为研究硅溶胶浸渍处理对毛竹光老化性能的影响,探索利用硅溶胶改善竹材耐光老化性能的可行性,以毛竹为试验材料,采用傅里叶红外分析方法,对硅溶胶浸渍及光老化处理前后毛竹表面化学成分进行分析; 通过色差测试,研究硅溶胶浸渍处理前后毛竹加速光老化条件下的色彩稳定性; 结合扫描电镜及能谱分析,总结硅溶胶处理及光老化处理前后毛竹内部硅溶胶分布情况,并分析其对毛竹光老化性能的影响。研究结果显示:加速光老化后,毛竹在波数1 720、1 594、1 510、1 462及1 035 cm-1等处吸收峰产生变化,说明毛竹表面的半纤维素及木质素产生了光降解; 而在浸渍硅溶胶后,光老化毛竹化学成分对应位置的吸收峰变化减少,说明硅溶胶对毛竹耐光老化性能有改善效果。色差分析结果同样显示,硅溶胶浸渍处理后毛竹的色差减小,耐光老化性能得到改善。扫描电镜及能谱分析结果显示:硅溶胶浸渍处理后,硅溶胶填充于毛竹细胞腔内,对毛竹内部化学物质起保护作用; 而老化处理后,毛竹内部硅溶胶会产生一定程度的流失。浸渍处理后硅溶胶在毛竹内部主要以物理填充方式分布于细胞腔中,起到对其内部化学物质(纤维素、半纤维素及木质素等)的保护作用,使毛竹光老化后色差减小,耐光老化性能加强。因此,利用硅溶胶改善竹材耐光老化性能具有可行性。
Abstract
The present study investigated the impact of silica sol impregnation on photo-degradation property of moso bamboo(Phyllostachys edulis(Carr.)H. De Lehaie)and explored the possibility to enhance its aging resistance property. The color stability of the moso bamboo before and after accelerated light aging for both silica sol impregnated and control samples were tested. Chemical component changes were examined by the fourier transform infrared spectroscopy(FT-IR). Combined with the results of the scanning electron microscope(SEM)and energy dispersive analysis of X-rays(EDAX), the distribution of silica sol in the moso bamboo and the causes of photo-degradation property variation were explored. FT-IR results showed that absorption peaks at wave number of 1 720 cm-1, 1 594 cm-1, 1 510 cm-1, 1 462 cm-1, 1 035 cm-1, respectively, varied after the accelerate light aging, suggesting that the degradation of lignin or hemicellulose happened during the aging. However, after the silica sol impregnation, the absorption intensities at the corresponding wave numbers almost unchanged, indicating that the impregnation was effective in enhancing moso bamboo's aging resistance. Furthermore, chromatic aberration test results also showed that the light aging resistance and color stability were enhanced after the silica sol impregnation. SEM and EDAX test results showed that the silica sol can be filled in cell lumens of moso bamboo after impregnation, which protected the chemical substances from degradation, and eventually enhanced the light aging resistance of moso bamboo. The physical filling, instead of chemical bonding of silica sol in cell lumen of moso bamboo after impregnation, was effective to protect moso bamboo's chemical substances(cellulose, lignin and hemicellulose)from degradation, resulting in decreased chromatic aberration and modified light aging property. It is concluded that the silica sol is feasible to be used for improving moso bamboo's light aging property.
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参考文献
[1] Jiang Z H. Bamboo and rattan in the world[M]. Beijing: China Forestry Publishing House, 2007.
[2] 方桂珍, 刘一星, 崔永志, 等. 低分子量MF树脂固定杨木压缩木回弹技术的初步研究[J]. 木材工业, 1996, 10(4): 18-21.
Fang G Z, Liu Y X, Cui Y Z, et al. A preliminary study of the technique of fixating recovery from compressed poplar wood with MF resin[J]. China Wood Industry, 1996, 10(4): 18-21.
[3] 刘君良, 李坚, 刘一星. PF预聚物处理固定木材压缩变形的机理[J]. 东北林业大学学报,2000, 28(4): 16-20. Doi:10.3969/j.issn.1000-5382.2000.04.005.
Liu J L, Li J, Liu Y X. Study on the fixation mechanism of compressive deformation of wood by PF resin treatment[J]. Journal of Northeast Forestry University, 2000, 28(4): 16-20.
[4] 孙世彧, 段晓霞, 吴玉銮, 等. 仿瓷餐具材质与性能分析[J]. 中国塑料, 2011, 25(5): 101-104.
Sun S Y, Duan X X, Wu Y L, et al. Research on the materials and properties of melamine tablewares[J]. China Plastic, 2011, 25(5): 101-104.
