锡掺杂介孔分子筛在木材阻燃中的烟气转化作用

doi:10.3724/SP.J.1077.2013.12382

无机材料学报 ›› 2013, Vol. 28 ›› Issue (5): 532-536.DOI: 10.3724/SP.J.1077.2013.12382 CSTR: 32189.14.SP.J.1077.2013.12382

锡掺杂介孔分子筛在木材阻燃中的烟气转化作用

夏燎原¹, 吴义强¹, 胡云楚^{1, 2}

(中南林业科技大学 1. 材料科学与工程学院; 2. 理学院, 长沙 410004)

收稿日期:2012-06-17 修回日期:2012-08-20 出版日期:2013-05-10 网络出版日期:2013-04-22
作者简介:夏燎原(1977–), 男, 博士. E-mail: xly1516@126.com
基金资助:
国家自然科学基金(31200438, 31070496, 31170521);国家林业公益性行业科研重大专项(201204704);“十二五”国家科技计划项目(2012BAD24B03);中南林业科技大学引进人才科研项目(104-0217)

Study on Smoke Catalytic Conversion by Sn-substituted Mesoporous Silica Composite in Wood Fire Retardance

XIA Liao-Yuan¹, WU Yi-Qiang¹, HU Yun-Chu^{1, 2}

(1. College of Material Science and Engineering, Central South University of Forestry and Technology Changsha 410004, China; 2. College of Science, Central South University of Forestry and Technology, Changsha 410004, China)

Received:2012-06-17 Revised:2012-08-20 Published:2013-05-10 Online:2013-04-22
About author:XIA Liao-Yuan. E-mail: xly1516@126.com
Supported by:
Nature Science Foundation of China (31200438, 31070496, 31170521);National Forestry Public Welfare Industry Research Project (201204704);Twelfth Five-Year National Guideline for Science & Technology Projects (2012BAD24B03);Research Foundation for Talented Scholars of Central South University of Forestry & Technology (104-0217)

摘要/Abstract

摘要：

以水热晶化法合成了锡掺杂的介孔分子筛, 并采用XRD、N₂吸附-脱附、TEM、锥形量热等测试手段对其介观结构和物化性质进行了表征, 同时研究了该分子筛与聚磷酸铵(APP)复合在木材燃烧过程中的阻燃性能和烟气转化作用。结果表明, 该分子筛具有二维六方(P6mm)介观结构、高的比表面积, 与APP复合使用能有效降低杨木的热释放速率(HRR)、总热释放量(THR)、烟生成速率(SPR)和总烟释放量(TSP), 可促进炭的生成, 表现出优异的阻燃与抑烟特性。同时, 该分子筛对阻燃过程中释放的烟气具有转化作用, 能够有效地降低CO的浓度, 具有减毒作用。

关键词: 介孔分子筛, 木材阻燃, 催化氧化, 抑烟减毒

Abstract:

Sn-substituted mesoporous SiO₂ (Sn-SiO₂) was prepared by hydrothermal crystallization and characterized with XRD, N₂ adsorption and TEM techniques. The results showed that the prepared materials exhibited an ordered mesostructures and high surface areas. The effect of poplar treated with Sn-SiO₂ and APP on the combustion and smoke was studied by CONE calorimeter. The results show that the heat release rate (HRR), the total heat release (THR), the smoke production rate (SPR) and the total smoke production (TSP) decreased remarkably while the charring drastically increases, indicating that the compound of Sn-SiO₂ and APP have excellent inflame-retarding and smoke inhibition effects for poplar. It is because APP, as catalyst, leads to the formation of carbon and the silica enhances the thermal stability of carbon at a high-temperature. Meanwhile, the Sn-SiO₂ shows high catalytic activity for smoke and toxic gas produced by wood combust, which can reduce the concentration of CO effectively and avoid further casualties.

Key words: mesoporous silica, fire resistance of wood, catalytic oxidation, smoke inhibition and conversion

中图分类号:

TQ351

夏燎原, 吴义强, 胡云楚. 锡掺杂介孔分子筛在木材阻燃中的烟气转化作用[J]. 无机材料学报, 2013, 28(5): 532-536.

XIA Liao-Yuan, WU Yi-Qiang, HU Yun-Chu. Study on Smoke Catalytic Conversion by Sn-substituted Mesoporous Silica Composite in Wood Fire Retardance[J]. Journal of Inorganic Materials, 2013, 28(5): 532-536.

图/表 6

Table 1 The preparation conditions and combustion parameters of the treated poplar powder by CONE test

Sample	SiO₂/g	Sn-SiO₂/g	APP/g	Poplar/g	THR/(MJ·m^-2)	TSP/m²	^am-COY/(kg·kg^-1)	^bm-CO₂Y/(kg·kg^-1)
s-0	0	0	0	20	23.58	0.7302	0.0354	1.4522
s-1	0	0	2.4	20	7.18	0.2764	0.1236	0.5805
s-2	0.8	0	1.6	20	12.64	0.1062	0.0740	0.9916
s-3	0	0.8	1.6	20	11.75	0.0413	0.0468	0.9502

图1 水热晶化法合成的介孔分子筛和Sn掺杂的介孔分子筛的XRD图谱

Fig. 1 XRD patterns of the mesoporous SiO2 and Sn-SiO2 synthesized by hydrothermal crystallization methods

图2 水热晶化法合成的介孔分子筛和Sn掺杂的介孔分子筛的N2吸附-脱附曲线和孔径分布曲线

Fig. 2 Nitrogen adsorptions/desorption isotherms and pore size distributions for the mesoporous SiO2 and Sn-SiO2

图3 水热晶化法合成的Sn掺杂介孔分子筛的不同放大倍率TEM照片

Fig. 3 Different magnification TEM images of the mesoporous Sn-SiO2 synthesized by hydrothermal crystallization methods

图4 杨木和经APP、介孔分子筛和锡掺杂介孔分子筛阻燃处理样品的THR(a), HRR (b), TSP (c)和SPR (d)曲线

Fig. 4 THR (a), HRR (b), TSP (c) and SPR (d) curves of poplar and poplar treated with APP and the mesoporous SiO2 and Sn-SiO2 composites

图5 杨木和经APP、介孔分子筛和锡掺杂介孔分子筛阻燃处理样品的COP (a)和CO2P (b)曲线

Fig. 5 COP (a) and CO2P (b) curves of poplar and poplar treated with APP and the mesoporous SiO2 and Sn-SiO2 composites

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锡掺杂介孔分子筛在木材阻燃中的烟气转化作用

Study on Smoke Catalytic Conversion by Sn-substituted Mesoporous Silica Composite in Wood Fire Retardance

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