Preparation of "Three Sources in One" Leather-based Intumescent Flame Retardant and Its Application in Thermoplastic Polyurethane Elastomer

Jing Ma; Yue Gong; Guan-qi Zheng; Teng Fu; Xiu-li Wang

doi:10.11777/j.issn1000-3304.2024.24109

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Preparation of "Three Sources in One" Leather-based Intumescent Flame Retardant and Its Application in Thermoplastic Polyurethane Elastomer

Research Article | 更新时间：2024-12-24

- Preparation of "Three Sources in One" Leather-based Intumescent Flame Retardant and Its Application in Thermoplastic Polyurethane Elastomer
- Acta Polymerica Sinica Vol. 55, Issue 11, Pages: 1575-1585(2024)
- 作者机构：
  
  四川大学化学学院环保型高分子材料国家地方联合工程实验室环境友好高分子材料教育部工程研究中心成都 610064
- 作者简介：
  
  Xiu-li Wang, E-mail: xiuliwang1@163.com, wangxiuli@scu.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2024.24109
  CLC：
- CSTR：32057.14.GFZXB.2024.7260
- Received：11 April 2024，
  
  Accepted：2024-05-15，
  
  Published Online：25 July 2024，
  
  Published：20 November 2024
- 稿件说明：
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马晶, 龚岳, 郑冠祺, 付腾, 汪秀丽.“三源一体”皮革基膨胀阻燃剂的制备及其在热塑性聚氨酯弹性体中的应用研究. 高分子学报, 2024, 55(11), 1575-1585

Ma, J.; Gong, Y.; Zheng, G. Q.; Fu, T.; Wang, X. L. Preparation of “three sources in one” leather-based intumescent flame retardant and its application in thermoplastic polyurethane elastomer. Acta Polymerica Sinica,2024, 55(11), 1575-1585
马晶, 龚岳, 郑冠祺, 付腾, 汪秀丽.“三源一体”皮革基膨胀阻燃剂的制备及其在热塑性聚氨酯弹性体中的应用研究. 高分子学报, 2024, 55(11), 1575-1585 DOI： 10.11777/j.issn1000-3304.2024.24109. CSTR： 32057.14.GFZXB.2024.7260.

Ma, J.; Gong, Y.; Zheng, G. Q.; Fu, T.; Wang, X. L. Preparation of “three sources in one” leather-based intumescent flame retardant and its application in thermoplastic polyurethane elastomer. Acta Polymerica Sinica,2024, 55(11), 1575-1585 DOI： 10.11777/j.issn1000-3304.2024.24109. CSTR： 32057.14.GFZXB.2024.7260.

摘要

将皮革固体废弃物(LW)直接回收成为高附加值的产品一直是困扰制革工业的难题. 本文工作以富含氮/碳元素的LW作为炭源/气源，聚磷酸铵(APP)为酸源，通过静电作用在水溶液中制备了“三源一体”皮革基膨胀阻燃剂PA@LW@APP，并通过熔融共混方式将其引入到热塑性聚氨酯弹性体(TPU)中. 研究发现，当添加量为5 wt%时，TPU5便能达到UL-94 V-0级. 在锥形量热测试中，阻燃TPU能够形成阻隔外部火源和可燃气体的膨胀炭层，表现出优异的抑热、抑烟及成炭能力. 含有15 wt% PA@LW@APP的阻燃TPU的峰值热释放速率、总热释放量和总烟释放量相比于纯TPU分别降低了71.1%、36.0%和51.4%. 另外，PA@LW@APP的包覆型结构使得它在TPU基材中分散良好，不易团聚，所制备的阻燃TPU均保持了良好的拉伸韧性. 本工作通过绿色简单的方法不仅实现了皮革废弃物的高值化利用，而且还赋予了TPU优异的阻燃性能.

Abstract

Direct recycling of leather waste (LW) into high value-added products has always been a challenge for the leather industry. In this study

a "three sources in one" leather-based intumescent flame retardant (PA@LW@APP) was prepared in aqueous solution by electrostatic interaction

using LW rich in nitrogen/carbon elements as a carbon/gas source and ammonium polyphosphate (APP) as an acid source. Then PA@LW@APP was introduced into thermoplastic polyurethane elastomer (TPU) by melt blending. It was found that when the addition content of PA@LW@APP is 5 wt%

TPU5 can achieve UL-94 V-0 rating. The flame retardant TPU forms an intumescent char layer during cone test that blocked the external fire source and combustible gas

showing excellent heat suppression

smoke suppression and char-forming abilities. Compared with pure TPU

the peak heat release rate (pHRR)

total heat release (THR) and total smoke production (TSP) of flame retardant TPU containing 15 wt% PA@LW@APP were reduced by 71.1%

36.0% and 51.4%

respectively. In addition

the encapsulated structure of PA@LW@APP made it well dispersed in the TPU substrate and not easy to agglomerate

and the flame retardant TPU maintained good tensile toughness. This work not only realizes the high-value recycling of leather waste through a green and simple method

while also giving TPU excellent flame retardant properties.

关键词

Keywords

references

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