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首页> 外文期刊>Acta biomaterialia >Synthesis of a proline-modified acrylic acid copolymer in supercritical CO2 for glass-ionomer dental cement applications.
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Synthesis of a proline-modified acrylic acid copolymer in supercritical CO2 for glass-ionomer dental cement applications.

机译：在超临界CO2中合成脯氨酸改性的丙烯酸共聚物，用于玻璃离聚物牙科水泥应用。

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Supercritical (sc-) fluids (such as sc-CO(2)) represent interesting media for the synthesis of polymers in dental and biomedical applications. Sc-CO(2) has several advantages for polymerization reactions in comparison to conventional organic solvents. It has several advantages in comparison to conventional polymerization solvents, such as enhanced kinetics, being less harmful to the environment and simplified solvent removal process. In our previous work, we synthesized poly(acrylic acid-co-itaconic acid-co-N-vinylpyrrolidone) (PAA-IA-NVP) terpolymers in a supercritical CO(2)/methanol mixture for applications in glass-ionomer dental cements. In this study, proline-containing acrylic acid copolymers were synthesized, in a supercritical CO(2) mixture or in water. Subsequently, the synthesized polymers were used in commercially available glass-ionomer cement formulations (Fuji IX commercial GIC). Mechanical strength (compressive strength (CS), diametral tensile strength (DTS) and biaxial flexural strength (BFS)) and handling properties (working and setting time) of the resulting modified cements were evaluated. It was found that the polymerization reaction in an sc-CO(2)/methanol mixture was significantly faster than the corresponding polymerization reaction in water and the purification procedures were simpler for the former. Furthermore, glass-ionomer cement samples made from the terpolymer prepared in sc-CO(2)/methanol exhibited higher CS and DTS and comparable BFS compared to the same polymer synthesized in water. The working properties of glass-ionomer formulations made in sc-CO(2)/methanol were comparable and better than the values of those for polymers synthesized in water.
机译：超临界（sc-）流体（例如sc-CO（2））代表了在牙科和生物医学应用中合成聚合物的有趣介质。与常规有机溶剂相比，Sc-CO（2）在聚合反应中具有多个优势。与传统的聚合溶剂相比，它具有几个优点，例如动力学增强，对环境的危害小以及简化的溶剂去除过程。在我们以前的工作中，我们在超临界CO（2）/甲醇混合物中合成了用于玻璃离聚物牙科水泥的聚丙烯酸-共-衣康酸-N-乙烯基吡咯烷酮（PAA-IA-NVP）三元共聚物。在这项研究中，含脯氨酸的丙烯酸共聚物是在超临界CO（2）混合物中或在水中合成的。随后，将合成的聚合物用于可商购的玻璃离聚物水泥配方（Fuji IX商业GIC）。评估了所得改性水泥的机械​​强度（抗压强度（CS），径向拉伸强度（DTS）和双轴弯曲强度（BFS））和处理性能（工作和凝固时间）。发现在sc-CO（2）/甲醇混合物中的聚合反应明显快于在水中的相应聚合反应，并且对于前者而言，纯化步骤更简单。此外，与在水中合成的相同聚合物相比，由在sc-CO（2）/甲醇中制备的三元共聚物制成的玻璃离聚物水泥样品显示出更高的CS和DTS以及相当的BFS。在sc-CO（2）/甲醇中制成的玻璃离聚物配方的工作性能具有可比性，并且优于在水中合成的聚合物的值。

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