In-situ synthesis and anti-mold property of nano-copper of the heat-treated wood
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摘要:目的
提高热处理木材的防霉变性能，为扩大高温热处理木材的使用范围提供技术支撑。
方法依据液相还原反应原理，以含铜浸渍液加压处理马尾松Pinus massoniana木材，运用木材热处理技术，获得热处理木材，依据改良的霉变箱法测试该材料的防霉变效力。
结果对照组马尾松经高温220 ℃、3 h以上热处理之后，木材的防霉效力为20%以下；同等条件下，含铜马尾松热处理材防霉效力达90%以上。扫描电镜(SEM)与能谱(EDS)、X射线光电子能谱(XPS)和X射线衍射(XRD)表征含铜马尾松热处理木材内生成了纳米铜。
结论含铜热处理木材受热原位生成的100 nm铜能够极大地提高木材的防霉变效力。
Abstract:ObjectiveTo improve the anti-mold property of heat-treated wood and provide a technical support for expanding the use range of heat-treated wood.
MethodThe Pinus massoniana wood was dipped in copper impregnated liquid with pressure according to liquid reduction reaction principle. The heat-treated wood was obtained by heat treatment technics, and anti-mold property of the wood was tested by modified mold culture box test method.
ResultThe control group of P. massoniana wood was treated more than 3 hours at 220 ℃ and the mold-resistance effectiveness was lower than 20%. Under the same heat treatment condition, the mold-resistance effectiveness of P. massoniana wood which was impregnated in copper solution was more than 90%. The data of scanning electron microscope (SEM), energy disperse spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) showed that nano-copper was generated in copper-contained P. massoniana heat-treated wood.
ConclusionThe 100 nm copper produced in situ by heat treatment of copper-contained wood can greatly improve anti-mold property of wood.
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Keywords:
- wood /
- heat treatment /
- anti-mold /
- nano-copper /
- copper-contained compound
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图 2 含铜马尾松热处理材的扫描电镜(SEM)与能谱(EDS)分析
a为CuG2203的SEM，b为CuG2205的SEM，c为CuG2207的SEM，图中箭头所指为附着在木材上的铜颗粒；d为CuG2203的EDS，e为CuG2205的EDS，f为CuG2207的EDS
Figure 2. Scanning electron microscope (SEM) and energy disperse spectroscopy (EDS) analyses of copper-contained Pinus massoniana heat-treated wood
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图 3 含铜马尾松热处理材的X射线光电子能谱(XPS)
Figure 3. X-ray photoelectron spectroscopy test of copper-contained Pinus massoniana heat-treated wood
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图 4 含铜热处理材的X射线衍射(XRD)测试
Figure 4. X-ray diffraction test of copper-contained Pinus massoniana heat-treated wood
表 1 不同处理方式的马尾松材的防霉变效力
Table 1 Mold-resistance effectiveness of Pinus massoniana wood processed in different methods
样品
编号1)处理方式 平均霉
变等级防霉效
力/%CuG浸渍2) θ热处理/℃ t/h CK – 4.00 0 N-3 – 220 3 3.75 6.25 N-5 – 220 5 3.33 16.75 N-7 – 220 7 3.67 8.25 CuG2203 + 220 3 0.25 93.75 CuG2205 + 220 5 0.08 97.92 CuG2207 + 220 7 0.33 91.67 1) CK为对照材，N为经热处理的对照材，CuG为经热处理的浸渍材；2) +表示经过CuG浸渍处理，–表示未处理 
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