Proton Exchange Performance of Microfibrillar Cellulose/Lignin Sulfonate Composite Membrane
The article proposed a"micro-dissolution-welding"strategy tailored for microfibrillar cellulose(MFC).MFC was"micro-dissolved"in Urea/NaOH solution and the MFC fibers were"welded"together in coagulation bath,resulting in the formation of an MFC/lignosulfonate composite membrane.The mechanical properties,swell-ing behavior,and proton transport properties of this composite membrane in moisture environment were investigated.The mechanical strength and the the young's modulus of the resultant MFC/lignosulfonate composite membrane are 3.7±0.2 MPa and 58.6±3.9 MPa,respectively.The water absoiption and planer swelling ratio of the composite membrane in water are(82±1)％and(13±2)％,respectively.The proton conductivity of the composite membrane at 80 ℃ reaches 0.056 S/cm,and its methanol permeability coefficient is 2.86x10-6 cm2/s.The proposed"micro-dissolution-welding"strategy has promising applications in the field of cellulose-based functional membranes.
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维普
