High-Efficiency and Durable Flame Retardant Cotton Fabric with Good Physical and Mechanical Properties by Layer-by-Layer Assembly Polyethylenimine/Phytic Acid Coating

ABSTRACT

In this study, intumescent flame retardant coating of polyethylenimine/phytic acid (PEI/PA) with gradient structure was constructed on cotton fabric through a facile layer-by-layer (LBL) assembly method. The LOI value of coated cotton fabric reached over 40%, indicating excellent flame retardancy. Reasonable controlling the LBL assembly process of PEI/PA coating brought less influence to the physical properties of cotton fabrics. And the coated cotton fabric revealed good flame retardant washing durability. Thermogravimetric analysis results of coated cotton fabrics showed that PEI/PA flame retardant coating changed the thermal decomposition process and promoted char formation revealing the obviously condensed phase flame retardant action. SEM images of char residues revealed that PEI/PA flame retardant coating promoted to form the intumescent flame retardant (IFR) char layer showing obvious IFR action. This research provides novel strategy for the development of high-efficiency flame retardant cotton fabric with good durability and physical properties using a simple LBL assembly method.

摘要

本研究采用简便的层层(LBL)自组装法在棉织物上构建了具有梯度结构的聚乙烯亚胺/植酸(PEI/PA)膨胀型阻燃涂层。PEI/PA涂层棉织物的LOI值达到40%以上, 表现出优异的阻燃性能。合理控制PEI/PA涂层的LBL组装过程, 可减小对棉织物物理性能的影响, 且涂层棉织物具有良好的阻燃耐洗性能。对涂层棉织物的热重分析结果表明, PEI/PA阻燃涂层改变了棉织物的热分解过程和促进其成炭, 表现出明显的凝聚相阻燃作用。残炭的SEM结果表明, PEI/PA阻燃涂层促进形成膨胀型阻燃(IFR)炭层, 表现出明显的膨胀阻燃作用。本研究为利用简单的LBL组装方法开发具有良好耐久性和物理性能的高效阻燃棉织物提供了新的策略。

KEYWORDS:

• Cotton fabric
• flame retardant
• durability
• gradient structure
• phytic acid
• layer-by-layer assembly

关键词:

• 棉织物
• 阻燃
• 耐久
• 梯度结构
• 植酸
• 层层自组装

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the Natural Science Foundation of Anhui Province [No. 1908085QE225], the Key Research and Development Project of Anhui Province [No. 202004a06020023], the Scientific Research Fund of Anhui Polytechnic University [No. Xjky2020047] and the Innovation Team Project of Anhui Polytechnic University and the Young and middle-aged Top Talent Project of Anhui Polytechnic University.