تولید کاغذ تست لاینز با الیاف اصلاح‌شده occو اتصال‌دهنده عرضی سدیم‎ کازئینات

نویسندگان
نورالدین نظرنژاد 1
مهران پرستار 2
1 دانشیار صنایع چوب و مواد لیگنوسلولزی دانشگاه علوم کشاورزی و منابع طبیعی ساری
2 دانشجوی دکتری دانشگاه علوم کشاورزی و منابع طبیعی ساری
10.22034/FSCT.21.157.67
چکیده
در حال حاضر رقابت خیلی زیادی برای بازیافت کاغذهای باطله و استفاده از آن برای تولید انواع کاغذ مورداستفاده در بخش بسته‌بندی وجود دارد. کاغذ حاصل‌ از خمیرهای‌ بازیافتی‌ بـه‌ علت‌ کوتـاه شـدن تدریجی‌ الیاف و کاهش ویژگـی‌ پیونـدیابی‌ مقاومت‌ خوبی‌ نـدارد. با توجه به این چالش در این مطالعه پس از تبدیل کارتن‌های کنگره‎ای کهنه(occ) به خمیرکاغذ و سپس پالایش آن‌ها، جهت ایجاد تنوع و افزایش گروه‌های واکنش‌پذیر با درصدهای متفاوت 4، 3، 2، 1، 5/0، 0 توسط پروکسید هیدروژن در محیط قلیایی اکسید شدند. سپس سدیم‎کازئینات در سطوح 5،6،7،8،9 4، 3، 2، 1، 5/0درصد به‌عنوان اتصال‌دهنده عرضی به سوسپانسیون خمیر اضافه شد. درنهایت از آن‎ها کاغذهای دست‎ساز استاندارد تهیـه گردید. وضعیت گروه‌های عاملی تشکیل‌شده توسط طیف FTIR و مقاومت‎های مکانیکی جذب آب کاغذهای ساخته‌شده طبق استانداردهای انجمن فنی صنعت خمیر و کاغذ آمریکا (TAPPI) اندازه‌گیری شدند. نتایج FTIR نشان داد که نمونه‎های خمیر اکسیدشده جذب بالایی را در عدد موج 1650 داشته­اند که مربوط به گروه کربوکسیل است. همچنین محاسبه مقدار گروه‌های کربوکسیل با روش جذب متیلن‎بلو نشان داد که بیشترین مقدار کربوکسیل در تیمار 1درصد پروکسیدهیدروژن بوده است. با افزودن سدیم‎کازئینات به سوسپانسیون خمیر، مقاومت‎های مکانیکی کاغذ‎های حاصله به‌صورت معنی‎دار افزایش‌یافته است.
کلیدواژه‌ها
اصلاح سطح الیاف
اکسایش الیاف
کازئین
بسته‌بندی

موضوعات

عنوان مقاله English

Production of test lines paper with occ modified fibers and sodium caseinate crosslinker

نویسندگان English

Noureddin nazarnezhad 1
Mehran Parastar 2
1 Associate Professor of Wood Industry and Lignocellulosic Materials, Sari University of Agricultural Sciences and Natural Resources
2 Ph.D. student of Sari Agriculture and Natural Resources University
چکیده English

Currently, there is significant competition for recycling waste paper and using it to produce various types of paper used in the packaging industry. Recycled paper, due to the gradual shortening of fibers and the reduction of bonding properties, does not have good resistance. Given this challenge, in this study, after converting Old congressional cartons (occ) paper into pulp and then refining it, to create diversity and increase reactive groups at different percentages of 4, 3, 2, 1, 0.5%, and 0% by hydrogen peroxide were oxidized in an alkaline environment. Then, sodium caseinate was added as a sizing agent at levels of 5, 6, 7, 8, 9, 4, 3, 2, 1, 0.5% to the pulp suspension. Finally, standard handmade papers were prepared from them. The status of the formed functional groups was determined by FTIR spectra and the mechanical properties and water absorption of the produced papers were measured according to Standards of the Technical Association of the American Pulp and Paper Industry (TAPPI) standards. FTIR results showed that oxidized pulp samples had high absorption at the 1650 cm^-1 wave number, which corresponds to the carboxyl group. Also, the calculation of carboxyl groups by methylene blue adsorption method showed that the highest amount of carboxyl was in the 1% hydrogen peroxide treatment. By adding sodium caseinate to the pulp suspension, the mechanical properties of the resulting papers significantly increased.

کلیدواژه‌ها English

fiber surface modification
fiber oxidation
Casein
packaging
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