GMA改性磷酸腺苷的制备及其对棉织物的阻燃整理

为了提高磷酸腺苷单体在棉织物上的接枝改性程度及其阻燃效果，采用甲基丙烯酸缩水甘油酯（GMA）对一磷酸腺苷（AMP）、二磷酸腺苷（ADP）、三磷酸腺苷（ATP）进行改性，制得三种带有不饱和双键的阻燃单体AMP-m-GMA、ADP-m-GMA、ATP-m-GMA；然后通过紫外光接枝法将三种阻燃单体分别接枝到棉织物上，制备光接枝AMP-m-GMA、ADP-m-GMA和ATP-m-GMA阻燃棉织物；对三种阻燃单体进行了结构表征和热稳定性分析，并探究了三种阻燃单体光接枝阻燃棉织物的热稳定性、阻燃性能、燃烧行为和残炭结构。结果表明，三种磷酸腺苷通过GMA环氧基开环引入不饱和双键，且具有良好的热稳定性。相比于原棉织物，三种阻燃棉织物的最大热降解速率分别降低了60.0%、52.0%、60.0%，极限氧指数由16.1%分别提升到25.4%、27.4%、26.4%，织物热释放速率分别下降了15.09%、60.47%、37.82%，说明三种磷酸腺苷阻燃单体均有助于棉织物形成致密炭层，阻止热量扩散，获得良好的阻燃效果。其中，光接枝ADP-m-GMA阻燃棉织物的增重率可达22.4%，燃烧后损毁长度由30 cm缩短至14.2 cm，表现出更优异的阻燃性能。

Preparation of GMA modified adenosine phosphate and its application to flame retardant finishing of cotton fabric

In order to improve the grafting modification degree and flame retardant effect of adenosine phosphate monomer on cotton fabric, glycyl methacrylate (GMA) was used to modify adenosine monophosphate (AMP), adenosine diphosphate (ADP) and adenosine triphosphate (ATP), obtaining three kinds of flame retardant monomers of AMP-m-GMA, ADP-m-GMA and ATP-m-GMA with unsaturated double bond. Subsequently, three flame retardant monomers were grafted onto cotton fabric via UV photografting to prepare photografted flame retardant cotton fabrics with AMP-m-GMA, ADP-m-GMA and ATP-m-GMA, respectively. The structure characterization and thermal stability analysis of three flame retardant monomers were carried out, and the thermal stability, flame retardant performance, combustion behavior and structure of residual carbon of three photografted flame retardant cotton fabrics were investigated. The results showed that unsaturated double bonds were introduced onto three adenosine phosphate monomers with good thermal stability through ring-opening reaction of epoxy group of GMA. Compared with pristine cotton fabric, the maximum thermal degradation rate of three kinds of flame-retardant cotton fabrics decreased by 60.0%, 52.0% and 60.0%, the limit oxygen index increased from 16.1% to 25.39%, 27.38% and 26.38%, and the heat release rate of the fabrics decreased by 15.09%, 60.47%, 37.82%, respectively. These results implied that three flame retardant adenosine phosphate monomers could help cotton fabric form dense carbon layer, prevent heat diffusion, and obtain good flame retardant effect. Among three photografted flame retardant cotton fabrics, the weight gain rate of ADP-m-GMA flame retardant cotton fabric could reach 22.4% and the damage length after burning was reduced from 30 cm to 14.2 cm, demonstrating better flame retardancy.