Rhodamine Modified Polymer Materials And Their Metal Ion Response Properties

Functional polymer materials refer to a class of polymer materials with special functional groups.Signal response performance refers to the performance of optical,mechanical,or other physical signal changes in response to changes in external material concentration,light,and temperature.Functional polymer materials with signal response performance are widely used in modern production and life,and increasingly become indispensable materials for human production and life.In this paper,rhodamine-ethylenediamine is bonded to two types of polymer materials,namely water-based polyurethane and cellulose acetate.It is expected that the photochromic ability of the polymer material and the effect on the metal will be provided without affecting the mechanical properties of the polymer material.Ionic response and other properties.The rhodamine-ethylenediamine compound was first synthesized,and the structure was characterized and analyzed by Proton NMR.The characterization results showed that the rhodamine-ethylenediamine compound was successfully synthesized.Functional modification of water-based polyurethane and cellulose acetate materials,two kinds of functional polymer material emulsions（solutions）with different rhodamine-ethylenediamine addition amounts were synthesized,and each of them was prepared by the extension method and sedimentation method Thin film.The effects of different percentages of rhodamine-ethylenediamine synthesized on the stability and solid content of polymer emulsions or solutions,and the mechanical properties(elongation at break,（Modulus,tensile strength）,p H of functional polymer solution,photochromic ability,response to metal ions and other properties.The results show that Rhodamine-ethylenediamine modified polymer materials with different percentages have better stability,and the solid content of the emulsion or solution is relatively stable.When the rhodamine-ethylenediamine compound is added at 0.8%,The mechanical properties of the functionalized water-based polyurethane film are relatively good.Compared with the non-additive polyurethane,the mechanical properties and other parameters are not much different,and the resistance to deformation is better.The photochromic performance test was performed on a functional water-based polyurethane film with a good overall performance of rhodamine-ethylenediamine added at 0.8%.The test results show that the functional water-based polyurethane film material has photochromic ability and is relatively long.Under the light condition of time,the fluorescence response time is long,and heating can be recovered.The addition of 0.8%functionalized aqueous polyurethane solution has selective fluorescence enhancement of Mg^2+,and the fluorescence response intensity also increases linearly with the concentration of Mg²⁺.The modification study of functionalized cellulose acetate found that when rhodamine-ethylenediamine was added in an amount greater than 1%,a small amount of sedimentation of the functionalized cellulose acetate solution was caused.When the amount of rhodamine-ethylenediamine was increased from 0 to 2%,the solid content of the functionalized cellulose acetate solution fluctuated between 51% and 56%.The mechanical properties of functionalized water-based cellulose acetate films are relatively good.Compared with non-added films,the mechanical properties and other parameters are not much different,and the resistance to deformation is relatively stable.A functionalized cellulose acetate solution containing 1%rhodamine-ethylenediamine with a good overall performance was selected for the ion response test.The experiments showed that the functionalized cellulose acetate solution had a fluorescence-enhanced response to Li⁺,and with the concentration of Li⁺With the increase,the fluorescence response intensity also increases linearly.The rhodamine-ethylenediamine compound modified functional polymer materials developed in this research have provided these polymer materials with photochromic ability and corresponding response to metal ions under the premise of ensuring that there is no significant difference in their physical and chemical properties.It provides new possibilities for the new application direction of such functional polymer materials.