打磨对木粉/聚乙烯复合材料射流等离子体表面处理时效性的影响
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摘要
采用空气气氛的射流等离子体对木粉/聚乙烯复合材料进行表面处理,以改善胶接性能。利用接触角和胶接强度测试以及红外光谱和X-射线光电子能谱分析等方法,研究了表面打磨对复合材料等离子体表面处理时效性的影响。研究结果表明,直接等离子体处理以及打磨后再等离子体处理都可以明显提高复合材料的胶接强度,相比之下,打磨后再等离子体处理可以在复合材料表面形成更多的含氧极性基团,有利于胶接性能的改善。木粉/聚乙烯复合材料的等离子体表面处理存在一定的时效性,与直接等离子体处理的复合材料相比,随着处理试样放置时间的延长,先打磨再等离子体处理的复合材料表面接触角、含氧极性基团以及胶接强度的变化幅度更小,表现出更小的处理时效性。尽管存在处理时效性,但等离子体处理后的胶接强度仍远好于未处理的试样。
The surface of wood powder/polyethylene composites were treated by jet plasma discharge under air atmosphere in order to improve the bonding strength. And the effect of sanding treatment on the surface aging properties were studied by assessing the contact angle and bonding strength, as well as implementing Fourier transform infrared(FTIR) spectroscopy, and X-ray photoelectron spectroscopy(XPS). The results showed that the bonding strength of wood powder/polyethylene composites was improved apparently after direct plasma discharge treatment or sanding and then plasma discharge treatment. Compared with the composites only treated by plasma discharge, there was more oxygen containing groups introduced on the surface of composites treated by sanding and then plasma discharge treatment, which was benefit for improving bonding strength. The aging properties for jet plasma treatment of wood powder/polyethylene composites did exist. With the increase of storage time, the variation of contact angle,the amount of oxygen containing groups and the bonding strength of wood powder/polyethylene composites treated by sanding and then plasma dis-charge treatment changed more slightly than that of the composites only treated by plasma discharge, which showed a less aging. Despite the aging of plasma treatment, the bonding strength of composites after plasma treatment was still much better than that of untreated ones.
The surface of wood powder/polyethylene composites were treated by jet plasma discharge under air atmosphere in order to improve the bonding strength. And the effect of sanding treatment on the surface aging properties were studied by assessing the contact angle and bonding strength, as well as implementing Fourier transform infrared(FTIR) spectroscopy, and X-ray photoelectron spectroscopy(XPS). The results showed that the bonding strength of wood powder/polyethylene composites was improved apparently after direct plasma discharge treatment or sanding and then plasma discharge treatment. Compared with the composites only treated by plasma discharge, there was more oxygen containing groups introduced on the surface of composites treated by sanding and then plasma discharge treatment, which was benefit for improving bonding strength. The aging properties for jet plasma treatment of wood powder/polyethylene composites did exist. With the increase of storage time, the variation of contact angle,the amount of oxygen containing groups and the bonding strength of wood powder/polyethylene composites treated by sanding and then plasma dis-charge treatment changed more slightly than that of the composites only treated by plasma discharge, which showed a less aging. Despite the aging of plasma treatment, the bonding strength of composites after plasma treatment was still much better than that of untreated ones.
引文
[1]王辉,杨伟军,邸明伟,等.偶联剂处理对木塑复合材料胶接性能的影响[J].东北林业大学学报, 2013, 41(4):112~115.
[2]孙恩惠,孙丰文,刘欢欢,等.功能化木粉/低密度聚乙烯热塑母料的制备及界面融合性[J].复合材料学报, 2016, 33(7):1446~1453.
[3] KLMEK P, MORVEK T, RHEL J, et al. Utilization of airplasma treated waste polyethylene terephthalate particles as a raw material for particleboard production[J]. Composites Part B Engineering, 2016, 90:188~194.
[4] WASCHER R, AVRAMIDIS G, VETTER U, et al. Plasma induced effects within the bulk material of wood veneers[J]. Surface&Coatings Technology, 2014, 259:62~67.
[5] HAN Y, MANOLACH S O, DENES F, et al. Cold plasma treatment on starch foam reinforced with wood fiber for its surface hydrophobicity[J]. Carbohydrate Polymers, 2011, 86(2):1031~1037.
[6] MANDOLFINO C, LERTORA E, GAMBARO C. Effect of cold plasma treatment on surface roughness and bonding strength of polymeric substrates[J]. Key of Engineering Materials, 2014, 611~612:1484~1493.
[7]王静,贾彩霞,熊需海,等.等离子体时效性对芳纶表面及复合材料界面性能的影响[J].高分子材料科学与工程, 2014, 30(11):69~72.
[8] VOLPE C D, FAMBRI L, FENNER R, et al. Air-plasma treated polyethylene fibres:effect of time and temperature ageing on fibre surface properties and on fibre-matrix adhesion[J]. Journal of Materials Science, 1994, 29(15):3919~3925.
[9] MAIJU P, HENNA S, KAUKONIEMI O V, et al. Ageing effect in atmospheric plasma activation of paper substrates[J]. Surface&Coatings Technology, 2008, 202(16):3777~3786.
[10]李至仁,刘禹佳,胡蕊,等.等离子体处理工艺对聚乙烯木塑复合材料表面时效性的影响[J].化学与黏合, 2015, 37(5):325~328.
[11]刘杨,邸明伟.聚合物等离子体表面改性时效性的研究进展[J].粘接, 2011(3):79~83.
[2]孙恩惠,孙丰文,刘欢欢,等.功能化木粉/低密度聚乙烯热塑母料的制备及界面融合性[J].复合材料学报, 2016, 33(7):1446~1453.
[3] KLMEK P, MORVEK T, RHEL J, et al. Utilization of airplasma treated waste polyethylene terephthalate particles as a raw material for particleboard production[J]. Composites Part B Engineering, 2016, 90:188~194.
[4] WASCHER R, AVRAMIDIS G, VETTER U, et al. Plasma induced effects within the bulk material of wood veneers[J]. Surface&Coatings Technology, 2014, 259:62~67.
[5] HAN Y, MANOLACH S O, DENES F, et al. Cold plasma treatment on starch foam reinforced with wood fiber for its surface hydrophobicity[J]. Carbohydrate Polymers, 2011, 86(2):1031~1037.
[6] MANDOLFINO C, LERTORA E, GAMBARO C. Effect of cold plasma treatment on surface roughness and bonding strength of polymeric substrates[J]. Key of Engineering Materials, 2014, 611~612:1484~1493.
[7]王静,贾彩霞,熊需海,等.等离子体时效性对芳纶表面及复合材料界面性能的影响[J].高分子材料科学与工程, 2014, 30(11):69~72.
[8] VOLPE C D, FAMBRI L, FENNER R, et al. Air-plasma treated polyethylene fibres:effect of time and temperature ageing on fibre surface properties and on fibre-matrix adhesion[J]. Journal of Materials Science, 1994, 29(15):3919~3925.
[9] MAIJU P, HENNA S, KAUKONIEMI O V, et al. Ageing effect in atmospheric plasma activation of paper substrates[J]. Surface&Coatings Technology, 2008, 202(16):3777~3786.
[10]李至仁,刘禹佳,胡蕊,等.等离子体处理工艺对聚乙烯木塑复合材料表面时效性的影响[J].化学与黏合, 2015, 37(5):325~328.
[11]刘杨,邸明伟.聚合物等离子体表面改性时效性的研究进展[J].粘接, 2011(3):79~83.