Abstract
This study reported a single-step method for the fabrication of magnetic cellulose nanocrystals (MGCNCs) by coprecipitation iron oxide nanoparticle onto cellulose nanocrystals (CNCs). Cellulose nanocrystals (CNCs) were derived by hydrochloric acid hydrolysis (HCl 6 M, 25 mL/g cellulose) in the optimum condition at 90 °C for 90 min. Pure cellulose was isolated from Nypa fruticans branches, a popular tree in Vietnam. The structure and morphology of CNCs were characterized by crystallinity index, morphology and thermal stability. TEM images showed that the average fiber length of the nanocrystals was 410 nm with a diameter of 10 nm (aspect ratio of 41) and the crystallinity index of 85.2 % (by XRD). The as-prepared MGCNCs were characterized by Fourier transform infrared spectroscopy (FTIR), wide-angle X-ray diffraction measurement (XRD), thermal gravity analysis (TGA) and vibrating sample magnetometry (VSM). The results showed that the magnetic cellulose nanocrystals absorbed about 51 % w/w on CNCs surfaces with magnetic properties and the saturation magnetization of about 24 emu/g. Possessing the biocompatibility as well as paramagnetism, the magnetic cellulose nanocrystals were promising materials for environmental treatment.
Highlights
This study reported a single-step method for the fabrication of magnetic cellulose nanocrystals (MGCNCs) by coprecipitation iron oxide nanoparticle onto cellulose nanocrystals (CNCs)
The results showed that the magnetic cellulose nanocrystals absorbed about 51 % w/w on CNCs surfaces with magnetic properties and the saturation magnetization of about 24 emu/g
Magneto-responsive hybrid materials based on cellulose nanocrystals
Summary
Tổng hợp hạt Oxide sắt từ trên bề mặt nano tinh thể Cellulose bằng phương pháp đồng kết tủa. TÓM TẮT Trong bài báo này, chúng tôi tiến hành tổng hợp nano tinh thể cellulose từ tính (MGCNCs) trong một bước bằng phương pháp đồng kết tủa tạo hạt oxide sắt từ (Fe3O4) trên bề mặt nano tinh thể cellulose (CNCs). MGCNCs sau khi tổng hợp được khảo sát thông qua các phương pháp như phổ hồng ngoại biến đổi Fourier (FT-IR), nhiễu xạ tia X (XRD), phân tích nhiệt – khối lượng (TGA) và từ kế mẫu rung (VSM). Từ khoá: nano tinh thể cellulose, hạt nano từ tính, quá trình đồng kết tủa Trường Đại học Khoa học Tự Nhiên, ĐHQG-HCM. Đây là bài báo công bố mở được phát hành theo các điều khoản của the Creative Commons Attribution 4.0 International license
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