Sol-Gel法制备木材功能性改良用SiO2凝胶

doi:10.11707/j.1001-7488.20071218

林业科学 ›› 2007, Vol. 43 ›› Issue (12): 106-111.doi: 10.11707/j.1001-7488.20071218

Sol-Gel法制备木材功能性改良用SiO₂凝胶

李坚¹,邱坚^1,2,刘一星¹

1.东北林业大学生物质材料科学与技术教育部重点实验室,哈尔滨150040；2.西南林学院木质科学与装饰工程学院,昆明650224

收稿日期:2006-04-06 修回日期:1900-01-01 出版日期:2007-12-25 发布日期:2007-12-25

Sol-Gel Method Fabricate SiO₂ Aerogel Used in Function of Wood Modification

Li Jian¹ Qiu Jian^1,2 Liu Yixing¹

1 Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education,Northeast Forestry University Harbin 150040; 2. Faculty of Wood Science and Decoration Engineering,Southwest Forestry University Kunming 650224

Received:2006-04-06 Revised:1900-01-01 Online:2007-12-25 Published:2007-12-25

摘要/Abstract

摘要：

以正硅酸乙酯(TEOS)原料,HCl/HF混合酸为水解催化剂,研究应用于木材功能性改良的SiO₂凝胶的制备工艺条件。所配制3种反应溶液的TEOS/EtOH/H₂O比例分别为FU1=1.00∶15.35∶7.45,FU2=1.00∶5.43∶10.10,FU3=1.00∶5.47∶5.77,HCl/HF摩尔比分别为0.02/0.01、0.02/0.04和0.02/0.06,可在120min左右得到醇凝胶。将醇凝胶在-21℃条件下陈化1～3d后,在12h内自然升温至室温,24h内置于超临界流体中进行干燥单元操作,可以得到适合木材功能性改良用并具有纳米结构的SiO2气凝胶。

关键词: Sol-Gel法, SiO₂凝胶, 纳米结构, 木材-SiO₂气凝胶复合材, 木材功能性改良

Abstract:

Inorganic aerogels composites with wood can express virtue both of wood and nano inorganic aerogels. Wood-SiO₂ aerogel nanocomposites were fabricated by Sol-Gel method and super critical dry. Silica gels used in function of wood modification was researched in this paper. Using silica gels were fabricated with tetraethoxysilane (TEOS), ethanol (EtOH), water and HCl/HF acid by controlling Sol-Gel condition and component.Three kinds of solution the molar ratio of TEOS/EtOH/H₂O/HCl/HF is FU1=1.00∶15.35∶7.45∶0.02∶0.01,FU2=1.00∶5.43∶10.10∶0.02∶0.04,FU3=1.00∶5.47∶5.77∶0.02∶0.06,which the silica gels can be fabricated in 120 min. the silica gels were aging 1～3 d in-21 ℃ and then rised room temperature in 12 h.with of super critical dry the SiO₂ aerogel nanocomposites were fabricated which used in function of wood modification.

Key words: Sol-Gel method, silica gels, nanostructure, wood-SiO₂aerogel composites, function of wood modification

李坚;邱坚;刘一星. Sol-Gel法制备木材功能性改良用SiO₂凝胶[J]. 林业科学, 2007, 43(12): 106-111.

Li Jian Qiu Jian;Liu Yixing. Sol-Gel Method Fabricate SiO₂ Aerogel Used in Function of Wood Modification[J]. Scientia Silvae Sinicae, 2007, 43(12): 106-111.

[1]	邱坚. 李坚刘一星. 木材SiO₂醇凝胶复合材的超临界干燥工艺*[J]. 林业科学, 2008, 44(7): 62-67.
[2]	邱坚;李坚刘一星. SiO₂溶胶空细胞法浸渍处理木材工艺[J]. , 2008, 44(3): 124-128.
[3]	王爱华彭镇华孙启祥. 竹材生物矿化形成纳米结构二氧化硅的研究[J]. 林业科学, 2007, 43(06): 155-158.
[4]	李坚邱坚. 生物矿化原理与木材纳米结构复合材料[J]. 林业科学, 2005, 41(1): 189-193.

Sol-Gel法制备木材功能性改良用SiO₂凝胶

Sol-Gel Method Fabricate SiO₂ Aerogel Used in Function of Wood Modification

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