This study focused on the production of polypropylene(PP)/silver(Ag)composites via additive manufacturing.This study aimed to enhance the quality of medical-grade PP in material extrusion(MEX)three-dimensional printin...This study focused on the production of polypropylene(PP)/silver(Ag)composites via additive manufacturing.This study aimed to enhance the quality of medical-grade PP in material extrusion(MEX)three-dimensional printing(3DP)by improving its mechanical properties while simultaneously adding antibacterial properties.The latter can find extremely important and versatile properties that are applicable in defense and security domains.PP/Ag nanocomposites were prepared using a novel method based on a reaction occurring while mixing appropriate quantities of the starting polymers and additives,namely polyvinylpyrrolidone(PVP)as the matrix material and silver nitrate(AgNO_(3))as the filler.This process produced three-dimensional(3D)printed filaments,which were then used to create specimens for a series of standardized tests.It was found that the mechanical properties of the nanocomposites were enhanced in relation to pristine PP,especially for the PP matrix with various loadings of AgNO_(3)and PVP,such as 5.0 wt%and 2.5 wt%,respectively.The voids,inclusions,and actual-to-nominal dimensions also showed improved results.The 3DP specimens exhibited a more effective biocidal performance against Staphylococcus aureus than Escherichia coli,which developed an inhibition zone only in the case of PP with filler loading percentages of AgNO_(3)and PVP at 10.0 wt%and 5.0 wt%,respectively Compounds possessing such properties can be beneficial for various applications requiring increased mechanical properties and biocidal capabilities,such as in the Defence or medical industries.展开更多
利用反应性增容方法制备了丁苯橡胶(SBR)/废胶粉(SRP)弹性体合金,并研究了反应性增容剂对SBR/SRP弹性体合金的结构与性能的影响。结果表明,当丁苯橡胶100份、增容剂用量9份、废胶粉(粒径80 m esh)用量45份时,弹性体合金的力学性能最佳...利用反应性增容方法制备了丁苯橡胶(SBR)/废胶粉(SRP)弹性体合金,并研究了反应性增容剂对SBR/SRP弹性体合金的结构与性能的影响。结果表明,当丁苯橡胶100份、增容剂用量9份、废胶粉(粒径80 m esh)用量45份时,弹性体合金的力学性能最佳。差示扫描量热仪和动态力学分析的结果显示,加入增容剂后,弹性体合金的玻璃化转变温度发生位移,SBR与SRP的相容性提高。扫描电镜和透射电镜的结果揭示,加入增容剂后,废胶粉的粒子被丁苯橡胶基体包覆,两相间粘合力大大增强。展开更多
文摘This study focused on the production of polypropylene(PP)/silver(Ag)composites via additive manufacturing.This study aimed to enhance the quality of medical-grade PP in material extrusion(MEX)three-dimensional printing(3DP)by improving its mechanical properties while simultaneously adding antibacterial properties.The latter can find extremely important and versatile properties that are applicable in defense and security domains.PP/Ag nanocomposites were prepared using a novel method based on a reaction occurring while mixing appropriate quantities of the starting polymers and additives,namely polyvinylpyrrolidone(PVP)as the matrix material and silver nitrate(AgNO_(3))as the filler.This process produced three-dimensional(3D)printed filaments,which were then used to create specimens for a series of standardized tests.It was found that the mechanical properties of the nanocomposites were enhanced in relation to pristine PP,especially for the PP matrix with various loadings of AgNO_(3)and PVP,such as 5.0 wt%and 2.5 wt%,respectively.The voids,inclusions,and actual-to-nominal dimensions also showed improved results.The 3DP specimens exhibited a more effective biocidal performance against Staphylococcus aureus than Escherichia coli,which developed an inhibition zone only in the case of PP with filler loading percentages of AgNO_(3)and PVP at 10.0 wt%and 5.0 wt%,respectively Compounds possessing such properties can be beneficial for various applications requiring increased mechanical properties and biocidal capabilities,such as in the Defence or medical industries.
文摘利用反应性增容方法制备了丁苯橡胶(SBR)/废胶粉(SRP)弹性体合金,并研究了反应性增容剂对SBR/SRP弹性体合金的结构与性能的影响。结果表明,当丁苯橡胶100份、增容剂用量9份、废胶粉(粒径80 m esh)用量45份时,弹性体合金的力学性能最佳。差示扫描量热仪和动态力学分析的结果显示,加入增容剂后,弹性体合金的玻璃化转变温度发生位移,SBR与SRP的相容性提高。扫描电镜和透射电镜的结果揭示,加入增容剂后,废胶粉的粒子被丁苯橡胶基体包覆,两相间粘合力大大增强。