[5] 田华, 陈连喜, 刘全文. 硅溶胶的性质、制备和应用[J]. 国外建材科技, 2007, 28(2): 8-11. Doi:10.3963/j.issn.1674-6066.2007.02.018.
Tian H, Chen L X, Liu Q W. Properties, manufactures and application of silica sol[J]. Science and Technology of Overseas Materials, 2007, 28(2):8-11.
[6] 林兰英. 硅溶胶强化杨木复合材的制备与性能研究[D]. 北京:中国林业科学研究院, 2008.
Lin L Y. Preparation and properties of poplar composite strengthened by silica sol[D]. Beijing:Chinese Academy of Forestry, 2008.
[7] Li J Z, Furuno T, Katoh S. Preparation and properties of acetylated and propionylated wood-silicate composite[J]. Holzforschung, 2001, 55(1): 93-96. Doi:10.1515/hfsg.2001.93.
[8] Miyafuji H, Saka S. Wood-inorganic composites prepared by the sol-gel process. V. Fire-resisting properties of the SiO2-P2O5-B2O3 wood-inorganic composites[J]. Mokuzai Gakkaishi, 1996, 42(1): 74-80. Doi:10.1007/bf00767902.
[9] 关鑫. 杨木和樟子松单板紫外光诱发变色的研究[D]. 哈尔滨:东北林业大学, 2009.
Guan X. Study on the induced discoloration of poplar and Mongolian Scotch pine veneer by UV light[D]. Harbin: Northeast Forestry University, 2009.
[10] 王小青,任海青,赵荣军,等. 毛竹材表面光化降解的FTIR和XPS 分析[J]. 光谱学与光谱分析,2009,29(7): 1864-1867. Doi:10.3964/j.issn.1000-0593(2009)07-1864-04.
Wang X Q, Ren H Q, Zhao R J, et al. FTIR and XPS spectroscopic studies of photodegradation of moso bamboo(Phyllostachys pubescens Mazel)[J]. Spectroscopy and Spectral Analysis, 2009, 29(7):1864-1867.
[11] Persze L, Tolvaj L. Photodegradation of wood at elevated temperature: colour change[J]. Journal of Photochemistry and Photobiology B: Biology, 2012, 108(6): 44-47. Doi:10.1016/j.jphotobiol.2011.12.008.
[12] ivkovic' V, Arnold M, Radmanovic' K, et al. Spectral sensitivity in the photodegradation of fir wood(Abies alba Mill.)surfaces: colour changes in natural weathering[J]. Wood Science and Technology, 2014, 48(2): 239-252.
[13] Wang X Q, Ren H Q. Surface deterioration of Moso bamboo(Phyllostachys pubescens)induced by exposure to artificial sunlight[J]. Journal of Wood Science, 2009, 55(1): 47-52. Doi:10.1007/s10086-008-0994-0.
[14] 秦莉, 于文吉. 木材光老化的研究进展[J]. 木材工业, 2009, 23(4): 33-36. Doi:10.3969/j.issn.1001-8654.2009.04.010.
Qin L, Yu W J. Review of research and development of photo-induced aging of wood[J]. China Wood Industry, 2009, 23(4): 33-36.
[15] 隋淑娟, 邱坚, 李坚. 木材-纳米SiO2气凝胶复合材料结构的FTIR表征[J]. 东北林业大学学报, 2006, 34(5):49-50. Doi:10.3969/j.issn.1000-5382.2006.05.019.
Sui S J, Qiu J, Li J. Characterization of chemical structure of wood-nano-SiO2 aerogel composites by FTIR[J]. Journal of Northeast Forestry University, 2006, 34(5):49-50.
[16] 姜亦飞, 储富祥, 秦特夫. 有机硅溶胶-凝胶法改性木材Si元素的分布状态[J]. 木材工业, 2013, 27(1): 21-23. Doi:10.3969/j.issn.1001-8654.2013.01.005.
Jiang Y F, Chu F X, Qin T F. Element distribution inside silicon modified wood[J]. China Wood Industry, 2013, 27(1): 21-23.
[17] Ogiso K,Saka S. Wood-inorganic composites prepared by sol-gel process. 4: effects of chemical bonds between wood and inorganic substances on property enhancement[J]. Mokuzai Gakkaishi, 1994, 40(10): 1100-1106. Doi: 10.1007/bf00767902.
基金
收稿日期:2015-03-18 修回日期:2015-10-15
基金项目:浙江省科技计划项目(2015F50054); 国家林业公益性行业科研专项项目(201404505)
第一作者:包永洁(scholar2@caf.ac.cn)。*通信作者:何盛(hesheng_cbrc@163.com),助理研究员,博士。
引文格式:包永洁,何盛,张泽前,等. 硅溶胶浸渍处理对毛竹光老化性能的影响[J]. 南京林业大学学报(自然科学版),2016,40(4):131-136.
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