Liu Zhenhui, Li Jiao, Zhao Xihui, Li Zichao, Li Qun
College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China.
College of Life Sciences, Qingdao University, Qingdao 266071, China.
Nanomaterials (Basel). 2018 Oct 25;8(11):875. doi: 10.3390/nano8110875.
A polyester fabric, coated with calcium alginate and nano-calcium borate composites (CAB-PL), was fabricated by a post-cross-linking method, with remarkable improvement of flame retardancy and thermal stability, as compared with the original polyester fabric (PL). The mechanical properties of CAB-PL and PL were studied, and characterizations and tests including Fourier transform infrared spectrum (FTIR), scanning electron microscopy (SEM), limiting oxygen index (LOI), cone calorimetry (CONE) and thermogravimetric analysis (TGA) were employed to evaluate the flame retardancy and thermostability. The test results of CAB-PL showed excellent mechanical strength and anti-dripping properties. In comparison with PL, TGA results indicate that the presence of surface-coated composites produced more char residue and can effectively inhibit the heat transmission, and the LOI value of CAB-PL was improved from 25 to 33. Moreover, CONE results show that 88.65% reduction of total smoke release (TSR) values was induced by the presence of CAB. In addition, the possible pyrolysis mechanisms for CAB-PL have been proposed based on the results of pyrolysis-gas chromatography⁻mass spectrometry (Py-GC-MS) analysis. The combined results can provide useful information for understanding the flame retardant mechanisms of alginates as well. In summary, polyester fabric was upgraded by coating it with the calcium alginate/nano-calcium borate, thus achieving extraordinary flame retardancy and thermal stability for various applications within the textile industry.
采用后交联法制备了一种涂覆有海藻酸钙与纳米硼酸钙复合材料（CAB-PL）的聚酯织物，与原始聚酯织物（PL）相比，其阻燃性和热稳定性有显著提高。研究了CAB-PL和PL的力学性能，并采用傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）、极限氧指数（LOI）、锥形量热法（CONE）和热重分析（TGA）等表征和测试手段来评估其阻燃性和热稳定性。CAB-PL的测试结果显示出优异的机械强度和抗滴落性能。与PL相比，TGA结果表明表面涂覆的复合材料产生了更多的残炭，能有效抑制热传递，且CAB-PL的LOI值从25提高到了33。此外，CONE结果表明，CAB的存在使总烟雾释放（TSR）值降低了88.65%。另外，基于热解气相色谱-质谱联用（Py-GC-MS）分析结果，提出了CAB-PL可能的热解机理。这些综合结果也可为理解海藻酸盐的阻燃机理提供有用信息。总之，通过用海藻酸钙/纳米硼酸钙对聚酯织物进行涂覆，实现了其升级，从而在纺织工业的各种应用中获得了卓越的阻燃性和热稳定性。
