响应面法优化稻草模塑材料热压工艺参数
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摘要
目的探讨热压过程中压力、温度和湿纸胚含水率等因素对稻草秸秆纤维模塑包装材料主要力学性能的影响,确定各因素的权重及最佳工艺参数。方法采用单因素试验法和响应曲面法,以裂断长和弯曲强度为评价指标,确定最佳工艺条件。结果最佳热压工艺条件,热压温度为175℃,热压压力为6.9 MPa,湿纸胚含水率为70%,此时得到的平均裂断长为7697.93 m,弯曲强度为72.36 MPa,与理论裂断长7712.62m、弯曲强度71.44MPa接近,优化结果可信。热压过程中各因素对模塑包装材料裂断长和弯曲强度影响的大小为湿纸胚含水率>热压压力>热压温度。结论过高的温度会造成半纤维素的热解,过高的压力会导致纤维的压溃,过高的含水率产生的能耗过高。适当的热压工艺参数能够降低能耗,保证模塑包装材料的品质及性能。
The work aims to investigate the effects of pressure, temperature and moisture content of wet paper embryos on the main mechanical properties of rice straw fiber molded packaging materials, and to determine the weights of each factor and the optimum process parameters. The single factor test method and response surface method were used to determine the optimum process conditions, with the breaking length and bending strength as the evaluation indicators. When the optimum hot-pressing conditions were: hot-pressing temperature of 175 ℃, hot-pressing pressure of 6.9 MPa and wet paper embryo moisture content of 70%, the average breaking length was 7697.93 m, and the bending strength was 72.36 MPa, both of which were close to the theoretical breaking length(7712.62 m) and the theoretical bending strength(71.44 MPa). As a result, the optimized result was credible. The influence of various factors on the breaking length and bending strength of molded packaging materials in the hot-pressing process was: wet paper embryo ture content> hot-pressing pressure> hot-pressing temperature. In conclusion, excessively high temperatures will cause pyrolysis of hemicellulose, excessively high pressure will cause crushing of the fibers, and excessively high ture content will lead to excessively high energy consumption. Proper hot-pressing process parameters can reduce energy consumption and ensure the quality and performance of molded packaging materials.
The work aims to investigate the effects of pressure, temperature and moisture content of wet paper embryos on the main mechanical properties of rice straw fiber molded packaging materials, and to determine the weights of each factor and the optimum process parameters. The single factor test method and response surface method were used to determine the optimum process conditions, with the breaking length and bending strength as the evaluation indicators. When the optimum hot-pressing conditions were: hot-pressing temperature of 175 ℃, hot-pressing pressure of 6.9 MPa and wet paper embryo moisture content of 70%, the average breaking length was 7697.93 m, and the bending strength was 72.36 MPa, both of which were close to the theoretical breaking length(7712.62 m) and the theoretical bending strength(71.44 MPa). As a result, the optimized result was credible. The influence of various factors on the breaking length and bending strength of molded packaging materials in the hot-pressing process was: wet paper embryo ture content> hot-pressing pressure> hot-pressing temperature. In conclusion, excessively high temperatures will cause pyrolysis of hemicellulose, excessively high pressure will cause crushing of the fibers, and excessively high ture content will lead to excessively high energy consumption. Proper hot-pressing process parameters can reduce energy consumption and ensure the quality and performance of molded packaging materials.
引文
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[17]王全亮,岳金权,肖生苓,等.热压初始水分对重载纤维模塑材料性能的影响[J].高校化学工程学报,2017,31(4):951-959.WANG Quan-liang,YUE Jin-quan,XIAO Sheng-ling,et al.Effect of Hot Pressing Initial Moisture on Properties of Heavy Duty Fiber molded materialss[J].Journal of Chemical Engineering of Chinese Universities,2017,31(4):951-959.
[18]王俊,申立中,杨永忠,等.基于响应曲面法的非道路用高压共轨柴油机设计点优化标定[J].农业工程学报,2017,33(3):31-39.WANG Jun,SHEN Li-zhong,YNAG Yong-zhong,et al.Non-Road High-Pressure Common-Rail Diesel Engine Design Optimization Calibration Based on Response Surface Methodology[J].Transactions of the Chinese Society of Agricultural Engineering,2017,33(3):31-39.
