Grafting Modification Of Polypropylene Non-woven With Biological Source Macromolecules

Polypropylene（PP） non-woven fabric（NWF） are familiared as a medical materials, therefore, it requires special functions such as Antibacterial and other biocompatible. Because of the lack of reactive groups on polypropylene surface, it need to be surface modified and given the biological health protecting. Biomolecules due to environmental, renewable resources, biodegradable, are becoming the focus of green machining applications. In this paper, A combination technique of low-temperature plasma and chemical grafting is used to graft the animal macromolecules and plant extract two types of molecules of biological origin, the NWF-PP fibrous material is introduced into the field of biomedical research.In order to introduce the reaction mass into the NWF. Firstly, the cleaned NWF will be preconditioning by using plasma pretreatment（N₂, NH₃, O₂） glow discharge technique, to give the corresponding reactivity. During the experiment, three process parameters will be optimize treated.In the Modified by graft animals macromolecules process. An epoxy type compound（ethylene glycol diglycidyl ether（EGDE）, and triglycidyl isocyanurate（of TGIC）） as a crosslinking agent, respectively, so that occurs fixation reaction between the animals molecules（collagen and chitosan） and plasma treatment NWF. Among them, the number of the group factor in the different atmosphere plasma reacts in the fiber surface optimization process. In addition, reaction conditions which may affect the graft the rate accordingly been investigated.In the modified by graft Plant extracts process, based on the effective results of plasma treatment on animal origin molecular modified grafting, selected nitrogen plasma discharge NWF-PP grafting reaction later. Experiment, using an isocyanate type（isophorone diisocyanate（IPDI）） and the ring nitrogen type（trimethylolpropane- tris（3 aziridinyl） propionate（TTMAP）） bridging action of the compound, respectively, so that plant extracts（shikimic acid and asiatic acid） grafted onto the ammonia plasma treated PP sample. The relationship between Grafting effect of plant-derived molecules and the reaction parameters are analyzed and discussed.Analysis of research and testing, the change of surface chemical composition of before and after plasma modificated and molecules grafting is characterized by the spectra of attenuated total reflection flourier transformed infrared spectroscopy（ATR-FTIR） and X-ray photoelectron spectroscopy（XPS） The surface morphology of the treated and untreated PP fabric is observed by field emission scanning electron microscope（FESEM）. Through antimicrobial and wound healing tested to determine its biological health performance. In addition, by NWF-PP fabric stiffness, permeability and wettability test, analyze the use of performance.Experimental results show that, molecules of biological origin can be successfully grafted to NWF surfacethe, Highest animal macromolecules grafting rate of weight gain can reach 3.47%, the highest plant source molecular weight of graft rate can reach 3.08%. The sample after grafted with good performance and have some antibacterial and wound healing properties, its biocompatibility effect is almost equivalent to the commercial dressings.