摘要
以水性聚氨酯为成膜材料,没食子酸(GA)改性的MXene(MX@GA)为低发射率材料,热膨胀微球(TEMs)为发泡剂,制备了集低发射率和隔热性能于一体的红外隐身涂层,并将其用于聚氨酯合成革的制备。使用紫外-可见分光光度计(UV-Vis)和原子力显微镜(AFM)等对MX@GA的形貌和结构稳定性进行表征,同时还对涂层红外发射率、热导率、柔软度、回弹性和透水汽性进行了测试。结果表明:GA接枝到MXene表面,提高了MXene的结构稳定性。当MX@GA含量为10%时,所制备的涂层红外发射率降低至0.273;微球发泡赋予了涂层均匀的多孔结构,与未添加TEMs相比,添加3%TEMs后,涂层的热导率从0.183 W/(m·K)降低至0.042 W/(m·K),柔软度和回弹性提高20%以上,透水汽性提高至49.66 g/(m^(2)·h);得益于低发射率和隔热的协同效应,在60℃加热板上,红外热成像仪检测合成革表面温度与环境温度接近(温差仅有10℃),表现出优异的红外隐身性能。
Using waterborne polyurethane as film-forming material,gallic acid(GA)-modified MXene(MX@GA)as low emissivity material,and thermal expandable microspheres(TEMs)as foaming agent,the infrared stealth coating integrating low emissivity and thermal insulation was prepared and employed in the manufacture of polyurethane synthetic leather.The morphology and structural stability of MX@GA were characterized using ultraviolet-visible spectrophotometer(UV-Vis)and atomic force microscope(AFM),etc.And the infrared emissivity,thermal conductivity,softness,resilience and water vapor permeability of the coating were also tested.It was found that graft of GA improved the structural stability of MXene.When the MX@GA content was 10%,the infrared emissivity of the coating decreased to 0.273.Microsphere foaming endowed the coating with a uniform porous structure,when 3%TEMs was added,the thermal conductivity of the coating decreased from 0.183 W(/m·K)to 0.038 W(/m·K),softness and resilience were increased by more than 20%,and water vapor permeability was improved to 49.66 g(/m^(2)·h).Benefiting from the synergistic effect of low emissivity and heat insulation,the surface temperature detected by infrared thermal imager of the synthetic leather on a 60℃heating plate was close to the ambient temperature(the temperature difference was only 10℃),showing excellent infrared stealth performance.
作者
魏欢
罗海航
向均
范浩军
WEI Huan;LUO Haihang;XIANG Jun;FAN Haojun(The Key Laboratory for Leather Chemistry and Engineering of Ministry of Education,Sichuan University,Chengdu 610065,China;The State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,China)
出处
《涂料工业》
CAS
CSCD
北大核心
2024年第12期25-33,共9页
Paint & Coatings Industry
基金
国家自然科学基金(22178238)
浙江省尖兵领雁攻关计划(2022C01190)。
关键词
MXene
热膨胀微球
红外隐身
涂层
合成革
MXene
thermal expandable microspheres
infrared stealth
coating
synthetic leather
