توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Nanofibrous chitosan–polyethylen oxide mats containing green tea extract
نویسنده(ها): ،
اطلاعات انتشار: دومین کنفرانس بین المللی یافته های نوین پژوهشی در شیمی و مهندسی شیمی، سال
تعداد صفحات: ۶
Nanofibrous CS–PEO mats containing 2% and 4% of green tea (GT) aqueous extract were developed by electrospinning method. The FE–SEM micrographs of the mats exhibited that in both cases very uniform fibers free of any nanobeads and droplets were formed that were about 90 nm in size. The tensile strength analysis revealed that the elongation at break of the mat including 2% GT is slightly higher while its tensile strength is very much smaller than that of the mat loaded by 4% GT. The swelling percent was decreased by increasing the GT percent from 2 to 4% and this may be attributed to the enhanced interaction of the amino NH2, C(O)NH2 and OH groups of the chitosan and PEO polymers with the OH groups of GT leading to a less hydrophilic mat surface, thus reducing the attraction by the aqueous medium. Moreover, the swelling was the highest in acidic medium but it was decreased in the neutral environment and it had the least value within the alkaline medium.<\div>

۲Fabrication of chitosan–polyethylen oxide nanofiber mats containing green tea extract
نویسنده(ها): ،
اطلاعات انتشار: دومین کنفرانس بین المللی یافته های نوین پژوهشی در شیمی و مهندسی شیمی، سال
تعداد صفحات: ۶
Herein, CS–PEO nanofibrous mats containing 0% and 1% of green tea (GT) aqueous extract were developed by electrospinning technique. The FE–SEM micrographs of the mats exhibited that in both cases very uniform fibers free of any nanobeads and droplets were formed that were about 70 nm in size. The tensile strength analysis revealed that the elongation at break of the mat including 1% GT is increased but its tensile strength is decreased. The reason for the higher swelling of the mat by addition of GT can be attributed to the interaction of the amino NH2, C(O)NH2 amido and OH groups of the chitosan and PEO polymers as well as the OH groups of GT with the aqueous medium. Also, the swelling is the highest in acidic medium but it is decreased in the neutral environment and it has the least value within the alkaline medium.<\div>
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