Sammanfattning

This study was carried out to investigate the extraction of cellulose acetate (CA) from cajuput (Melaleuca leucadendron) twigs and sugarcane (Saccharum officinarum) bagasse using an environmentally friendly method. At first, cellulose was extracted from cajuput twigs (CT) and sugarcane bagasse (SB) through prehydrolysis followed by soda (NaOH) pulping and elemental chlorine-free (ECF) bleaching. Later, the extracted cellulose was acetylated using iodine (I) as a catalyst. The obtained CA was characterized by Fourier-transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR), thermal gravimetric analysis (TGA), scanning electron microscope (SEM), and X-ray diffraction. FTIR and NMR analysis proved the replacement of free OH (hydroxyl) groups by acetyl groups. The degree of substitution (DS) showed the acetylation capability of cellulose extracted from CT and SB as well. The diameter of CA and its crystallinity index (CrI) were measured by SEM and X-ray diffraction, respectively. The cellulose content was 85.4 and 89.5% for CT and SB, respectively after the pulping and bleaching. The diameter of CA extracted from CT was approximately 10 mu m and it was approximately 20 to 30 mu m for SB. The CrI of the CA extracted from SB and CT was 75.6 and 60.2, respectively. Furthermore, the thermal gravimetric analysis showed that CA extracted from CT and SB was thermal resistant. Therefore, CT and SB will be potential alternative resources for CA production using the mentioned method.

Nyckelord

Cellulose acetate; Cajuput twig; Sugarcane bagasse; Prehydrolysis; Acetylation

Publicerad i

Waste and Biomass Valorization
2022, Volym: 13, nummer: 3, sidor: 1535-1545
Utgivare: SPRINGER

SLU författare

• Das, Atanu Kumar

  • Institutionen för skogens biomaterial och teknologi, Sveriges lantbruksuniversitet
    

Globala målen

SDG13 Vidta omedelbara åtgärder för att bekämpa klimatförändringarna och dess konsekvenser
SDG9 Bygga motståndskraftig infrastruktur, verka för en inkluderande och hållbar industrialisering samt främja innovation
SDG12 Säkerställa hållbara konsumtions- och produktionsmönster


UKÄ forskningsämne

Polymerkemi


Publikationens identifierare

DOI: https://doi.org/10.1007/s12649-021-01610-y

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/114039