اصلاح شیمیایی سطحی نانوالیاف سلولزی با فتالیمید به منظور ساخت فیلتر هوا برای جذب دی اکسیدکربن

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران

2 دانشیار، گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران

3 استاد، پژوهشکده فناوری‌های شیمیایی، سازمان پژوهش‌های علمی و صنعتی ایران، تهران، ایران

چکیده

                                                                                                  DOR:98.1000/1735-0913.1397.33.531.65.4.32.1606
کاربردهای نانومواد تجدیدپذیر، مانند نانوالیاف سلولز(CNFs)، به دلیل خواص منحصر به فرد شامل: سطح ویژه بالا، ضریب لاغری بالا، زیست تخریپ‌پذیر، دسترسی آسان و گروه‌های هیدروکسیل واکنش‌پذیر موجود در سطح اخیراْ مورد توجه بسیاری قرارگرفته است. هدف از این پژوهش، ساخت فیلترهای نانویی تجدیدپذیر هوا با استفاده از CNFs اصلاح شده با فتالیمید می‌باشد. چون فتالیمید حاوی گروه‌های آمینی می‌باشد که برای جذب دی‌اکسید کربن لازم می‌باشد. در این تحقیق از روش خشک‌کن انجمادی برای حذف مستقیم آب از ژل CNFs خالص و اصلاح شده با فتالیمید استفاده شد همچنین خواص آئروژل‌های CNFsخالص و اصلاح شده با فتالیمید به منظور جذب دی اکسید کربن بررسی گردید. اصلاح CNFs با فتالیمید در اسید استیک با نسبت CNFs به فتالیمید 1: 0، 1: 0.5، 1: 1 و 1: 1.5درصد وزنی انجام شد. خصوصیات شیمیایی و مورفولوژیکی CNFs اصلاح شده با تکنیک‌های مختلفی شامل SEM، FTIR-ATR، XRD و TGA بررسی شد. بررسی انجام شده توسط SEM هیچ تغییری در ابعاد و ساختار CNFs اصلاح شده نشان نداد. حضور فتالیمید با ایجاد پیک‌های جدید NH2، C-N و استر (〖COO〗^-) بر روی CNFs اصلاح شده با استفاده از آزمون طیف سنجی ATR-FTIR تأیید شد. همچنین، نتایج TGA نشان داد که با افزایش مقدار فتالیمید، پایداری حرارتی کاهش می-یابد که نشان‌دهنده واکنش‌پذیری گروهای عاملی فتالیمید باCNFs است. به علاوه، بیشترین جذب دی اکسیدکربن مربوط به فتالیمید 1.5 درصد حدود 50 درصد بود

کلیدواژه‌ها


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