高分散水性碳纤维的制备OA北大核心

In this study,chitosan hydrochloride(CHI)and sodium dodecyl sulfate(SDS)were used to prepare modifier(CHI&SDS)that used to impregnate and modify the surface of BMH3 carbon fibers,in order to enhance the dispersing ability of the BMH3 carbon fibers in water.The effects of CHI/SDS mass ratio,mass concentration of CHI&SDS modifier,and fiber length on the dispersibility of modified BMH3 carbon fibers in water were systematically investigated,and the chemical structure and surface wettability of the modified BMH3 car-bon fibers were characterized and tested by X-ray photoelectron spectroscopy and dynamic contact angle test.The results showed that the dis-persion rate of modified BMH3 carbon fibers with fiber length of 5 mm in water could reach 96.2％,which was 87.5 percentage points high-er compared with that of unmodified BMH3 carbon fibers,after modified with a solution of CHI/SDS mass ratio=25∶1 at CHI&SDS modifier mass concentration of 0.15％.The number of oxygen-containing functional groups on the surface of the modified carbon fiber was significant-ly increased,and the water contact angle was significantly reduced,which was the reason for the improved dispersion of the carbon fiber and the basis for the successful preparation of highly dispersed aqueous carbon fiber.