| In recent years, the rapid development of economy make our life take place great changes, people's require for life quality also increased, especially for the clothing regarded as “second skin”, in order to meet the demand of people, all kinds of functional clothing arise at the historic moment. “Thermostat clothing” is one of the functional clothing category developed faster and more popular among people, it's a new kind of functional textiles developed by combining phase change materials with fabrics, according to temperature change, the phase change materials in clothing can occur solid-liquid or solid-solid reversible change, the process of change will be accompanied by heat absorbing and releasing, the heat absorb and release process is automatic, reversible, infinite loop, therefore, it has a two-way thermostat function. Intelligent thermostat clothing helps keep the body surface temperature, the body dressed in comfortable while reducing air conditioning energy consumption, in line with “low-carbon green” requirements of modern society.Polyethylene glycol(PEG) is a polymer relative molecular weight between a certain scope, it can occur phase change in a hot and cold cycle, so this topic choose PEG as phase change material to develop intelligent thermostat fabrics. In the research process, using DSC method tested the phase change temperature and phase change enthalpy of single phase change materials PEG-600(reagent), PEG-800(reagent), PEG-1000(reagent), PEG-1000(medical), PEG-1500(reagent), through the analysis of DSC atlas we can learn that the phase change temperature of PEG-600 is 9.85?, phase change enthalpy is 91.5J/g; phase change temperature of PEG-800 is 47.7?, phase change enthalpy is 194.8J/g; phase change temperature of PEG-1000 is 48.05?, phase change enthalpy is 155.65J/g; phase change temperature of medical PEG-1000 is 41.7?, phase enthalpy is 176.7J/g; phase change temperature of PEG-1500 is 45.8?, phase change enthalpy is 178.95J/g; By using schroeder formula to calculate the theoretical minimum eutectic point between different PEG complex, through a large number of experiment, eventually determine choose PEG-800 and medical PEG-1000 as a single phase change materials for the preparation of the phase change temperature within 31~33? composite phase change materials, the optimal proportion is 1:9.The key point of this paper research focus on choosing 2D resin as cross-linking agent, study and analyze the cross-linking reaction of cotton fabrics and polyester/cotton fabrics. Due to the gain weight of fabric has a greater influence on the thermal activity, and 2D resin can make fabric strength decline, therefore, we choose weight gain rate and strength drop rate as the evaluation indexes. Using the single factor analytic method to analyze 2D resin concentration, catalyst Mg Cl2·6H2O/citric acid molar fraction ratio, curing temperature,curing time, then through orthogonal test method to determine the optimal cross-linking deposition process of cotton fabric: the concentration of 2D resin is 60g/L, Mg Cl2·6H2O/citric acid(10g/L) molar fraction ratio is 8:1, curing temperature is 140?, curing time is 3 minutes, liquor ratio is 1:20; the optimal cross-linking deposition process of polyester/cotton fabric: the concentration of 2D resin is 30g/L, Mg Cl2·6H2O/citric acid(3g/L) molar fraction ratio is 6:1, curing temperature is 140?, curing time is 165 seconds, liquor ratio is 1:20.We test the cross-linked cotton fabrics and polyester/cotton fabrics mechanical properties, thermal and moisture comfort, thermal activities. Specifically including the fabric thickness, weight, bursting strength, air permeability, moisture permeability, water absorption, thermal insulation, phase change temperature, phase change enthalpy etc. Come to the conclusion: the fabric treated by PEG and 2D resin can meet the requirements of knitting clothing performance, and the cross-linked fabric has a certain thermostat range, it can play a certain thermostat effect, so it is suitable to develop intelligent thermostat knitting fabrics. |
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