Obtention of Cellulose Nanofiber from Almond Shell Using Different Chemical Treatments
This study conducted in Trabzon, Turkey, focused on obtaining cellulose nanofibers from almond shells through various chemical treatments. Different procedures involving alkaline solutions, bleaching, hydrolysis, and acetylation were used to remove lignin content and achieve optimal crystallinity. Analysis methods included FTIR, TGA, X-Ray, and AFM. Results showed varying levels of crystallinity and content extracts for different chemical treatments, shedding light on the effectiveness of each process in producing cellulose nanofibers.
Download Presentation
Please find below an Image/Link to download the presentation.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author. Download presentation by click this link. If you encounter any issues during the download, it is possible that the publisher has removed the file from their server.
E N D
Presentation Transcript
October 8-9 Trabzon, Turkey OBTENTION OF CELLULOSE NANOFIBER FROM ALMOND SHELL USING DIFFERENT CHEMICAL TREATMENTS Eduardo Robles, I aki Urruzola, Rodrigo Llano-Ponte, Rodrigo Llano-Ponte, Jalel Labidi Biorefinery Process Group Department of Chemical and Environmental Engineering University of Basque Country Pza. Europa 1, 20018, San Sebastian, SPAIN Correspondence to: jalel.labidi@ehu.es
COST Action FP1105 October 8-9 Trabzon, Turkey Objectives Determining the best chemical treatment to remove lignin content in almond shell (Prunus dulcis) Determining the best crystallinity achieved with the different mercerizations. Analysis: FTIR TGA X-Ray Obtention Of Cellulose Nanofibers From Almond Shell Using Different Chemical Treatments. Eduardo Robles, I aki Urruzola, Rodrigo Llano-Ponte, Jalel Labidi
COST Action FP1105 October 8-9 Trabzon, Turkey Procedure NaOH 7.5% w/w T = 60 C t = 24 h Bleaching NaClO2(25 % w/w) T = 75 C t = 120 min NaOH 15% w/w T = 120 C t = 90 min Hydrolysis H2SO4(8..5 mL /g) T = 45 C t = 60 min Pretreatmen t NaOH (1%) w/w alkaline solution T = 20 C t = 24 h FTIR and TGA analysis AFM and X-Ray analysis KOH 7.5% w/w T = 60 C t = 24 h Bleaching NaOH + H2O2+ DTPA + MgSO4 T = 70 C t = 150 min Acetylation HNO3(1/3) w/w Acetic Acid (1/20) w/w T= boiling t = 30 min Formic acid/water 90/10 v/v T = 130 C t = 90 min Ethanol/water 60/40 v/v T = 130 C t = 90 min Obtention Of Cellulose Nanofibers From Almond Shell Using Different Chemical Treatments. Eduardo Robles, I aki Urruzola, Rodrigo Llano-Ponte, Jalel Labidi
COST Action FP1105 October 8-9 Trabzon, Turkey Results Crystallinity Acetylated + Hydrolyzed + Homogenized Content Extracts Moisture Lignin Pulp (%) Method % % % (%) Almond shell 0.72 0.02 10.76 0.06 52.59 0.14 72.29 - Organosolv 5.28 0.02 30.55 0.06 43.21 0.06 75.73 80.57 NaOH 15% 3.28 0.02 19.03 0.06 42.76 0.06 69.35 76.95 KOH 7.5% 1.06 0.02 0.435 0.06 39.92 0.06 62.51 78.23 NaOH 7.5% 1.35 0.02 0.432 0.06 35.34 0.06 69.13 79.79 Formic acid 4.21 0.02 2.16 0.06 30.72 0.06 56.77 78.69 Obtention Of Cellulose Nanofibers From Almond Shell Using Different Chemical Treatments. Eduardo Robles, I aki Urruzola, Rodrigo Llano-Ponte, Jalel Labidi
COST Action FP1105 October 8-9 Trabzon, Turkey Results 3345 cm-1 OH stretching vibrations 2920 cm-1 CH3group stretching vibrations 2860 cm-1 CH2group stretching vibrations 1645 cm-1 absorbed water (bending) 1420 cm-1 CH2bending 1215 cm-1 OH in plane-bending cellulose 1150 cm1 C-O antisymetric bridge stretching FT-IR spectra of the a) Almond shell, b) Organosolv, c) NaOH 15%, d) KOH, e) NaOH 7.5%, f) Formic acid. 890 cm-1 -glycosidic linkages Obtention Of Cellulose Nanofibers From Almond Shell Using Different Chemical Treatments. Eduardo Robles, I aki Urruzola, Rodrigo Llano-Ponte, Jalel Labidi
COST Action FP1105 October 8-9 Trabzon, Turkey Conclusions Different lignin elimination methods were performed to determine their effectiveness in almond shell. Sodium hydroxide at 7.5% v/v and formic acid treatments were the best in eliminating lignin as the amount of lignin present in almond shell was reduced 17 and 22 % respectively. The different nature of the methods and their reactives influence in the properties of the final fiber, as change in crystallinity, lignin content compounds can be reached with these methods, then depending of the final use of the fiber, it can be chosen the most suitable method. Obtention Of Cellulose Nanofibers From Almond Shell Using Different Chemical Treatments. Eduardo Robles, I aki Urruzola, Rodrigo Llano-Ponte, Jalel Labidi and affinity to different
COST Action FP1105 October 8-9 Trabzon, Turkey THANK YOU! Author would also like to thank to CONACyT, Mexico for support provided through Scholarship 216178. Obtention Of Cellulose Nanofibers From Almond Shell Using Different Chemical Treatments. Eduardo Robles, I aki Urruzola, Rodrigo Llano-Ponte, Jalel Labidi
