埃洛石自组装涂层在软质聚氨酯泡沫上的制备及其阻燃抑烟性能

doi:10.11901/1005.3093.2020.209

材料研究学报

2021, Vol. 35

Issue (6): 449-457 DOI: 10.11901/1005.3093.2020.209

研究论文

本期目录 | 过刊浏览

埃洛石自组装涂层在软质聚氨酯泡沫上的制备及其阻燃抑烟性能

潘颖, 赵红挺(

)

杭州电子科技大学材料与环境工程学院杭州 310018

Preparation of Halloysite Based Layer-by-Layer Coating on Flexible Polyurethane Foam and Its Performance of Flame Retardant and Smoke Suppression

PAN Ying, ZHAO Hongting(

)

College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China

引用本文:

潘颖, 赵红挺. 埃洛石自组装涂层在软质聚氨酯泡沫上的制备及其阻燃抑烟性能[J]. 材料研究学报, 2021, 35(6): 449-457.
Ying PAN, Hongting ZHAO. Preparation of Halloysite Based Layer-by-Layer Coating on Flexible Polyurethane Foam and Its Performance of Flame Retardant and Smoke Suppression[J]. Chinese Journal of Materials Research, 2021, 35(6): 449-457.

全文: PDF(19717 KB) HTML

摘要:

使用层层自组装技术在软质聚氨酯泡沫(PUF)表面制备含埃洛石的层层自组装涂层，使用扫描电子显微镜、能谱分析仪和锥形量热仪等手段对涂层进行表征，研究了涂层对PUF的热稳定性、燃烧性能及烟气释放性能的影响。结果表明：埃洛石基涂层由埃洛石、海藻酸钠和聚乙烯亚胺组成，能均匀地附着在PUF表面；涂层能延缓PUF在高温条件下的热解且使残炭量明显增多；三层埃洛石基涂层PU-3的热释放速率峰值、烟气释放速率峰值以及总烟气释放量比纯PUF(PU-0)分别降低了57.3%、58.9%和80.7%。这表明，埃洛石涂层能提高材料的热稳定和火灾安全性。

关键词 ：复合材料, 软质聚氨酯泡沫, 层层自组装法, 阻燃性

Abstract：

The halloysite based coating was fabricated on the surface of flexible polyurethane foam (PUF) using layer-by-layer self-assembled method, which then was characterized by scanning electron microscope (SEM) with energy-dispersive X-ray (EDX) spectrometers, thermogravimetric analysis and cone test. The effect of the prepared coating on the performance of the coated PUF, such as thermal stability, flame retardancy and smoke suppression were investigated. The results show that the coating is composed of halloysite, sodium alginate and polyethyleneimine. The halloysite particles were uniformly dispersed in the coating on PUF. Due to the presence of halloysite based coating, the decomposition of the coated PUF could be retarded to certain extent at high temperature, hence the char residues were significantly increased while decomposed. In comparison to the bare PUF, the peak heat release rate, peak smoke production rate and total smoke production were reduced 57.3%, 58.9% and 80.7% respectively for the PUF with halloysite based coating. This indicated that the coating (namely PU-3) could enhance the thermal stability and fire safety.

Key words： composite flexible polyurethane foam layer-by-layer self-assembly flame retardancy

收稿日期: 2020-06-04

ZTFLH:

TQ328.3

基金资助:浙江省自然科学(青年)基金(LQ19E030018)

作者简介: 潘颖，女，1990年生，博士

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https://www.cjmr.org/CN/10.11901/1005.3093.2020.209 或 https://www.cjmr.org/CN/Y2021/V35/I6/449

图1 层层自组装涂层的制备过程示意图

表1 溶液浓度、样品制备的层数和样品增重

图2 PU-0、PU-1、PU-2和PU-3的SEM照片

图3 PU-0和PU-3的EDX谱

图4 PU-0、PU-1、PU-2和PU-3在氮气气氛下的TG和DTG曲线

表2 修饰前后PUF的热重分析数据

图5 PU-0、PU-1、PU-2和PU-3的HRR、THR、SPR和TSR曲线

图6 PU-0、PU-1、PU-2和PU-3的Cone测试完炭渣和质量损失

图7 PU-1、PU-2和PU-3的Cone测试完炭渣扫描电子显微镜图

图8 PU-0(a、b)、PU-1(c、d、e)、PU-2(f、g、h)和PU-3(i、j、k)燃烧过程图，点燃后10 s(a、c、f、i)、点燃后30 s(b、d、g、j)和燃烧后炭渣(e、h、k)

图9 PU-0和PU-3气态裂解产物的3D热重-红外光谱

图10 PU-0和PU-3的总气态热解产物吸收峰

图11 修饰后软质聚氨酯泡沫的燃烧和烟气释放模型

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