This study reports on an environment-friendly renewable and zero formaldehyde-emission urea-oxidized starch (U-OSt) adhesive based on native corn starch. The adhesive was prepared by polycondensation reaction of oxidized starch and urea. The morphology, molecular structure, crystalline structure, shear strength and viscosity of the adhesive, the native and oxidized starch were instrumentally investigated. The influence of processing factors was studied, such as the oxidizer content, the urea content and the addition of titanium dioxide nanoparticle (nano-TiO₂). The results show the adhesive has an excellent comprehensive performance at urea content of 50% (w/w, dry starch basis) while 5.0% (w/w, dry starch basis) KMnO₄ as oxidizer. The dry shear strength was increased by 16.9% by adding of nano-TiO₂ content of 1.5% (w/w, dry starch basis), and the corresponding viscosity was 4100 mPa s. It is found appropriate amount of nano-TiO₂ played a complementary effect between adhesive and adherend, which enhanced the adhesive property and stability of adhesive.

这项研究报告了一种基于天然玉米淀粉的环保型可再生零甲醛排放尿素氧化淀粉（U-OSt）粘合剂。通过氧化淀粉和尿素的缩聚反应制备粘合剂。对粘合剂，天然淀粉和氧化淀粉的形态，分子结构，晶体结构，剪切强度和粘度进行了仪器研究。研究了氧化剂，尿素含量和二氧化钛纳米颗粒（nano-TiO ₂）的添加等工艺因素的影响。结果表明，该粘合剂在尿素含量为50％（w / w，以干淀粉为基础）而5.0％（w / w，以干淀粉为基础）KMnO _4时具有优异的综合性能。作为氧化剂。通过添加1.5％（w / w，以干淀粉为基础）的纳米TiO ₂含量，干剪切强度提高了16.9％，相应的粘度为4100  mPa  s。发现适量的纳米TiO ₂在胶粘剂和被粘物之间起互补作用，从而增强了胶粘剂的粘合性能和稳定性。