基于镀银纱线的加热织物制备及其热力学性能研究与仿真

发布时间：2018-11-27 13:55

【摘要】：智能加热服装能够为生活和工作在低温环境下的人们提供积极保暖,改善穿着者的热舒适性,而且局部积极保暖服装服饰能够有效缓解患有风湿性疾病患者的疼痛。柔性加热元件是智能加热服装的重要组成部分,然而目前还未见到文献对柔性加热织物的安全性、舒适性和加热性能进行系统的研究。基于此,本文采用自主开发的织物热性能测试仪对镀银纱线、集成镀银纱线的加热织物和服装的加热性能(包括平衡温度、升温速率、功率密度和表面温度均匀性等指标)进行了系统的研究。本文首先研究了镀银纱线的热稳定性、耐水洗性和表面的热场分布与负载电压之间的曲线等性能指标。实验选用的三种镀银纱线(试样一和试样二:28.2tex和19.7tex的镀银缝纫线,试样三:9.7tex的镀银纱线),实验结果显示了随着老化时间和老化温度的增加,镀银纱线断裂强力和导电性都会降低。在老化温度为80℃,老化时间为360 h时,试样一、试样二和试样三的电阻分别从30Ω,37.78Ω 和 82.36 Ω 升高到 128.65Ω,2187.24Ω 和 561.52 Ω,其增幅分别为 328.83%,5689.99%和581.82%。在80℃,100℃,120℃度环境温度下执行360 h的老化之后,三种试样的断裂强度分别降低了 26.24%,26.46%和27.19%。在经过10次水洗之后,三种试样的电阻分别升高了 34.37%、130%和294.2%。在5V负载电压下,三种试样的平衡温度分别为65.47℃,48.82℃和27.63℃。为了评估镀银纱线的安全性,有必要了解镀银纱线在不同负载下其内部和表面温度场的变化规律,因此,我们构建了镀银纱线的热力学数学模型和有限元模型,依据测试的数据,采用根据实际测试经验值拟合散热系数h值的方法对模型中应用到的散热系数值进行推导,比传统依据平均值的方法模型计算结果偏差的标准方差降低了至少1.59%,计算结果偏差部分小于7.7%,实验结果显示了构建模型的有效性,该模型能够为加热织物和加热服装的设计开发提供了实验和理论依据。为了探索最优的镀银纱线加热织物的集成方法和制备工艺,采用了针织、机织和刺绣三种方法制备柔性加热织物,三种方法制备的加热织物的平衡温度与加热织物的功率密度密切相关,在5V负载电压下,三种方法制备的试样平衡温度都能达到60度以上,镀银纱线的间隔越小,表面温度越均匀,刺绣法能够将镀银纱线以任意的方式继承到不同的织物基底上,针织和机织加热织物的制备工艺相对更为复杂,对镀银纱线的集成方式控制不如刺绣法,并且机织加热织物的制备会浪费更多的镀银纱线。随后,将镀银纱线加热织物与聚吡咯涂层加热织物的性能进行了对比,实验结果显示聚吡咯涂层加热织物的耐水洗性能比镀银纱线加热织物差。
[Abstract]:Intelligent heating clothing can provide active warmth for people living and working in low temperature environment, improve the thermal comfort of the wearer, and local active warm clothing can effectively alleviate the pain of patients with rheumatic diseases. Flexible heating element is an important part of intelligent heating clothing. However, there is no systematic research on the safety, comfort and heating performance of flexible heating fabric. Based on this, the heating properties of silver-plated yarn, the heating fabric of silver-plated yarn and clothing (including equilibrium temperature, heating rate, heating rate) were tested by the self-developed fabric thermal performance tester. Power density and surface temperature uniformity are studied systematically. In this paper, the thermal stability, washing resistance and the curve between the surface thermal field distribution and load voltage of silver-plated yarns are studied. Three kinds of silver-plated yarns (sample 1 and sample 2: silver-plated sewing thread of 28.2tex and 19.7tex, sample 3: silver-plated yarn of 9.7tex), the experimental results show that with the increase of aging time and aging temperature, The breaking strength and conductivity of silver-plated yarn will decrease. When the aging temperature is 80 鈩，

本文编号：2361022