Response surface methodology based on the central composite design was used to investigate modeling and optimizing the individual and interactive effects of independent process variables (temperature, pulping time, ethanol concentration and alkali concentration) on the yield, kappa number and brightness of the pulp produced from the bamboo species Yushania alpina. Based on the central composite design, quadratic models and two-factor interactions were developed and correlated the pulp yield, kappa number and brightness of the pulps. The most significant parameters that affect the pulp yield, kappa number and brightness of the pulp were found to be temperature, ethanol concentration and alkali concentration, respectively. The optimum process variables were found at a cooking temperature of 162.30 °C, cooking time of 180 min, ethanol concentration of 60% and alkali concentration of 18.03% producing maximum pulp yield of 53.56% and brightness of 63.85%, and minimum kappa number of 11.65, and desirability of 0.882. In addition, the chemical analysis of Y. alpina chips was compared with different bamboo species. The predicted optimum conditions provided tensile index, burst index and tear index of 48.25 kN m/kg, 2.95 kPa m2 and 2.80 N m2/kg, respectively, and were experimentally confirmed. In general, the findings of the study show that pulp produced from the bamboo species Y. alpina is a suitable raw material for the paper and pulp industry.

中文翻译：

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响应面法优化竹(Yushania alpina)乙醇-​​碱制浆工艺建模

使用基于中心复合设计的响应面方法来研究独立工艺变量（温度、制浆时间、乙醇浓度和碱浓度）对纸浆产量、卡伯值和亮度的单独和交互影响的建模和优化。竹种 Yushania alpina。基于中心复合设计，开发了二次模型和双因素相互作用，并将纸浆产量、卡伯值和纸浆亮度相关联。发现影响纸浆产量、卡伯值和纸浆亮度的最重要参数分别是温度、乙醇浓度和碱浓度。最佳工艺变量是在 162.30 °C 的蒸煮温度、180 分钟的蒸煮时间、乙醇浓度为 60%，碱浓度为 18.03%，制浆率最大为 53.56%，白度为 63.85%，最小卡伯值为 11.65，合意度为 0.882。此外，还比较了高山杨木屑与不同竹种的化学分析。预测的最佳条件分别提供了 48.25 kN m/kg、2.95 kPa m2 和 2.80 N m2/kg 的拉伸指数、爆破指数和撕裂指数，并得到了实验证实。总的来说，研究结果表明，从竹种 Y. alpina 生产的纸浆是造纸和纸浆工业的合适原材料。alpina 芯片与不同的竹种进行了比较。预测的最佳条件分别提供了 48.25 kN m/kg、2.95 kPa m2 和 2.80 N m2/kg 的拉伸指数、爆破指数和撕裂指数，并得到了实验证实。总的来说，研究结果表明，从竹种 Y. alpina 生产的纸浆是造纸和纸浆工业的合适原材料。alpina 芯片与不同的竹种进行了比较。预测的最佳条件分别提供了 48.25 kN m/kg、2.95 kPa m2 和 2.80 N m2/kg 的拉伸指数、爆破指数和撕裂指数，并得到了实验证实。总的来说，研究结果表明，从竹种 Y. alpina 生产的纸浆是造纸和纸浆工业的合适原材料。