پیوندزنی سطح یک نوع الیاف نایلونی با استفاده از مخلوط دو مونومر اکریلیک و بهینه‌سازی پارامترهای مربوطه توسط یک نرم‌افزار متداول طراحی آزمایش

علوم کاربردی و محاسباتی در مکانیک

مقاله 4، دوره 31، شماره 1 - شماره پیاپی 21، اسفند 1398، صفحه 39-52   

نوع مقاله: مقاله پژوهشی

شناسه دیجیتال (DOI): 10.22067/fum-mech.v31i1.84217

نویسندگان

محمد خسروی؛ سعید استاد موحد^*

فردوسی مشهد

چکیده

زیست رسوب‌گذاری دریایی به تجمعی از انواع ارگانیسم‌ها برسازه‌های فرورفته در آب دریا گفته می‌شود. این پدیده اثرات مخربی بر سازه‌های شناور در آب مانند کشتی‌ها، قفس‌های پرورش ماهی و غیره دارد. به‌منظور کاهش رسوب‌گذاری زیستی بر روی الیاف یک نوع نایلون، مخلوط دو مونومر اکریلیک، 2 - هیدروکسی اتیل متاکریلات و متیل آکریلات به روش پیش‌تابش و در شرایط مختلف بر روی الیاف فوق پیوند زده شد. سپس پارامترهای درصد پیوندزنی و درصد هومو-کو پلیمر با تغییر متغیرهای عملیاتی مانند دمای واکنش (℃۹۰-۶۰)، زمان واکنش h) ۴-۱)، زمان پیش‌تابش min) ۴۰-۱۰) و غلظت آغازگر (۹-۳%)  اندازه‌گیری شده و با مقادیر محاسبه شده توسط  یک نرم‌افزار متداول طراحی آزمایش (®Design-expert) مقایسه گردیده و نتایج مورد بحث قرار گرفتند. جهت بهینه‌سازی نتایج توسط نرم‌افزار و بررسی اثر متقابل متغیرهای فوق جهت پیش‌بینی پارامترهای مذکور، از روش پاسخ سطح و طراحی نقاط مرکزی با استفاده از ۴ متغیر و ۲ سطح پاسخ استفاده شد. افزایش زمان تابش و غلظت آغازگر باعث افزایش درصد پیوندزنی به دلیل افزایش مراکز فعّال بر سطح الیاف شدند. به کمک تحلیل جدول آنالیز واریانس و مقدار متغیر p-valuee با بازه اطمینان ۰۵/۰، پارامترهای مهم در مدل به ترتیب اهمّیّت، دمای واکنش، زمان واکنش، زمان پیش‌تابش و غلظت آغازگر تشخیص داده شدند. همچنین صحت آماری نتایج به‌دست‌آمده به کمک مقادیر متغیرهای آماری مانند ضریب مشخصه‌سازی ( ۹۶٪)، ضریب مشخص‌سازی تنظیم شده (۹۳٪) و تناسب دقّت (۳۰۲/۳۰) مورد تأیید قرار گرفتند. در شرایط بهینه معرفی شده توسط نرم‌افزار، مقادیر پیش‌بینی‌شده توسط مدل پیشنهادی نرم‌افزار عبارت بودند از درصد پیوندزنی، ۵۹/۳۸ و هومووکوپلیمر ۴۲/۴۳ در صد که با مقادیر تجربی به ترتیب ۸۹/۳۷ و ۹۸/۴۲ درصد تطابق مناسبی داشتند. همچنین دو معادله جهت پیش‌بینی مقادیر پارامترها با تغییر متغیرهای مورد مطالعه توسط نرم‌افزار ارائه گردیدند.

کلیدواژه‌ها

الیاف نایلون؛ 2- هیدروکسی اتیل متاکریلات؛ متیل آکریلات؛ درصد پیوندزنی؛ طراحی آزمایش

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EA4-ostadmovahed-Nahayi2.pdf

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