玉米淀粉黏合剂的强度相关性研究

Research on the strength correlation of corn starch adhesive

以玉米淀粉为主要原料、硼砂为交联剂、氢氧化钠为氧化剂、十八水硫酸铝为防水剂、聚乙烯醇改性脲醛树脂为黏合强度增强剂、水为溶剂,制备了一种具有黏合强度强的瓦楞纸箱用玉米淀粉黏合剂,并对瓦楞纸箱用玉米淀粉黏合剂的配方进行优化研究。采用单因素变量法分别研究玉米淀粉、硼砂、氢氧化钠、十八水硫酸铝、聚乙烯醇改性脲醛树脂、水用量等因素对黏度和黏合强度的影响。同时使用响应面试验分析法中的中心组合设计(Box-Behnken Design),以黏合强度和黏度为指标,研究配方中影响较大的组分对玉米淀粉黏合剂黏合强度的影响,并结合实际生产筛选出较优配方。研究结果表明:较佳配方(质量比)为玉米淀粉12.5%、氢氧化钠溶液3.7%、硼砂0.42%、十八水硫酸铝0.15%、聚乙烯醇改性脲醛树脂1.75%、水量81.48%。该制备工艺稳定可靠,制备成本较低,具有一定的实用价值。

A corn starch adhesive with strong bonding strength for corrugated box was prepared by using corn starch as the main raw material,borax as the crosslinking agent,sodium hydroxide as the oxidant,aluminum sulfate octadecahydrate as the waterproofing agent,polyvinyl alcohol modified urea-formaldehyde resin as the bonding strength enhancer,and water as the solvent.The formulation of corn starch adhesive for corrugated box was optimized and studied.The single-factor variable method was used to investigate the effects of factors such as the amounts of corn starch,borax,sodium hydroxide,aluminum sulfate octadecahydrate,polyvinyl alcohol modified urea-formaldehyde resin and water on viscosity and bonding strength.At the same time,the central composite design(Box-Behnken Design)in response surface methodology was used to study the impact of the more influential components in the formulation on the bonding strength of corn starch adhesive,with bonding strength and viscosity as the indicators,and the optimal formulation was selected based on actual production.The research results showed that the optimal formulation(mass ratio)was as follows:12.5%corn starch,3.7%sodium hydroxide solution,0.42%borax,0.15%aluminum sulfate octadecahydrate,1.75%polyvinyl alcohol modified urea-formaldehyde resin,and 81.48%water.The preparation process was stable and reliable,with low preparation costs and certain practical value.