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首页> 外文期刊>Journal of Materials Science and Chemical Engineering >Study on Water Resistance of Polydopamine Treatment Wood Flour/Polypropylene Composites
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Study on Water Resistance of Polydopamine Treatment Wood Flour/Polypropylene Composites

机译：聚多巴胺处理木粉/聚丙烯复合材料的耐水性研究

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This paper aims to investigate the water absorption of wood flour/polypropylene composites and its effects on dimensional stability and crystallization properties. Wood-plastic composites (WPCs) makes using polydopamine modified wood flour (WF-D), virgin polypropylene, maleic anhydride-grafted polypropylene (MA) and antioxidant, by using hot-pressing moulding. Water absorption (WA), thickness swelling (TS) and failure of flexural properties of the composites have studied for a range of immersion times. It is found that the WA and TS have increased with WF content and immersion time. The water absorption and thickness swelling of WPCs are 0.85% and 0.99%, respectively, after 8 days immersion. With the prolonging of immersion time, the impact strength, flexural strength and flexural modulus of WPCs increase first and then decrease. The impact strength decreases from 3.32 kJ/m2 to 2.94 kJ/m2, the retention rate is 88.55%; the flexural strength and flexural modulus by 68.58 Mpa and 3.92 Gpa, respectively. WPCs crystallization and thermal properties decrease slightly. Microstructures of the composites are examined to understand the mechanisms for the wood-plastic interaction which affects the water absorption and thickness swelling. Our work demonstrates that using polydopamine treatment wood flour for preparing WPCs can be an efficient way to improve the water resistance of WPCs.
机译：本文旨在研究木粉/聚丙烯复合材料的吸水率及其对尺寸稳定性和结晶性能的影响。木塑复合材料（WPC）使用聚多巴胺改性的木粉（WF-D），纯聚丙烯，马来酸酐接枝聚丙烯（MA）和抗氧化剂，通过热压成型制造。复合材料的吸水率（WA），厚度膨胀率（TS）和挠曲性能破坏已在一定的浸泡时间范围内进行了研究。发现WA和TS随着WF含量和浸入时间的增加而增加。浸泡8天后，WPC的吸水率和厚度溶胀分别为0.85％和0.99％。随着浸泡时间的延长，木塑复合材料的冲击强度，抗弯强度和挠曲模量先增大后减小。冲击强度从3.32kJ / m2降低到2.94kJ / m2，保持率为88.55％。弯曲强度和弯曲模量分别为68.58 Mpa和3.92 Gpa。 WPC的结晶和热性能略有下降。检查了复合材料的微观结构，以了解影响吸水率和厚度膨胀的木塑作用机理。我们的工作表明，使用聚多巴胺处理木粉制备木塑复合材料可以是提高木塑复合材料耐水性的有效方法。

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