肢疤痕皮肤摩擦性能的影响,并模拟假肢穿戴环境研究汗液对皮肤摩擦舒适度的影响.结果表明:在法向载荷为0.2 N和0.7 N的连续和间歇式往复摩擦运动模式下,汗液均通过改变皮肤表面的物理化学性能而对皮肤的摩擦行为产生影响;在汗液逐渐干燥的过程中,皮肤的摩擦行为从粘着向相对滑移状态转变,摩擦系数变化经历从小到大再减小、最后达到稳定的过程;在法向载荷为8.0 N、模拟假肢穿戴环境的连续式往复摩擦运动模式下,汗液环境中的正常小腿皮肤、穿戴假肢皮肤和残肢疤痕皮肤的摩擦系数均大于干燥环境.根据皮肤在摩擦过程中的疼痛感、牵扯感和灼热感等同时提出皮肤摩擦舒适度概念,与干燥的假肢穿戴环境相比,汗液均加强了不同皮肤的摩擦不舒适感.更多还原

【Abstract】 The artifical perspiration was used to simulate human sweat.The effects of the artifical perspiration on the frictional properties of healthy human skin,wearing prosthetic socket skin and residual limb scar skin were investigated by using the continuous and intermissive reciprocal sliding frictional modes.The effect of the perspiration on the comfortness sensations of the limb skin was also investigated by simulating the prosthetic socket wearing conditions.The results showed that the artifical perspiration had the effects on the friction behavior of skin by modified the physicochemical properties of skin surface at the normal loads of 0.2 N and 0.7 N under the continuous and intermissive reciprocal sliding frictional modes.The friction behavior transited from sticking regime to relative sliding regime in the process of the perspiration drying out.The friction coefficient changed from small to peak value,then decreased until it reached stabile value.At normal load of 8.0 N of continuous reciprocal sliding frictional modes,the friction coefficients of healthy limb skin,wearing prosthetic socket skin and residual limb scar skin in the perspiration condition were higher than that in the dry condition.The concept of comfortness sensations of the skin concerning the pain,drag and heat was proposed and investigated.The perspiration brought more comfortless sensations to the volunteers comparing with the dry prosthetic socket condition.更多还原