[19]何为,唐斌,薛卫东.优化实验设计方法与分析[M].北京:化学工业出版社,2012.HE Wei,TANG Bin,XUE Wei-dong,et al.Optimization Experimental Design Method and Analysis[M].Beijing:Chemical Industry Press,2012.
[20]张佳宁,郭仁全,曹潇文,等.处理麦秸制备麦草刨花板性能研究[J].森林工程,2016,32(5):44-47.ZHANG Jia-ning,GUO Ren-quan,CAO Xiao-wen,et al.Study on the Properties of Wheat Straw Particle Board Prepared by Treating Wheat Straw[J].Forest Engineering,2016,32(5):44-47.
[21]RAUNIJA T S K,SHARMA S C.Influence of Hot-Pressing Pressure on the Densification of Short-Carbon-Fiber-Reinforced,Randomly Oriented Carbon/Carbon Composite[J].Carbon Letters,2015,16(1):25-33.
[2]肖青,万金泉.桉木浆回用过程中纤维物理化学性能的变化[J].造纸科学与技术,2008,27(6):59-63.XIAO Qing,WAN Jin-quan.Change of Fiber Physical and Chemical Properties During Recycling Process of Wood Pulp[J].Pulp Science and Technology,2008,27(6):59-63.
[3]李奇明,蒋绮雯,戚军军,等.不同预处理对二次纤维组分及结构的影响[J].中华纸业,2017,38(14):11-15.LI Qi-ming,JIANG Qi-wen,QI Jun-jun,et al.Effects of Different Pretreatments on Secondary Fiber Componentsand Structures[J].China Paper Industry,2017,38(14):11-15.
[4]廖泽顺,滑广军,莫灿梁,等.纸浆模塑吸滤成型模具的吸浆孔结构优化[J].包装学报,2016,8(3):32-37.LIAO Ze-shun,HUA Guang-jun,MO Can-liang,et al.Optimization of Suction Hole Structure for Pulp Molding Suction Filtration Mold[J].Packaging Journal,2016,8(3):32-37.
[5]汪欣,张新昌.造纸助剂用于纸浆模塑制品表观性能的改善[J].江南大学学报(自然科学版),2015,14(4):449-453.WANG-Xin,ZHANG Xin-chang.Paper-Making Aids for Improving the Apparent Properties of Pulp Molded Articles[J].Journal of Jiangnan University(Natural Science),2015,14(4):449-453.
[6]ESPINOSA E,TARRéS Q,DOMíNGUEZ-ROBLES J,et al.Recycled Fibers for Fluting Production:The Role of Lignocellulosic Micro/Nanofibers of Banana Leaves[J].Journal of Cleaner Production,2018,172(1):233-238.
[7]刘刚,李亚欢,郭荣,等.响应面法优化锁阳熊果酸提取工艺[J].吉林农业大学学报,2014,36(6):723-729.LIU Gang,LI Ya-huan,GUO Rong,et al.Optimization of the Extraction Process of Cynomorium Ursolic Acid by Response Surface Methodology[J].Journal of Jilin Agricultural University,2014,36(6):723-729.
[8]AlYAMAC K E,GHAFARI E,INCE R.Development of Eco-Efficient Self-Compacting Concrete with Waste Marble Powder Using the Response Surface Method[J].Journal of Cleaner Production,2016,144:192-202.
[9]解光强,陈啟原,林文树.基于响应曲面法的木塑复合3D打印线材挤出参数优化[J].塑料科技,2018,46(4):103-108.XIE Guang-qiang,CHEN Qi-yuan,LIN Wen-shu.Optimization of Extrusion Parameters of Wood-Plastic Composite 3D Printing Wire Based on Response Surface Methodology[J].Plastics Science and Technology,2018,46(4):103-108.
