National Center for Technical Assistance to Industry (ASTIN), Servicio Nacional de Aprendizaje - SENA, Cali, Colombia.
Faculty of Engineering and Administration, Universidad Nacional de Colombia Campus Palmira, Palmira, Colombia.
Sci Rep. 2020 Jul 15;10(1):11637. doi: 10.1038/s41598-020-68368-6.
Cellulose nanofibers were obtained from the Colombian fique (Furcraea bedinghausii) and Acrylic hydrogels (H) and reinforced acrylic hydrogels with fique nanofibres (HRFN) were synthesized, using the solution polymerization method. The extraction was carried out using a combined extraction method (chemical procedures and ultrasound radiation). The raw material (NAT-F), bleached fibers (B-F), hydrolyzed fibers and fibers treated with ultrasound (US-F) were characterized by infrared spectroscopy (FTIR) and thermal stability analysis; also, in order to have a comparison criterion, a commercial microcrystalline cellulose sample (CC) was analyzed, which demonstrated the extraction of fique cellulose. The surface morphology of the NAT-F and the B-F was determined by scanning electron microscopy and the average particle size of the nanofibers was made through transmission electron microscopy. In H y HRFN the strain percent and compression resistance (Rc) were measured. The fique nanofibers showed diameter and length averages of 25.2 ± 6.2 nm and 483.8 ± 283.2 nm respectively. Maximum degradation temperature was 317 °C. HRFN presented higher compression resistance (16.39 ± 4.30 kPa) and this resistance was 2.5 greater than the resistance of H (6.49 ± 2.48 kPa). The results indicate that fique lignocellulosic matrix has potential application for obtaining polymeric type composite materials.
从哥伦比亚菲克麻（Furcraea bedinghausii）中获得纤维素纳米纤维，并采用溶液聚合方法合成丙烯腈水凝胶（H）和增强型含菲克纳米纤维的丙烯腈水凝胶（HRFN）。采用组合提取方法（化学处理和超声辐射）进行提取。对原料（NAT-F）、漂白纤维（B-F）、水解纤维和经超声处理的纤维（US-F）进行了红外光谱（FTIR）和热稳定性分析；为了有一个比较标准，还分析了商业微晶纤维素样品（CC），证明了菲克纤维素的提取。通过扫描电子显微镜测定了 NAT-F 和 B-F 的表面形态，通过透射电子显微镜测定了纳米纤维的平均粒径。在 H 和 HRFN 中测量了应变百分率和抗压强度（Rc）。菲克纳米纤维的平均直径和长度分别为 25.2±6.2nm 和 483.8±283.2nm。最大降解温度为 317°C。HRFN 表现出更高的抗压强度（16.39±4.30kPa），比 H（6.49±2.48kPa）的抗压强度高 2.5 倍。结果表明，菲克木质纤维素基质具有获得聚合物型复合材料的潜在应用。
