制板工艺因子对硅酸钠/酚醛树脂玉米秸秆刨花板性能的影响
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摘要
采用硅酸钠/酚醛树脂胶制备玉米秸秆刨花板,考察工艺因子对试板物理力学性能的影响。结果表明:随着施胶量增加、热压温度升高、热压时间延长,试板吸水厚度率逐渐减小,静曲强度、弹性模量和内结合强度呈先增大后减小的趋势。按照优化工艺:施胶量17%、热压温度180℃,热压时间20 s/mm,制备试板的吸水厚度膨胀率和力学性能均满足GB/T 4897-2015《刨花板》中干燥状态下使用的家具型刨花板的(P2型)的要求。
Corn straw particleboard samples were manufactured with sodium silicate/phenolic resins.Effects of the resin consumption,hot pressing temperature and pressing time on physical and mechanical properties of the samples were then investigated.24 h-thickness swelling(TS)property of the samples presented a decrease trend while modulus of rupture(MOR),modulus of elasticity(MOE)and internal bond strength(IB)of the samples showed increased and then decreased tendency,with increased resin consumption,hot pressing temperature and hot pressing time Optimized manufacturing parameters were 17% of resin consumption,180℃ of hot pressing temperature,and 20 s/mm of hot pressing time.The TS and mechanical properties of the board samples could meet the requirements of GB/T 4897-2015 for P2 type.
Corn straw particleboard samples were manufactured with sodium silicate/phenolic resins.Effects of the resin consumption,hot pressing temperature and pressing time on physical and mechanical properties of the samples were then investigated.24 h-thickness swelling(TS)property of the samples presented a decrease trend while modulus of rupture(MOR),modulus of elasticity(MOE)and internal bond strength(IB)of the samples showed increased and then decreased tendency,with increased resin consumption,hot pressing temperature and hot pressing time Optimized manufacturing parameters were 17% of resin consumption,180℃ of hot pressing temperature,and 20 s/mm of hot pressing time.The TS and mechanical properties of the board samples could meet the requirements of GB/T 4897-2015 for P2 type.
引文
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[4]罗懿.水溶性酚醛树脂一水玻璃互穿网络结构耐温堵剂的合成与性能评价[J].石油与天然气化工,2016,45(4):55-58.LUO Y.Synthesis and performance evaluation of high temperature plugging agent with IPN gel formed with water soluble phenolformaldehyde resin and sodium silicate[J].Chemical Engineering of Oil&Gas,2016,45(4):55-58.
[5]刘纲勇.木质素酚醛树脂与木材界面反应的研究[J].广东化工,2011,38(3):105-107.LIU Y G.Study on interfacial reaction between wood and lignin phenol formaldehyde Adhesive[J].Guangdong Chemical Industry,2011,38(3):105-107.
[6]Furuno T,Aono S,Uehara T.Mechanical properties of wood-mineral composites using the water glass-boron compound system[J].Journal of the Society of Materials Science,1996,45(6):687-693.
[7]王德福,李春风,刘明利,陈玲,刘彦龙.热处理与硅酸钠联合改性杨木的物理力学性能[J].木材工业,2016,30(6):31-34.WANG D F,LI C F,LIU M L,CHEN L,LIU Y L.Properties of poplar wood modified by a combined process of sodium silicate solution impregnation and heat treatment[J].China Wood Industry,2016,30(6):31-34.