| 肖文飞， 张新昌.挤出型生物质复合材料的制备工艺研究[J].轻工机械,2019,37(5):72-76 |
| 挤出型生物质复合材料的制备工艺研究 |
| Study on Preparation Technology of Continuous Extrusion of Biomass Materials |
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| DOI：10.3969/j.issn.1005 2895.2019.05.014 |
| 中文关键词: 生物质材料 连续挤出 挤出工艺 正交试验 |
| 英文关键词:biomass materials continuous extrusion extrusion process orthogonal test |
| 基金项目: |
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| 摘要点击次数: 891 |
| 全文下载次数: 1015 |
| 中文摘要: |
| 为了探究可行的生物质材料连续挤出加工方案，课题组通过正交试验获得最优工艺参数，并通过抗压强度、抗弯强度、抗弯弹性模量、干缩比和密度等性能指标对试样进行评价，分析其性能影响机理。结果显示：选用料筒温度70 ℃，机头温度70 ℃，螺杆转速40 r/min和牵伸长度40 mm时试样综合性能最佳，且机头温度为最大影响因素。料筒温度过高胶黏剂粘壁，试样不规整，过低浆料反应不全；机头温度过高易因水蒸发而断续，较低时纤维易过早冷却固化；螺杆转速提高会使剪切速率增加，物料的混炼效果变好，但减少了混料反应时间；牵伸长度由短至长，材料由易开裂至易堆积。该工艺试样可作为良好的代木材料应用于用于包装、家具及建材等领域的缓冲、非关键支撑和填充等场合。 |
| 英文摘要: |
| To explore the feasible continuous extrusion processing scheme for biomass materials, the optimal process parameters were obtained by orthogonal test. The samples were tested by compressive strength, flexural strength, flexural modulus, dry shrinkage ratio, density and other performance indicators to analyze the mechanism of performance influence. The results show that when the selected cylinder temperature is 70 ℃, the head temperature is 70 ℃, the screw speed is 40 r / min and the traction length is 40 mm, the overall performance of the sample is best, and the head temperature is the biggest influencing factor. The adhesive will stick to the wall and make the sample irregular when the barrel temperature is high, but the slurry is not fully reactive when the temperature is low. Materials will be intermittent due to evaporation of water when the machine head temperature is high, and fiber will be prematurely cooled and solidified when the machine head temperature is low. The shear rate will be increased with the increasing of the screw speed and the mixing effect of the material will be better, but the mixing reaction time will be reduced. The material is easily cracked to excessive accumulation when the elongation is from short to long. The process sample can be used as a good substitute for wood in packaging, furniture, building materials and other fields of buffering, non critical support, filling occasions. |
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