CAJ | 학술논문

针对大豆蛋白胶黏剂耐水性差的缺点，用尿素初步改性大豆分离蛋白（SPI），然后与白乳胶（PVAc）共混合成了共混改性大豆分离蛋白胶黏剂。采用正交实验方法考察了大豆蛋白胶与白乳胶质量比、共混时间、交联剂质量分数、交联时间对大豆蛋白胶黏剂剪切粘接强度的影响，确定了优化配比及制备工艺条件，并在此基础上采用正交试验优化了热压参数。结果表明：大豆蛋白胶与白乳胶质量比10∶1，共混时间1h，交联剂质量分数1.0%，交联时间1.5h，热压温度120℃，热压压强1.2MPa，热压时间2min/mm，涂胶量250g/m2时，测得胶黏剂的干态剪切粘接强度为2.01MPa，按照Ⅰ类胶合板标准测得湿态剪切粘接强度为1.04MPa，并对优化配方进行了结构与性能分析。
침대대두단백효점제내수성차적결점，용뇨소초보개성대두분리단백（SPI），연후여백유효（PVAc）공혼합성료공혼개성대두분리단백효점제。채용정교실험방법고찰료대두단백효여백유효질량비、공혼시간、교련제질량분수、교련시간대대두단백효점제전절점접강도적영향，학정료우화배비급제비공예조건，병재차기출상채용정교시험우화료열압삼수。결과표명：대두단백효여백유효질량비10∶1，공혼시간1h，교련제질량분수1.0%，교련시간1.5h，열압온도120℃，열압압강1.2MPa，열압시간2min/mm，도효량250g/m2시，측득효점제적간태전절점접강도위2.01MPa，안조Ⅰ류효합판표준측득습태전절점접강도위1.04MPa，병대우화배방진행료결구여성능분석。
In order to improve the shortcomings of water-resistant of soy protein isolate(SPI) adhesive, SPI was modified by urea and then poly(vinyl-acetate)(PVAc) latex/urea modified SPI blending adhesives was prepared. The mass ratios of urea modified SPI and PVAc latex,blending time,the contents of crosslinking agent,crosslinking time were investigated by an orthogonal experiment to evaluate their effects on the shear bond strengths. The optimal preparation condition was determined. And based on this formula,the hot pressing parameters were optimized by another orthogonal experiment. The results have shown as follows. The mass ratio of urea modified SPI and poly(vinyl-acetate) latex was 10∶1,the blending time was 1h,the mass concentration of crosslinking agent was 1.0%,the crosslinking time was 1.5h,the hot pressing temperature was 120℃,the hot pressing pressure was 1.2MPa,and the hot pressing time was 2min/mm,the amount of gum was 250 g/m2,the dry shear bond strength was 2.01MPa,and the wet shear bond strength was 1.04MPa by national typeⅠplywood testing standard. The modifying mechanism of blending poly(vinyl-acetate) latex/urea modified SPI adhesives was discussed.