Abstract

A novel P–N based, flame retardant ammonium salt of pentaethylenehexamine octa (methylene-phosphoric acid) (APHOMPA) was synthesized in this study. The structure of the prepared material flame retardant contains eight reactive ammonium phosphorus groups and was characterized by ¹H NMR, ¹³C NMR, ³¹P NMR, and (Fourier-transform infrared) FT-IR. The results showed that cotton fabrics finished with this flame retardant exhibited excellent flame retardancy and durability. The cotton fabrics finished with 30% APHOMPA solution had limiting oxygen index value 40.5%, and maintained 28.8% even after 50 laundering cycles. The FT-IR results showed that APHOMPA could be grafted on cellulose through P–O–C covalent bond. Vertical flammability, cone calorimetry, thermogravimetric (TG), and TG-IR results revealed the excellent flame retardancy of the finished cotton fabrics and suggested that the flame retardant mechanism of APHOMPA is a condensed phase process. Scanning electron microscopy results suggested the flame retardant entered the inner space of the cotton fabrics, and the X-ray diffraction results showed slight changes to the cotton crystal structure in the finishing process. The breaking strength, softness, and whiteness of finished cotton fabrics were sufficient, suggesting this retardant can be used to prepare treated cotton for multiple applications.

Graphic abstract

中文翻译：

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一种新型的基于P–N的具有多反应性基团的阻燃剂，用于处理棉织物

摘要

在这项研究中，合成了一种新型的基于PN的五亚乙基六胺八胺（亚甲基磷酸）阻燃铵盐（APHOMPA）。所制备的材料阻燃剂的结构包含八个反应性铵磷基，并通过¹ H NMR，¹³ C NMR，³¹表征。P NMR和（傅里叶变换红外）FT-IR。结果表明，用这种阻燃剂整理的棉织物表现出优异的阻燃性和耐久性。用30％APHOMPA溶液整理的棉织物的极限氧指数值为40.5％，甚至在50个洗涤周期后仍保持28.8％。FT-IR结果表明，APHOMPA可以通过P–OC–C共价键接枝到纤维素上。垂直可燃性，锥形量热法，热重法（TG）和TG-IR结果表明，成品棉织物具有优异的阻燃性，并表明APHOMPA的阻燃机理是凝结过程。扫描电子显微镜结果表明，阻燃剂进入棉织物的内部空间，X射线衍射结果表明，在整理过程中棉晶体结构略有变化。棉织物成品的断裂强度，柔软度和白度足够，这表明该阻燃剂可用于制备经处理的棉布以用于多种用途。

图形摘要