为探明SiO2对速生林杨木的增强效果，采用溶胶-凝胶法和浸渍硅溶胶法制备了SiO2／杨木复合材料。用SEM、XRD、FTIR、热重分析等研究了SiO2／杨木复合材料微观形貌、结构组成及热降解性能。实验结果表明：SiO2分布于杨木导管、木纤维以及木材细胞间隙之间，采用溶胶-凝胶法制得的复合材料两相结合更紧密细致，填充效果更好；SiO2／杨木复合材料的衍射峰强度和结晶度均呈现减小趋势，且采用溶胶-凝胶法制备的复合材料纤维素（100）晶面衍射强度和结晶度显著减小；SiO2的引入改变了木材的热性能，SiO2／杨木复合材料的热解温度从420℃降低至380℃，缩短了高温热解反应温度区间，促进炭化阶段进行，在一定程度上保护杨木基材。
In order to explore the improving effect of SiO2 on the properties of fast-growing plantation poplar wood, two kinds of SiO2/poplar wood composites were prepared by sol-gel and impregnating silicasol method, respectively. The performances of microscopic morphology, structure composition and thermal degradation about the composites were characterized and evaluated by SEM, XRD, FTIR and thermal analysis. The results show that SiO2 has a wide distribution in the vessels, wood fibers and gaps between wood cells in the wood substrate, and its contact with wood cell wails in the composites fabricated by means of sol-gel is tighter which presents more effective filling and combination. The diffraction intensity and crystallinity in wood cellulose of SiO2/poplar wood composites exhibit a decreasing trend resulting from the introduction of SiO2, and the variation of （100） crystal surfaces in the composite fabricated by sol- gel is more obvious. The pyrolysis temperatures of SiO2/poplar wood composites decrease from 420 ℃ to 380 ℃ with a narrowing of pyrolysis reaction, accelerating the occurs of wood carbonization to protect wood substrate from burnout adequately in some extent.
参考文献
| [1] | 刘一星, 赵广杰. 木质资源材料学 [M]. 北京: 中国林业出版社, 2004: 7-10. |
| [2] | Kartal S N, Yoshimura T, Imamura Y J. Modification of wood with Si compounds to limit boron leaching from treated wood and to increase termite and decay resistance [J]. International Biodeterioration & Biodegradation, 2009, 63: 187-190. |
| [3] | Owens C W, Shortle W T, Shigo A L. Prelininary evaluation of silicone tetrachloride as a wood preservative [J]. Holzforschung, 1980, 34: 223-225. |
| [4] | Saka S, Sasaki M, Tanahashi M. Wood-inorganic composites prepared by the sol-gel process(Ⅰ): Wood-inorganic composites with porous structure [J]. Mokuzai Gakkaishi, 1992, 38(11): 1043-1049. |
| [5] | Ogiso K, Shiro S. Wood-inorganic composites prepared by sol-gel process (Ⅳ): Effects of chemical bonds between wood and inorganic substances on property enhancement [J]. Mokuzai Gakkaishi, 1994, 40(10): 1100-1106. |
| [6] | 陈志林, 王 群, 左铁镛, 等. 无机质复合木材的复合工艺与性能 [J]. 复合材料学报, 2003, 20(4): 128-132. |
| [7] | Carsten M, Holger M. Modification of wood with silicon compounds: Treatment systems based on organic silicon compounds—A review[J]. Wood Sci Technol, 2004, 37: 453-461. |
| [8] | Steffen D, Holger M, Carsten M. Wood modification with alkoxysilanes [J]. Wood Sci Technol, 2004, 38: 555-566. |
| [9] | Tshabalala M A, Kingshott P, Vanlandingham M R, et al. Surface chemistry and moisture sorption properties of wood coated with multifunctional alkoxysilanes by sol-gel process [J]. J Appl Polym Sci, 2003, 88: 2828-2841. |
| [10] | Liesbeth D V, Jan V D B, Joris V A. Impact of organosilicon treatments on the wood-water relationship of solid wood [J]. Holzforschung, 2010, 6: 463-468. |
| [11] | Vetter L D, Cnudde V, Masschaele B, et al. Detection and distribution analysis of organosilicon compounds in wood by means of SEM-EDX and micro-CT [J]. Materials Characterization, 2006, 56: 39-48. |
| [12] | Donath S, Militz H, Mai C. Weathering of silane treated wood [J]. Holz Roh Werkst, 2007, 65: 35-42. |
| [13] | Carsten M, Holger M. Modification of wood with silicon compounds: Inorganic silicon compounds and sol-gel systems-A review [J]. Wood Sci Technol, 2004, 37: 339-348. |
| [14] | 王西成, 史淑兰, 程之强, 等. (Si—, Al—)陶瓷化木材的化学方法 [J]. 材料研究学报, 2000, 14(1): 51-55. |
| [15] | 殷 馨, 戴媛静. 硅溶胶的性质、制法及应用 [J]. 化学推进剂与高分子材料, 2005, 3(6): 27-32. |
| [16] | 符韵林, 赵广杰, 全寿京. 二氧化硅/木材复合材料的微细构造与物理性能 [J].复合材料学报, 2006, 23(4): 52-59. |
| [17] | 林木森, 蒋剑春. 杨木屑热解过程及动力学研究 [J]. 太阳能学报, 2008, 29(9): 1135-1138. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%