纳米TiO_2改性ACQ防腐处理材性能研究  

Performance of nano-TiO_2 modified ACQ preservative treated wood

作　　者：于丽丽[1] 蔡杰[1] 唐镇忠[2] 朱俊艳[1] 朱礼智[1] 马晓军[1] YU Lili1,CAI Jie1, TANG Zhenzhong2 ,ZHU Junyan1 ,ZHU Lizhi1, MA Xiaojun1(1 Department of Packaging and Printing Engineering, Tianjin University of Science and Technology, Tianjin 300222, China 2 Timber Value Promotion and Substitution Administration Center,Beijing 100834,Chin)

机构地区：[1]天津科技大学包装与印刷工程学院,天津300222 [2]木材节约发展中心,北京100834

出　　处：《西北农林科技大学学报（自然科学版）》2018年第2期15-21,共7页Journal of Northwest A&F University(Natural Science Edition)

基　　金：国家自然科学基金青年科学基金项目(31400499);国家大学生创新创业训练计划项目(201610057018);天津科技大学大学生实验室创新基金项目(1606A213)

摘　　要：【目的】以抗老化能力强、具有广谱杀菌性的纳米TiO_2改性胺溶季铵铜(ACQ)木材防腐剂,以期提高ACQ防腐处理材的综合性能。【方法】以分散效率为评价指标,采用正交试验方法考察纳米TiO_2在ACQ溶液中的最佳分散条件,并对纳米TiO_2改性ACQ处理材的顺纹抗压强度、横纹抗压强度及抗水流失性的变化进行了分析。另外,通过红外光谱分析,阐明纳米TiO_2改性ACQ处理材中官能团的变化。【结果】纳米TiO_2在ACQ防腐溶液中稳定性较好的分散工艺条件为:ACQ质量分数为0.6%,纳米TiO_2质量为0.05g,纳米TiO_2与Na_6O_(18)P_6质量比为1∶5,超声温度40℃,超声时间60min;各影响因素作用顺序依次为:纳米TiO_2质量>纳米TiO_2与Na_6O_(18)P_6质量比>ACQ质量分数>超声温度>超声时间。添加纳米TiO_2的ACQ处理材,其横纹抗压强度及顺纹抗压强度分别为5.98和48.4 MPa,均高于ACQ处理材,并且具有更低的铜流失率。从FTIR谱图可见,添加纳米TiO_2的ACQ处理材,主要是与半纤维素、木质素发生反应,生成以Ti-O-C为主要产物的化合物,并且ACQ质量分数在0.6%~0.8%时,添加纳米TiO_2改性的ACQ溶液稳定性更好。【结论】成功探索出抗流失性较好、力学性能较高的纳米TiO_2改性胺溶季铵铜(ACQ)处理材制备工艺。【Objective】Alkaline copper quat（ACQ）preservative was modified by nano-TiO_2 with excellent aging resistance and broad spectrum bactericidal ability to improve the comprehensive properties of the treated wood.【Method】The dispersion efficiency was used as evaluation index to investigate the ideal dispersion conditions of nano-TiO_2 dispersion into ACQ solution by the orthogonal test.The copper leaching performance and the compression strengths parallel to grain and perpendicular to grain of ACQ treated wood with different treatments were investigated,and the changes of the chemical structure of the treated wood were analyzed by FTIR spectrum analysis.【Result】The ideal modification conditions for nano-TiO_2 dispersed into ACQ solution were 0.6% of ACQ mass fraction,0.05 g of nano-TiO_2 mass,1：5 of the ratio between nano-SiO_2 and sodium hexametaphosphate,40 ℃ of ultrasonic temperature,and 60 min of ultrasonic time.The factors were in the decreasing order of mass of nano-SiO_2 ratio between nano-SiO_2 and sodium hexametaphosphateACQ mass fraction ultrasonic temperatureultrasonic time.Compared to the ACQ treated wood,nano-TiO_2 modification was critical for improving the compression strengths paral-lel to grain and perpendicular to grain of ACQ treated wood,and the copper leaching resistance.The compression strengths parallel to grain and perpendicular to grain were increased to 5.98 and 48.4 MPa,respectively.The chemical reactions between nano-TiO_2 and wood constituents were hemicellulose and lignin,and the ideal dispersion mass fraction for ACQ preservative was between 0.6%-0.8% observed by FTIR spectrum.【Conclusion】Nano-TiO_2 modified ACQ treated wood were successfully prepared.

关 键 词：ACQ处理材 纳米TiO_2 分散性 流失性 力学性能 

分 类 号：S782.33[农业科学—木材科学与技术]