预处理对回收包装纸颗粒分散性的影响
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摘要
研究了氢氧化钠(NaOH)、硅酸钠(Na_2SiO_3)、碳酸钠(Na_2CO_3)三种试剂预处理后的回收包装纸颗粒粒径分布以及不同预处理条件对纸粉出粉率、形态的影响,得出了较优的处理工艺,以解决其作为填料制备高密度聚乙烯(HDPE)基纸塑复合材料时由于结团堵塞挤出机、架桥等问题。分析了氢氧化钠预处理回收包装纸纤维的分散特性,结果表明,这三种试剂中NaOH预处理效果最好,在NaOH浓度为3.5%,浴比为1∶12,常温处理40min的条件下,可获得分散性良好,出粉率较高的纸粉。
Particle size distribution of recycled packaging paper after pretreatment with sodium hydroxide(NaOH),sodium silicate(Na_2SiO_3)and sodium carbonate(Na_2CO_3)was studied,and the effects of pretreatment conditions on the paper powder yield and particle morphology was also investigated.Based on the investigation,a better processing technology was obtianed,and some problems such as clog extruder due to knotting and particle bridging were overcome when it was used as a filler to produce HDPE-based paper-plastic composite materials.Dispersion properties of the recycled packaging paper fibers were analyzed by using conventional methods.Results showed that the pretreatment effect of NaOH was the best among those three reagents,high dispersibility and a high yield of paper powder can be obtained under the condition of NaOH concentration 3.5%,bath ratio 1∶12 and impregnated at room temperature for 40 min.
Particle size distribution of recycled packaging paper after pretreatment with sodium hydroxide(NaOH),sodium silicate(Na_2SiO_3)and sodium carbonate(Na_2CO_3)was studied,and the effects of pretreatment conditions on the paper powder yield and particle morphology was also investigated.Based on the investigation,a better processing technology was obtianed,and some problems such as clog extruder due to knotting and particle bridging were overcome when it was used as a filler to produce HDPE-based paper-plastic composite materials.Dispersion properties of the recycled packaging paper fibers were analyzed by using conventional methods.Results showed that the pretreatment effect of NaOH was the best among those three reagents,high dispersibility and a high yield of paper powder can be obtained under the condition of NaOH concentration 3.5%,bath ratio 1∶12 and impregnated at room temperature for 40 min.
引文
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[4]Figen A K,Terzi E,Yilg9r N.Thermal Degradation Characteristic of Tetra Pak Panel Boards under Inert Atmosphere[J].Korean Journal of Chemical Engineering,2013,30(4):878~890.
[5]Yilgo N,Kartal S N,Houtman C,et al.Composite Boards Produced from Waste Tetra Pak Packaging Materials:Chemical Properties and Biological Performance[C].International Conference on Recycling and Reuse,Istanbul,4-6June 2012.
[6]Rhamin H,Madhoushi M,Ebrahimi A,et al.Effect of Resin Content,Press time and Overlaying on Physical and Mechanical Properties of Carton Board made from Recycled Beverage Carton and MUF Resin[J].Life Science Journal,2013,10(4):613-619.
[7]Ayrilmis N,Candan Z,Hiziroglu S.Physical and Mechanical Properties of Cardboard Panels Made from Used Beverage Carton with Veneer Overlay[J].Materials and Design,2008,29(10):1897~1903.
[8]Hashem R,Mehrab M,et al.Effect of Resin Content,Press Time and Overlaying on Physical and Mechanical Properties of Carton Board Made from Recycled Beverage Carton and MUFResin[J].Life Science Journal,2013,10(4s):613~619.
[9]Parichatprecha R,Paoleng P,et al.Mechanical Properties of Cement-bonded Composite Board Produced from Aseptic Carton Waste[C].Third International Conference on Sustainable Construction Materials and Tchnologies,Kyoto,2013.
[10]Avella M,Avolio R,Bonadies I,et al.Recycled Multilayer Cartons as Cellulose Source in HDPE-based Composites:Compatibilization and Structure-properties Relationships[J].Journal of Applied Polymer Science,2009,114(5):2978~2985.
[11]Gassan J,Bledzki A K.Possibilities for Improving the Mechanical Properties of Jute/Epoxy Composites by Alkali Treatment of Fibres[J].Composites Science and Technology,1999,59(9):1303~1309.
[12]Cantero G,Arbelaiz A,Mugika F,et al.Mechanical Behavior of Wood/Polypropylene Composites:Effects of Fibre Treatments and Ageing Processes[J].Journal of Reinforced Plastics and Composites,2003,22(1):37~50.
[13]Qin Z,Wu Y,Li X,et al.Effects of Fiber Mass Fraction and Alkali Concentration on Mechanical Properties of Biodegradable Composites[J].Advanced Materials Research,2011,152(10):1677~1682.
[14]周箭,张启龙,杨辉,等.抗紫外PVDF基木塑复合材料的热分析[J].材料科学与工程学报,2009,27(6):845~849.
[15]周亚巍,宁莉萍,等.木粉的酯化处理对木塑复合材料性能的影响[J].材料科学与工程学报,2014,32(4):572~576;612.
[16]吕秉峰,邵自强,严利芳.纤维素高压蒸气闪爆改性前后结构表征研究[J].华北工学院学报,2002,23(4):253~256.
[17]鲁杰,石淑兰,邢效功,等.NaOH预处理对植物纤维素酶解特性的影响[J].纤维素科学与技术,2004,12(1):1~6.
[18]Sun J X,Sun X F,Zhao H,et al.Isolation and Characterization of Cellulose from Sugarcane Bagasse[J].Polymer Degradation and Stability,2004,84:331~339.
[19]何艳峰,李秀金,方文杰,等.NaOH固态预处理对稻草中纤维素结构特性的影响[J].可再生能源,2007,25(5):31~34.