瓜尔豆胶清洁胶的流变学性能研究

Study on rheological properties of guar gum cleaning adhesive

该文以瓜尔豆胶为原料、四硼酸钠为交联剂,制备出了可作清洁胶用途的瓜尔豆胶凝胶,通过流变学行为和微观形貌的表征,系统探究瓜尔豆胶交联反应过程的流变学性能与其分子结构、分子运动之间的关系.研究表明,优化条件下制得的瓜尔豆胶凝胶为非牛顿流体,具有剪切变稀的性质,微观上具有相互交联的空间网状结构,在0~60℃的温度范围内以及一定的剪切应变区间内能够维持稳定的化学性质和黏弹性宏观特性,充分体现了高分子链条聚集程度与材料性能之间的构效关系,验证了高分子溶胶-凝胶转变点及非牛顿流体的流变性能,并具有极佳的实际清洁性能.

In this paper,a guar gum gel,which can be used as cleaning adhesive,was prepared using guar gum as raw material as well as antipyonin as crosslinking agent.Within the characterization of rheological behavior and microscopic morphology,the relationship among the rheological properties of guar gum,molecular structure and molecular motion during the crosslinking reaction was systematically investigated.The results shown that the guar gum gel prepared by the optimized conditions is the non-Newtonian fluid with shear thinning property and cross-linked spatial network structure,which maintains stable chemical properties and viscoelastic macroscopic behavior in the temperature range of 0~60℃and a certain shear strain range.It fully reflects the structure-activity relationship between the degree of polymer chain aggregation and material properties,which could effectively help the researchers to further investigate the polymer sol-gel transition point and the rheological properties of non-Newtonian fluid.Furthermore,the guar gum gel can be rolled on the table to remove the dust on the surface of the object,which has great interests and can effectively stimulate the interest in the practical application of polymer materials.