کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5434880 1509146 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of variable aminoalkyl chains on chemical grafting of cellulose nanofiber and their antimicrobial activity
ترجمه فارسی عنوان
اثر زنجیره های آمینوالکالی متغیر بر پیوند شیمیایی نانو فایبر سلولز و فعالیت ضد میکروبی آنها
کلمات کلیدی
نانو فیبرهای سلولز، آمینوسایلان، طول زنجیره آمینوآلکیل، کارکردن و کاهش سلول های باکتریایی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
چکیده انگلیسی


- Cellulose nanofibers were grafted with silanes having variable length of aminoalkyl chain.
- Grafting was conducted to prepare bioinspired contact active antimicrobial with nanofibers.
- Grafting with aminoalkyl alters the surface properties of the nanofibers.
- The length and quantity of aminoalkyl chain significantly affects the antibacterial activity.
- Aminosilane with longest aminoalkyl chain illustrated the highest antibacterial activity.

Recent focus on the preparation of antimicrobial surfaces using cellulose nanofibers (CNF) has gained considerable attention. In this work, functionalization of CNF films in 100% aqueous solution with three different aminosilanes, including 3-aminopropyl trimethoxysilane (APMS), 2-aminoethyl 3-aminopropyl trimethoxysilane (DAMS)and 3-2-(2-aminoethylamino) ethylamino propyl-trimethoxysilane (TAMS) is reported for the fabrication of contact active antimicrobial materials. Grafted CNF films were comprehensively characterized by FTIR, TGA, contact angle, elemental analysis, solid-state 29Si NMR, FEG-SEM and SEM-EDX. It was found that all the silanes were grafted on the surface of nanofibers without any change in the morphology or fibril structure through different grafting efficiency, depending on the aminoalkyl chain length. The effect of variable aminoalkyl length and initial grafting concentration was analyzed against gram-positive (Bacillus subtilis and Staphylococcus aureus) and Gram-negative bacteria (Escherichia coli) by qualitative and quantitative standards. The most promising results were obtained with 3-2-(2-aminoethylamino) ethylamino propyl-trimethoxysilane at very low concentration which completely restrict bacterial growth after 24 h with Gram-positive bacteria. This study, for the first time, established the relationship between the aminoalkyl chain length and its corresponding antibacterial activity.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: C - Volume 75, 1 June 2017, Pages 760-768
نویسندگان
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