کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
754242 895822 2016 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ultrasound-assisted conversion of alpha-chitin into chitosan
ترجمه فارسی عنوان
تبدیل آلفتا کیتین به کیتوزان به کمک سونوگرافی کمک می کند
کلمات کلیدی
کیتین، کیتوزان، سوزانده شدن از طریق سونوگرافی،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی
This paper discusses the production of chitosan by applying high intensity ultrasound irradiation to alpha-chitin suspended in 40% aqueous sodium hydroxide. The average degree of acetylation (DA) of chitosan was determined by 1H NMR spectroscopy and titrimetry while its viscosity average molecular weight (Mv) was calculated from the intrinsic viscosity as determined by capillary viscometry. The results show that fully acid-soluble chitosans (DA < 32%; 100,000 g/mol ⩽ Mv ⩽ 200,000 g/mol) are produced at very high yield (>95%) by applying non-isothermal ultrasound-assisted N-deacetylation process to alpha-chitin suspension (44 mg/mL). It is also shown that such a process is more efficient than thermochemical N-deacetylation, even being carried out at a lower temperature due to the effects of high intensity ultrasound irradiation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Acoustics - Volume 103, Part B, February 2016, Pages 239-242
نویسندگان
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