[10]修慧娟,李金宝,杨国鑫,等.响应面法优化纳米纤维纸基材料热压工艺的研究[J].陕西科技大学学报(自然科学版),2016,34(4):11-15.XIU Hui-juan,LI Jin-bao,YANG Guo-xin,et al.Optimization of Hot Pressing Process for Nanofiber Paper-Based Materials by Response Surface Methodology[J].Journal of Shaanxi University of Science and Technology(Natural Science Edition),2016,34(4):11-15.
[11]LEVINGSTONE T J,BARRON N,ARDHAOUI M,et al.Application of Response Surface Methodology in the Design of Functionally Graded Plasma Sprayed Hydroxyapatite Coatings[J].Surface&Coatings Technology,2017,313:307-318.
[12]WONG Y C,TAN Y P,TAUFIQYAP Y H,et al.An Optimization Study for Transesterification of Palm Oil Using Response Surface Methodology(RSM)[J].Sains Malaysiana,2015,44(2):281-290.
[13]左迎峰,吴义强,肖俊华,等.基于响应曲面优化法的重组竹热压工艺[J].功能材料,2016,47(11):11196-11200.ZUO Ying-feng,WU Yi-qiang,XIAO Jun-hua,et al.Recombinant Bamboo Hot Pressing Process Based on Response Surface Optimization Method[J].Journal of Functional Materials,2016,47(11):11196-11200.
[14]杨波,卢晶昌,杨光,等.响应面法优化豆胶强化地板平衡纸压贴工艺[J].包装工程,2016,37(13):65-70.YANG Bo,LU Jing-chang,YANG Guang,et al.Response Surface Method to Optimize the Binding Process of Soy Glue Strengthened Floor Paper[J].Packaging Engineering,2016,37(13):65-70.
[15]张哲源,李博,严欢,等.改性大豆蛋白用于轻质代木包装材料的制备[J].包装工程,2016,37(15):72-77.ZHANG Zhe-yuan,LI Bo,YAN Huan,et al.Modified Soybean Proteins for the Preparation of Lightweight Wood Packaging Materials[J].Packaging Engineering,2016,37(15):72-77.
[16]李琛.木质剩余物纤维多孔型材料制备及缓冲特性研究[D].哈尔滨:东北林业大学,2013.LI Chen.Study on Preparation and Cushioning Properties of Porous Fiber Material with Wood Residue[D].Harbin:Northeast Forestry University,2013.
[17]王全亮,岳金权,肖生苓,等.热压初始水分对重载纤维模塑材料性能的影响[J].高校化学工程学报,2017,31(4):951-959.WANG Quan-liang,YUE Jin-quan,XIAO Sheng-ling,et al.Effect of Hot Pressing Initial Moisture on Properties of Heavy Duty Fiber molded materialss[J].Journal of Chemical Engineering of Chinese Universities,2017,31(4):951-959.
[18]王俊,申立中,杨永忠,等.基于响应曲面法的非道路用高压共轨柴油机设计点优化标定[J].农业工程学报,2017,33(3):31-39.WANG Jun,SHEN Li-zhong,YNAG Yong-zhong,et al.Non-Road High-Pressure Common-Rail Diesel Engine Design Optimization Calibration Based on Response Surface Methodology[J].Transactions of the Chinese Society of Agricultural Engineering,2017,33(3):31-39.
[19]何为,唐斌,薛卫东.优化实验设计方法与分析[M].北京:化学工业出版社,2012.HE Wei,TANG Bin,XUE Wei-dong,et al.Optimization Experimental Design Method and Analysis[M].Beijing:Chemical Industry Press,2012.
[20]张佳宁,郭仁全,曹潇文,等.处理麦秸制备麦草刨花板性能研究[J].森林工程,2016,32(5):44-47.ZHANG Jia-ning,GUO Ren-quan,CAO Xiao-wen,et al.Study on the Properties of Wheat Straw Particle Board Prepared by Treating Wheat Straw[J].Forest Engineering,2016,32(5):44-47.
[21]RAUNIJA T S K,SHARMA S C.Influence of Hot-Pressing Pressure on the Densification of Short-Carbon-Fiber-Reinforced,Randomly Oriented Carbon/Carbon Composite[J].Carbon Letters,2015,16(1):25-33.