Development Of Weft-knitted Biaxial Fabric Reinforced Three-dimensional Medical Splint

With the development and progress of the society,the speed of material renewal is getting faster and faster,and people's awareness of environmental protection is comming stronger and stronger.Composite materials penetrate into various industries with their excellent properties such as light weight,high strength and high modulus.However,most of the composite materials are still a major problem in post-disposal post-disposal.Therefore,the research on textile green composite materials has been studied in recent years.Composite materials are used in aviation,military industry,transportation,industry,medical and other fields.This thesis focuses on medical composite splint.Medical splint is an important fixture for the treatment of bone injuries.For a long time,most of the medical materials for bone injury have used gypsum,small splint and other materials.These splint materials have their own defects in the use process,such as heavy and non-waterproof gypsum materials and poor molding of small boards,leading to poor comfort for patients.Therefore,the medical splint researched is tend to the textile composite splint in recent years.The polymer water-cured splint currently used in clinical practice is integrally formed,and the operation is simple,but its formability is poor and expensive,and it is not widely used.Therefore,in this thesis,MBWK fabric was prepared from fully degradable cotton fiber for the first time as the reinforcement of medical splint material,and a personalized MBWK fabric reinforced three-dimensional medical splint was developed by using safe and environmentally friendly waterborne polyurethane as the resin matrix,and the properties of composite splint were studiedIn thesis,four kinds of composite materials were prepared by two kinds of weft-knitted biaxial fabrics,7140 acrylic modified polyurethane and 5136 epoxy modified polyurethane,which were composed of [0/0] and [0/90].The test and results of tensile,bending and compression properties were analyzed.It was found that the mechanical properties of [0/0]-5136 epoxy modified polyurethane matrix composites are the best,so [0/0]-5136 Epoxy modified polyurethane-based composites are the best process for preparing medical splints.By comparing the mechanical properties of [0/0]-5136 epoxy modified polyurethane matrix composite splint with that of polymer medical splint,the experimental results show that the mechanical properties of the splint prepared in this paper are superior to that of polymer splint,which meets the current mechanical performance requirements for commercial medical splints.The individuality of splint is mainly reflected in two aspects: one is the formability of splint in complex surface;Another is the controllability of splints.For the complex surface forming of splints,it is mainly reflected by the forming Angle of warp lining and weft lining laying on the surface.Due to the particularity of MBWK fabric structure,splints have good formability.This thesis expounds the controllability of splint from two aspects: the range of comfortable clamping force of splint and the regulation of interplate spacing.Through investigation and research experiments,the change in the relative displacement between the splint is functionally related to the force on the splint,which can provide a reference for the subsequent development of medical splints.