Production of cellulose aerogels from coir fibers via an alkali-urea method for sorption applications

被引:73
作者
Fauziyah, Mar'atul [1 ]
Widiyastuti, Widiyastuti [1 ]
Balgis, Ratna [2 ]
Setyawan, Heru [1 ]
机构
[1] Sepuluh Nopember Inst Technol, Fac Ind Technol, Dept Chem Engn, Kampus ITS Sukolilo, Surabaya 60111, Indonesia
[2] Hiroshima Univ, Dept Chem Engn, Grad Sch Engn, 1-4-1 Kagamiyama, Higashihiroshima, Hiroshima 7398527, Japan
关键词
NaOH-urea system; Absorbent; Adsorbent; Coir fibers; Cellulose aerogel; CARBON NANOFIBER AEROGEL; METHYLENE-BLUE; LIGNOCELLULOSE AEROGELS; DISSOLUTION; ADSORPTION; LIGNIN; CRYSTALLINITY; FABRICATION; HYDROXIDE; REMOVAL;
D O I
10.1007/s10570-019-02753-x
中图分类号
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号
0805 ; 080502 ; 0822 ;
摘要
Biodegradable cellulose aerogels have been successfully prepared from coir fibers using a sulfur-free method and NaOH-urea system. Sulfur was avoided during pretreatment because it is environmentally harmful. Interestingly, these pretreatments had a strong effect on the physical properties of the aerogels produced. Good physical properties of the cellulose aerogels were obtained when the Kappa number, i.e., the lignin content, in the pulp was lower than 14.8. NaOH-urea played an important role in transforming cellulose I to cellulose II and crosslinked cellulose to form an aerogel structure. The aerogel had a macroporous structure, ultralight density, high porosity, good durability, and thermal stability. The aerogel was capable of absorbing 22 and 18 times its dry weight in water and oil, respectively. The material also had a high capacity for methylene blue dye adsorption of up to 62 g/g, which was one hundred times higher than that of adsorbents synthesized from the other natural matters. Therefore, the prepared aerogels have potential for various sorption applications. [GRAPHICS] .
引用
收藏
页码:9583 / 9598
页数:16
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