【摘要】 为提高胶合板的使用寿命,对其进行防腐处理。用乙二醛/丙三醇与硼砂复配物为防腐剂,采用浸渍法对杨木单板进行防腐处理,以酚醛胶为胶黏剂,压制防腐胶合板,采用响应面法分析与优化防腐胶合板的制作工艺。结果表明,制作杨木防腐胶合板,用质量分数6%的硼砂、质量分数1%的丙三醇与乙二醛复配作防腐剂,最佳工艺条件为:防腐液中乙二醛的质量分数为3.00%,干燥温度70℃,干燥时间5 h;胶合强度预测值1.43 MPa,硼保持率预测值50.63%;按优化的工艺制作杨木防腐胶合板,重复试验测得平均胶合强度实测值1.46 MPa,平均硼保持率实测值49.38%,与模型预测值相近;对最佳工艺条件制作的杨木防腐胶合板进行室内耐腐试验,质量损失率为2.98%<10%,达到强耐腐等级,说明所选取的防腐剂与制作工艺切实可行。图6表5参13更多还原

【Abstract】 To enhance the service life of plywood with preservative treatments, blends of borax, glyoxal, and glycerol were employed. Response surface methodology(RSM) was used to optimize preparation techniques for preserved plywood produced from poplar which had undergone soaking with preservative solution pretreatments bonded with phenol formaldehyde resin. To verify the predicted optimum point, six pieces of plywood were prepared using optimum manufacturing techniques. Results showed that the preservative solution should contain 6% borax(wt.), 1% glycerol(wt.), and some glyoxal. The optimum manufacturing techniques were as follows: 3.0% weight content of glyoxal in the preservative, 70 ℃ drying temperature, and 5 h drying time. Resultant bonding strength of the response variables was 1.43 MPa, and the retention rate of boron was 50.63%. To verify the predicted optimum point, optimum manufacturing techniques of 1.46 MPa average bonding strength and 49.38% retention rate were used on 6 pieces of plywood resulting in no significant difference(P = 0.01) from the predicted response variables. The test for interior antiseptic properties of preserved plywood prepared from the optimum manufacturing techniques showed a weight loss of 2.98%. Thus, the low weight loss met the high-level, antisepticised requirement for weight loss of less than 10%; thereby revealing the feasibility of these preservatives and manufacturing techniques for preserving plywood. The regression model for the manufacturing techniques of preserved poplar plywood was satisfactory and accurate and could be used to navigate the experimental design space. [Ch, 6 fig. 5 tab. 13 ref.]更多还原