Zein as a natural protein had been widely used in various elds due to its biodegradability and biocompatibility. However, its sensitivity to humidity and poor mechanical performance limited its application in practice. In this study, zein-based composite nano bers loaded with curcumin were prepared by electrospinning assisted with polyvinyl alcohol (PVA). The ltration e ciency of the modi ed nano bers to the particles with diameters larger than 0.5 µm was all above 98%. The loaded curcumin interacted with protein molecular chains to form a network structure within tightly connected nano bers, which exhibited excellent moisture resistance and good adhesion to cellulose paper towels used as air lter substrates. Meanwhile, its tensile strength had also been enhanced vastly to 0.72 MPa compared with the initial tensile strength of 0.21 MPa. This study provides a new electrospinning strategy for the preparation of zein-based composite nano bers that can be widely utilized in air ltration with high moisture resistance.
Although polyvinyl alcohol (PVA) membranes are commonly used for CO 2 separation, there is still large development space in mechanical properties and high selectivity of the gas separation process. In this study, the gas separation performance and mechanical properties of the (PVA/Cu 2+ ) substrate membranes were improved by introducing polyamidoamine (PAMAM). PAMAM had an important effect on the gas adsorption and separation performance of the membrane. In addition, the gas adsorption and separation properties of the PVA/Cu 2+ /PAMAM membrane (PPCm) were analyzed and studied when the inlet gas pressure and the species of mixed gases were variable. The results showed that the crystallinity and mechanical properties of the membrane with the PAMAM had been signi cantly improved. Young's modulus of PPCm with 30% PAMAM was 132% higher than that of the PVA/Cu 2+ composite membrane without PAMAM. In addition, e cient separation e ciency and high selectivity of the gas separation process were observed. The separation factors of the PPCm for CO 2 /H 2 and CO 2 /N 2 were about three times higher than that of the PVA/Cu 2+ substrate membranes. These results suggested that the introduction of PAMAM was promising for CO 2 separation and permeation.
Zein as a natural protein had been widely used in various fields due to its biodegradability and biocompatibility. However, its sensitivity to humidity and poor mechanical performance limited its application in practice. In this study, zein-based composite nanofibers loaded with curcumin were prepared by electrospinning assisted with polyvinyl alcohol (PVA). The filtration efficiency of the modified nanofibers to the particles with diameters larger than 0.5 µm was all above 98%. The loaded curcumin interacted with protein molecular chains to form a network structure within tightly connected nanofibers, which exhibited excellent moisture resistance and good adhesion to cellulose paper towels used as air filter substrates. Meanwhile, its tensile strength had also been enhanced vastly to 0.72 MPa compared with the initial tensile strength of 0.21 MPa. This study provides a new electrospinning strategy for the preparation of zein-based composite nanofibers that can be widely utilized in air filtration with high moisture resistance.
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