MoS_(2)/MXene阻燃气敏棉织物的制备及其性能  

Preparation and properties of MoS_(2)/MXene flame retardant gas sensitive cotton fabrics

作　　者：关玉 王冬 郭一凡 付少海 GUAN Yu;WANG Dong;GUO Yifang;FU Shaohai(College of Textile Science and Engineering,Jiangnan University,Wuxi,Jiangsu 214122,China)

机构地区：[1]江南大学纺织科学与工程学院,江苏无锡214122

出　　处：《纺织学报》2024年第12期159-165,共7页Journal of Textile Research

基　　金：江苏省基础研究计划自然科学基金青年基金项目(BK20221093);湖北省纺织新材料及其应用重点实验室开放课题(FZXCL202202)。

摘　　要：针对易燃棉织物引发的室内火灾难以及时预警的难题,以植酸为掺杂剂,通过原位聚合法制备植酸掺杂聚吡咯改性棉织物,同时采用水热法合成MoS_(2)/Ti_(3)C_(2)T_(x)杂化纳米材料(MoS_(2)/MXene),然后通过浸渍法将其组装到改性织物上,得到CO_(2)响应的阻燃棉织物,研究其热稳定性、阻燃性能和CO_(2)气敏性,揭示阻燃与气敏机制。结果表明:MoS_(2)/MXene阻燃涂层使得棉织物的最大质量损失速率降低了55.2%,残炭量从9.6%明显提高到21.7%,提高了棉织物的热稳定性;MoS_(2)/MXene阻燃涂层使得棉织物的热释放速率峰值和总热释放从235.8 W/g和26.7 kJ/g分别降低到38.9 W/g和8.0 kJ/g,降幅分别高达83.5%和68.7%,这得益于植酸掺杂聚吡咯的P-N协同阻燃效应与MoS_(2)/MXene的片层阻隔效应;MoS_(2)/MXene阻燃涂层对CO_(2)气体具有很高的灵敏度,当CO_(2)质量浓度仅为180 mg/m^(3)时,电阻变化率高达49.9%,可监测火灾初起阶段燃烧气体中CO_(2)骤变。Objective To address the issue of indoor fire alarms caused by flammable cotton fabrics,MoS_(2)/MXene flame retardant gas sensitive cotton fabrics were prepared with dual functions of active early warning response and passive flame retardant protection.It is significant for protecting personal and property safety by detecting characteristic CO_(2)gas in the early stages of a fire and preventing the spread of flames.Method Phytic acid-doped polypyrrole modified cotton fabrics were prepared using in-situ polymerization with phytic acid as dopant.Meanwhile,MoS_(2)/MXene hybrid nanomaterials were synthesized via a hydrothermal method and then assembled onto the modified fabrics by impregnation method to obtain CO_(2)-responsive flame retardant cotton fabrics.The thermal stability,flame retardant performance and CO_(2)gas sensitivity were evaluated by thermogravimetric analysis,an FTT micro calorimeter and a digit multimeter,respectively.Results MoS_(2)/MXene flame retardant gas sensitive cotton fabrics were successfully prepared.The surface of the pure cotton fabric was initially smooth,but after modification with phytic acid-doped polypyrrole,it became rough and covered with numerous particles.This change is due to the in-situ synthesis of the doped polypyrrole particles adhering to the cotton fabric.After dipping,the surface of flame-retardant cotton fabric became even rougher with regular folds,indicating successful adsorption of the MoS_(2)/MXene nano-hybrid material.The MoS_(2)/MXene flame retardant coating reduced the maximum weight loss rate of cotton fabric by 55.2%and increased the residual carbon content from 9.6%to 21.7%,enhancing thermal stability.Additionally,the coating decreased the peak heat release rate and total heat release by 83.5%and 68.7%,respectively,from 235.8 W/g and 26.7 kJ/g to 38.9 W/g and 8.0 kJ/g.This improvement is attributed to the P-N synergistic flame retardant effect of the doped polypyrrole and the barrier effect of MoS_(2)/MXene.The fabrics also exhibited high sensitivity to CO_(2

关 键 词：二硫化钼 MXene 异质结构 阻燃预警 气敏机制 阻燃织物 功能性纺织品 

分 类 号：TS194.6[轻工技术与工程—纺织化学与染整工程]