花生蛋白基胶黏剂应用于胶合板热压工艺研究
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摘要
为了推广花生蛋白基胶黏剂在胶合板中的应用以减少甲醛的释放,优化花生蛋白基胶黏剂应用于杨木胶合板热压条件,分析热压条件对胶合板湿态胶合强度的影响。结果表明:4个因素对湿态胶合强度的影响大小依次为:热压温度>热压时间>涂胶量>热压压力;胶合板的最佳热压条件为热压温度120℃、热压时间8 min、热压压力1. 2 MPa、涂胶量220 g/m~2,在此条件下制备的胶合板湿态胶合强度为1. 09 MPa,符合GB/T 9846—2015中I类胶合板的要求(≥0. 70 MPa),且该热压工艺条件在工业化生产中能够实现。红外光谱分析表明固化后花生蛋白基胶黏剂亲水性基团减少,同时酰胺键增加,说明内部基团发生交联反应。
In order to promote the application of peanut protein-based adhesive in plywood to reduce the release of formaldehyde,the hot pressing process of application of peanut-based protein adhesive in plywood was optimized,and the influences of hot pressing conditions on the wet bonding strength of plywood were analyzed. The results showed that the influence of the hot pressing temperature was the greatest,followed by hot pressing time,glue dosage and hot pressing pressure. The optimal hot pressing conditions were obtained as follows: hot pressing temperature 120 ℃,hot pressing time 8 min,hot pressing pressure 1. 2 MPa and glue dosage 220 g/m~2. Under these conditions,the wet bonding strength of plywood was 1. 09 MPa,meeting the requirement for class I plywood( ≥ 0. 70 MPa) in national standard GB/T9846—2015. The hot pressing process could be realized in the industrial production. The infrared spectrum analysis showed that hydrophilic group of solidified peanut protein-based adhesive decreased and amide bond increased,indicating that crosslinking reaction occured in the group.
In order to promote the application of peanut protein-based adhesive in plywood to reduce the release of formaldehyde,the hot pressing process of application of peanut-based protein adhesive in plywood was optimized,and the influences of hot pressing conditions on the wet bonding strength of plywood were analyzed. The results showed that the influence of the hot pressing temperature was the greatest,followed by hot pressing time,glue dosage and hot pressing pressure. The optimal hot pressing conditions were obtained as follows: hot pressing temperature 120 ℃,hot pressing time 8 min,hot pressing pressure 1. 2 MPa and glue dosage 220 g/m~2. Under these conditions,the wet bonding strength of plywood was 1. 09 MPa,meeting the requirement for class I plywood( ≥ 0. 70 MPa) in national standard GB/T9846—2015. The hot pressing process could be realized in the industrial production. The infrared spectrum analysis showed that hydrophilic group of solidified peanut protein-based adhesive decreased and amide bond increased,indicating that crosslinking reaction occured in the group.
引文
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[10]陈奶荣,林巧佳,卞丽萍.改性豆胶胶合板热压工艺优化及固化机理分析[J].农业工程学报,2012,28(11):248-253.
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[13]ABRAHAM R J.Spectrometric identification of organic compounds[M].6th ed.New York:Wiley,1998.
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[2]KUMAR R,CHOUDHARY V,MISHRA S,et al.Adhesives and plastics based on soy protein products[J].Ind Crop Prod,2002,16(3):155-172.
[3]LI J Z,LI X N,GAO Q,et al.Investigating the use of peanut meal:a potential new resource for wood adhesives[J].Rsc Adv,2015,5(98):80136-80141.
[4]LIU Y,LI K.Development and characterization of adhesives from soy protein for bonding wood[J].Int J Adhes,2007,27(1):59-67.
[5]PRASITTISOPIN L,LI K.A new method of making particleboard with a formaldehyde-free soy-based adhesive[J].Compos Part A,2010,41(10):1447-1453.
[6]QI G,LI N,WANG D,et al.Adhesion and physicochemical properties of soy protein modified by sodium bisulfite[J].J Am Oil Chem Soc,2013,90(12):1917-1926.
[7]刘玉兰,鲁燕,马国亮.高温花生粕醇洗浓缩蛋白的水浴加热改性研究[J].中国油脂,2011,36(9):27-30.
[8]李秋.提高高温花生粕营养价值的工艺技术研究[C]//山东营养学会会员代表大会暨学术研讨会.济南:山东省科学技术协会,2013.
[9]LI H,LI C,CHEN H,et al.Effects of hot-pressing parameters on shear strength of plywood bonded with modified soy protein adhesives[J].Bioresources,2014,9(4):5858-5870.
[10]陈奶荣,林巧佳,卞丽萍.改性豆胶胶合板热压工艺优化及固化机理分析[J].农业工程学报,2012,28(11):248-253.
[11]贾翀,吴逸雨,张建光,等.豆胶胶合板制造工艺及性能研究[C]//2013中国木结构绿色产业大会及中国建筑学会建筑结构分会木结构专业委员会木结构学术交流.山西大同:中国建筑学会建筑结构分会木结构专业委员会,2013.
[12]LU T,LIU L Y.Research on adhesive properties and hotpressing process of microcrystalline cellulose modified soy protein[J].Packag Eng,2011,32(21):54-57.
[13]ABRAHAM R J.Spectrometric identification of organic compounds[M].6th ed.New York:Wiley,1998.
[14]HAN M,YANG G,LU J C.Mechanism of adhesive bonding between soy protein-based adhesive and cellulose[J].Packag Eng,2015,35(2):147-152.