借助实验设计软件Design-Expert(Ⅴ.7.0)探讨了处理时间、处理温度和药剂浓度3个变量对慈竹乙酰化工艺及尺寸稳定性的影响进行了正交实验研究.结果表明:乙酰化慈竹的吸水厚度膨胀率和吸水率均随乙酰化增重率(WPG)的增加而下降;处理时间和处理浓度对慈竹乙酰化处理有显著影响,处理温度对慈竹乙酰化有极显著影响;处理后O-H的伸缩振动强度随着乙酰化增重率的升高而明显降低,C=O和-CH3伸缩振动强度均随着慈竹乙酰化增重率的升高而显著增强;实验因素水平范围内,较佳的慈竹乙酰化工艺为反应时间50 min,药剂浓度为8%,反应温度130 ℃.%The effects of processing time, processing temperature and agent concentration on the acetylating process and dimensional stability of Neosinocalamus affinis were explored by using the experimental design software Design-Expert (Ⅴ.7.0).The thickness swelling rate and water absorption rate of acetylated Neosinocalamus affinis slivers decreased with the increase of WPG.The time and concentration had significant effects on bamboo acetylating, and the treatment temperature had highly significant effect on acetylating reaction.The hydrophilic hydroxyl functional group (-OH) of acetylated Neosinocalamus affinis decreased, and hydrophobic ester functional groups (C=O,-CH3) increased substantially.In the range of experiment factors and levels, the optimum technological conditions of acetylated Neosinocalamus affinis were reaction time of 50 min, reaction concentration of 8%, the reaction temperature of 130 ℃.
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