Preparation of the PLA/PCL@EBS Microfibrous Skin Cover Microfibrous via Melt Blowing Process and Softness
In order to develop new biodegradable microfibers based on poly(lactic acid)(PLA)with a skin cover property,PLA/polycaprolactone(PCL)system was modified by blending with polyethylene glycol(PEG)and ethylene bis(stearate)amide(EBS).The PLA/PCL@EBS microfibers were prepared by melt blown,and then the thermomechanical properties,sample morphology,and softness of the blended polymers were experimentally analyzed.The results reveal that the addition of PCL and EBS weakens the intermolecular forces of PLA macromolecules,improves the movement ability of molecular chains,and enhances the flexibility of the microfibers.Moreover,when the die head temperature is 216 ℃,the microfibers exhibit a maximum longitudinal breaking strength of 64.42 N,which increases 216％comparing to 204 ℃,as well as the elongation at break increases 67％.Furthermore,increasing the die-to-collector distance(DCD)could improve the permeability of the microfibers.When the maximum of DCD is 32 cm,the porosity and permeability could achieve 92.4％and 327.4 mm/s,respectively.Finally,the effects of die head temperature and DCD on the softness score are analyzed by response surface analysis,which provide insights for enhancing the application of PLA/PCL@EBS meltblown nonwoven materials in the field of skin cover.
万方数据
维普
