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分裂毛发的生物力学

David Taylor¹, Ellen Barton¹, Isobel Duffy¹

¹Trinity Centre for Biomedical Engineering, Trinity College Dublin, University of Dublin, Dublin, Ireland.

Interface focus

|July 31, 2024

概括

研究人员开发了新的测试,以了解分开的末端. 低质量的头发内部和广泛地分裂,与健康的头发不同,揭示了关键的机械差异.

科学领域:

发型机械师发型机械师
材料科学是一种材料科学.
生物物理学的生物物理.

背景情况:

分裂端是常见的头发问题,但人们对底层机制的了解很少.
现有的实验室测试不能充分模拟导致头发分裂的条件.

研究的目的:

开发和验证新的实验室测试,以量化分裂的头发.
为了研究容易分裂的头发和健康的头发之间的机械差异.

主要方法:

开发了三个新型测试:循环拉力,移动循环和移动循环疲劳.
测试人类头发丝从一个分开头的受试者 (低质量) 和一个控制对象 (不分开) 的试验.
在模拟理条件下比较脱发机制和分裂传播.

主要成果:

与对照头发相比,低质量的头发在移动循环疲劳测试中出现的失败周期要少得多.
低质量头发的裂纹是来自内部的,并纵向传播,而对照头发的裂纹是来自外部的,并保持短.
漂白控制头发改变了它的机械行为,使它与低质量的头发相似.

结论:

新的测试提供了一种可量化的方法来研究头发分裂机制.
内部分裂启动和纵向传播是低质量,容易分裂的头发的特征.
机械应力,特别是纵切,在发毛中产生微裂和分裂传播方面发挥着关键作用.

关键词:

休息时间是休息时间.疲劳疲劳疲劳疲劳疲劳疲劳头发头发头发头发头发分裂分裂分裂分裂分裂分裂强度强度强度强度强度强度强度强度强度强度强度强度强性性性性

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