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摘要: 在质量浓度为36%（360 gL－1）的硫酸催化作用下用苯酚对桉树Eucalyptus spp. 树皮进行液化，考察催化剂用量、液固比、液化温度和液化时间对液化反应效率的影响；通过正交实验得到桉树树皮液化的较佳方案，并对桉树树皮液化物树脂化的影响因素进行研究。结果表明：①液固比对桉树树皮液化效果的影响最大，其次依次为液化温度、液化时间。②通过单因素分析法和正交试验法相结合，得出桉树树皮较理想的液化工艺条件：液固比为10:3，液化温度为150 ℃，液化时间为80 min，质量浓度36%硫酸用量为液化物总量的6%。③以树皮液化物为基准，选择甲醛摩尔比为1.6，氢氧化钠摩尔比为0.3，水摩尔比为8.0，缩聚温度95 ℃的树脂化工艺制备树脂胶黏剂用于压板。样板经过广西壮族自治区产品质量监督检验院的检测：产品的含水率为10%，在技术要求范围内；胶合强度的平均值为0.835 8 MPa，在Ⅰ类胶合板的技术要求内；甲醛释放量为1.5 mgL－1，属于E2级别。图1表2参13Abstract: To determine optimum catalyst concentration，phenol-Eucalyptus bark ratio，liquefaction temperature，and liquefaction time on bark liquefaction，as well as factors influencing resinification；phenol in the presence of 36% （360 gL-1） sulfuric acid was used to liquefy Eucalyptus bark and analyzed using an orthogonal design with a single factor analysis. Results showed that （1） effects on Eucalyptus bark liquefaction，from greatest to least，were：liquid ratio liquefaction temperature liquefaction time. （2） The orthogonal experiment revealed optimum liquefaction processing parameters of：phenol-Eucalyptus bark ratio of 10 ∶ 3，reactive temperature of 150℃ ，reactive time of 80 min，and a 36%（360 gL-1） sulfuric acid content of 6% for the total liquefaction. （3） To prepare resin and press plywood panels using liquefied bark as a standard，the following was selected：formaldehyde molar ratio of 1.6，NaOH molar ratio of 0.3，water molar ratio of 8.0，and a reaction temperature of 95℃. Thus，Guangxi Zhuang Autonomous Region Product Quality Supervision and Inspection Centre detected a product moisture content of 10% which was within technical requirements，an average bonding strength of 0.835 8 MPa which met the technical requirements of Type l Plywood，and formaldehyde emission of 1.5 mgL-1 which qualified for classification at E2 levels. ［Ch，1 fig. 2 tab. 13 ref.]
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https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2011.03.019
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