水载铜基防腐剂处理对竹条表面润湿性的影响

摘要

The contact angles of three different probe liquids ( distilled water, diiodomethane and formamide) formed on the surfaces of bamboo strip treated with ACQ and CuAz, which were waterborne copper based preservatives, were measured.Based on the contact angle, the surface free energy( SFE) of bamboo treated with the preservatives was calculated with geometric mean model to explore the effect of the preservatives on the bamboo surface wettability.Results showed that SFE of the inner surface was slightly higher than that of the outer surface in bamboo, but the difference was not significant at 0.05 level.SFE of bamboo treated with ACQ was significantly higher than that treated with CuAz.Compared with the untreated bamboo, SFE of treated bamboo slightly increased, which presented a curve upward followed by downward along with the added amount of preservatives.When retention of ACQ was more than 5.2 kg· m-3 or CuAz was more than 2.2 kg· m-3 , the difference of SFE between treated and untreated bamboo was not significant.%以水载铜基防腐剂季铵铜（ACQ ）和铜唑（ CuAz）处理毛竹竹条，采用蒸馏水、二碘甲烷、甲酰胺3种参照液体，测定其在防腐处理竹材表面的接触角，并利用几何平均法计算处理材的表面自由能，探讨防腐处理对竹材表面润湿性的影响。结果表明，竹黄面的表面自由能略高于竹青面，但二者差异不显著（ p＞0．05）；ACQ与CuAz处理材的表面自由能差异显著， ACQ处理材的表面自由能高于CuAz处理材；与未处理材相比，经过防腐剂处理的竹材，大多数表面自由能有所增加，但是随着载药量升高呈现先上升后下降的趋势；当ACQ载药量达到5．2 kg· m－3，CuAz达到2．2 kg· m－3，防腐处理材与对照样的表面自由能差异不显著。