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    彭尧, 刘如, 曹金珍. 木粉-聚乳酸复合材料的染色及其性能评价[J]. 北京林业大学学报, 2013, 35(5): 123-127.
    引用本文: 彭尧, 刘如, 曹金珍. 木粉-聚乳酸复合材料的染色及其性能评价[J]. 北京林业大学学报, 2013, 35(5): 123-127.
    PENG Yao, LIU Ru, CAO Jin-zhen.. Dyeing of the wood flour-poly(lactic acid) composite and its property evaluation.[J]. Journal of Beijing Forestry University, 2013, 35(5): 123-127.
    Citation: PENG Yao, LIU Ru, CAO Jin-zhen.. Dyeing of the wood flour-poly(lactic acid) composite and its property evaluation.[J]. Journal of Beijing Forestry University, 2013, 35(5): 123-127.

    木粉-聚乳酸复合材料的染色及其性能评价

    Dyeing of the wood flour-poly(lactic acid) composite and its property evaluation.

    • 摘要: 为了丰富木塑复合材料的颜色以扩大其用途,并探索色素对木塑复合材料综合性能的影响及其机理,以毛白 杨木粉和生物降解塑料———聚乳酸为原料,选用3 种食品级色素(胭脂红、柠檬黄、果绿)在不同添加量的条件下制 备染色木粉鄄聚乳酸复合材料。对染色后的复合材料进行耐水洗坚牢度、吸水吸湿性、弹性模量、抗弯强度等物理 力学性能测试,并用红外光谱进行表征。结果表明:1)添加色素可以不同程度地改变木粉鄄聚乳酸复合材料的颜 色,但色素添加量越多,复合材料的耐水洗坚牢度越弱,且高温比室温水浴使材料褪色更加明显。2)添加色素会不 同程度地降低复合材料的抗弯强度,但对材料的弹性模量影响不大。果绿色素添加量为2%时,对复合材料的抗弯 性能影响最小。3)果绿色素添加量为2%时,染色复合材料的吸水、吸湿性最小,与未添加色素的空白组接近。4) FT鄄IR 表明,色素在制造过程中发生了变化或者与木材细胞中的物质产生了反应。5)色素的种类和添加量对木粉鄄 聚乳酸复合材料的染色及物理力学性能均有一定程度的影响。添加果绿色素且当其添加量为2% 时,复合材料的 综合性能达到最优。

       

      Abstract: In order to enrich the colors of wood flour ( WF)-polymer composites and then expand their applications, and also to investigate the influence and mechanism of colorants on overall properties of the composites, nine groups of wood flour-poly (lactic acid) (PLA) composites were prepared in this study by using wood flour of poplar (Populus tomentosa Carr. ) and biodegradable polymer PLA composites as raw materials and three types of food-grade colorants (carminum, tartrazine and fruit green) as additives. The loading levels of colorants were 1%, 2%, and 4%, respectively. Then, some physical and mechanical properties of the composites were tested, including washing resistance, flexural property, water uptake and dimension stability. FT-IR analysis was also used for characterization. The results showed that: 1) the colorants changed color of the composites to different extents. With the increasing loading of colorants, the washing resistance decreased and the reduction was more significant at higher temperature; 2) colorants reduced flexural strength of the composites to different extents, but it had little impact on flexural modulus. In this study, 2% fruit green affected less on flexural properties of the composites; 3) with fruit green addition of 2%, the water absorption and thickness swelling rate of the composites were the lowest and closed to the values of control without colorants; 4) FT-IR analysis showed that the colorants changed in processing or reacted with some substances in wood. In conclusion, both the type and loading level of colorants had effects on the color, physical and mechanical properties of WF-PLA composites. In this study, the overall properties of the composites reached the optimum when adding 2% fruit green.

       

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