次氯酸钠用量对高强度淀粉胶粘剂性能的影响

本研究在室温条件下,以玉米淀粉为原料,以次氯酸钠为氧化剂,制备氧化淀粉粘合剂。通过测定粘合剂粘度、初粘力、剥离强度、干燥时间,分析配方中氧化剂次氯酸钠用量对粘合剂性能的影响,寻求最佳次氯酸钠用量以达到较好的性能。粘度是氧化淀粉胶粘剂的主要性能指标,它直接影响纸板的生产质量,而影响粘度的因素主要有氧化剂用量、氧化时间、固含量、氢氧化钠用量、氧化温度等。制备氧化淀粉胶粘剂比较适宜的条件为:氧化剂用量(以淀粉重量%计)20%,在此条件下,固体含量达到16.75%;初粘力达到最大,拉毛面积为99%。

Preparation of high strength starch adhesive

The use of starch as a renewable and biodegradable adhesive in packaging industry is becoming increasingly attractive because of the environmental concerns about the industrial wastes generated from petroleum products and the growing awareness of the potential deleterious consequences of greenhouse gas emissions from these activities. This work studies maize starches modi？ed by oxidant NaC10 under room temperature. The impact of the NaC10 dosage is examined with respect to the viscosity, the initially stick force, peel strength, and drying time of the adhesive. The viscosity is a major index for oxidized starch adhesive, which affects the quality of corrugated board produced. The factors influencing the viscosity include oxidant dosage, oxidizing time, solid content, temperature. The results showed the properties of oxidized starch adhesive influenced by the NaC10 dosage significantly. The optimum NaCIO dosage was chosen in order to get the best formula and better performance. The NaCIO dosage optima was of 20%. Under the optimum NaC10 dosage, the solid content, initially stick force, peel strength reached maximum. The performance of the starch adhesive was superior to that of common used ones.