標準編號:	GB/T 43820-2024
中文名稱:	紡織品 含相變材料的紡織品 蓄熱和放熱性能的測定
英文名稱:	Textiles—Textiles containing phase change materials—Determination of the heat storage and release capacity
中標分類:	W04    基礎標準與通用方法
行業分類:	GB    國家標準
ICS分類:	59.080.01 59.080.01    紡織產品綜合 59.080.01
發布機構:	國家市場監督管理總局 國家標準化管理委員會
發布日期:	2024-3-15
實施日期:	2024-10-1
標準狀態:	valid
翻譯語言:	英文
文件格式:	PDF
中文字符數:	10000 字
翻譯價格(元):	700.0
交付時間:	付款后 1 個工作日

Textiles - Textiles containing phase change materials - Determination of the heat storage and release capacity 1 Scope This document describes a method for determining the heat storage and release capacity of textiles containing phase change materials using differential scanning calorimetry (DSC). This document is applicable to all kinds of textiles containing phase change materials. 2 Normative references The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 6529 Textiles - Standard atmospheres for conditioning and testing GB/T 4669-2008 Textiles - Woven fabrics - Determination of mass per unit length and mass per unit area 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 phase change material a material that absorbs or releases heat energy in the form of latent heat within the temperature range at which the phase state of the material changes, thereby buffering the external temperature changes 3.2 phase change temperature peak temperature at which phase change occurs in phase change materials, namely the phase change temperature during melting or crystallization Note: Ideally, these two temperatures are the same, but there are differences in actual tests due to the common use of mixed materials. 3.3 extrapolated onset temperature temperature corresponding to the intersection point of the extrapolated baseline on the DSC curve and the tangent at the maximum slope of the curve corresponding to the beginning of the transition 3.4 peak temperature temperature corresponding to the maximum (or minimum) peak on the DSC curve 3.5 extrapolated end temperature temperature corresponding to the intersection point of the extrapolated baseline on the DSC curve and the tangent at the maximum slope of the curve corresponding to the end of the transition 3.6 enthalpy of phase change heat (J/g) absorbed or released by phase change materials during phase change under constant pressure Note: The heat absorbed during melting is called enthalpy of melting. The heat released during crystallization is called enthalpy of crystallization. 4 Principle Under the control of prescribed atmosphere and programmed temperature, the relationship between the heat flux rate difference between the input specimen and the reference specimen as a function of temperature and/or time is measured, so that the melting temperature, melting enthalpy, crystallization temperature and crystallization enthalpy of the specimen can be obtained. The melting temperature and melting enthalpy are used to characterize the phase change heat storage capacity of the specimen, and the crystallization temperature and crystallization melting value are used to characterize the heat release capacity of the specimen.

Foreword I 1 Scope 2 Normative references 3 Terms and definitions 4 Principle 5 Equipment and materials 6 Specimen preparation 7 Test steps 8 Calculation and expression of results 9 Test report

ICS 59.080.01 CCS W 04 中華人民共和國國家標準 GB/T 43820-2024 紡織品 含相變材料的紡織品 蓄熱和放熱性能的測定 Textiles - Textiles containing phase change materials - Determination of the heat storage and release capacity 2024-03-15發布 2024-10-01實施 國家市場監督管理總局 發布 國家標準化管理委員會 目次 前言 I 1 范圍 1 2 規范性引用文件 1 3 術語和定義 1 4 原理 2 5 設備和材料 3 6 試樣準備 4 7 試驗步驟 5 8 結果計算和表示 6 9 試驗報告 7 紡織品 含相變材料的紡織品 蓄熱和放熱性能的測定 1 范圍 本文件描述了使用差示掃描量熱法(DSC)測定含有相變材料的紡織品蓄熱和放熱性能的方法。 本文件適用于含有相變材料的各類紡織品。 2 規范性引用文件 下列文件中的內容通過文中的規范性引用而構成本文件必不可少的條款。其中,注日期的引用文件,僅該日期對應的版本適用于本文件;不注日期的引用文件,其最新版本(包括所有的修改單)適用于本文件. GB/T 6529 紡織品 調濕和試驗用標準大氣 GB/T 4669-2008 紡織品 機織物 單位長度質量和單位面積質量的測定 3 術語和定義 下列術語和定義適用于本文件。 3.1 相變材料phase change material 在材料發生相態變化的溫度范圍內，能夠以潛熱的形式吸收或釋放熱能，從而緩沖外界溫度變化的材料。 3.2 相變溫度phase change temperature 相變材料發生相態變化的峰溫度,即熔融相變溫度或結晶相變溫度. 注:理想情況下，這兩個溫度是相同的，但由于通常使用的為混合材料,實際測試中兩者存在差異。 3.3 外推起始溫度extrapolated onset temperature DSC曲線上外推基線與對應于轉變開始的曲線最大斜率處所作切線的交點所對應的溫度。 3.4 峰溫度peak temperature DSC曲線上峰達到的最大值(或最小值)所對應的溫度。 3.5 外推終止溫度extrapolated end temperature DSC曲線上外推基線與對應于轉變結束的曲線最大斜率處所作切線的交點所對應的溫度。 3.6 焓值enthalpy of phase change 恒壓下,相變材料在發生相態變化過程中所吸收或釋放的熱量(J/g)。 注:熔融時所吸收的熱量稱為熔融焓.結晶時所釋放的熱量稱為結晶焓。 4 原理 在規定的氣氛及程序溫度控制下，測定輸入試樣和參比樣的熱流速率差隨溫度和/或時間變化的關系，從而可得到試樣的熔融溫度、熔融焓值、結晶溫度、結晶焓值，以熔融溫度和熔融焓值表征試樣相變蓄熱性能，以結晶溫度和結晶熔值表征放熱性能。