3D printing of crude lignocellulosic biomass extracts containing hemicellulose and lignin

Gokce Bahcegul, E.
Bahcegul, Erinc
Özkan, Necati
© 2022 Elsevier B.V.Using lignocellulosic biomass, which is composed mainly of cellulose, hemicellulose and lignin, as a biopolymer resource in various polymeric material applications is an attractive option due to its abundance, biodegradability and renewability. Cellulose is the most popular member of the biopolymer trio for material applications, but despite constituting around half of a lignocellulosic biomass, attention hemicellulose and lignin receive is restricted in this sense, which gets even more limited when it comes to their utilization for 3D printing. A novel practical procedure is developed to address this issue, which enables the 3D printing of the alkaline soluble portion of corn cobs in its crude form, without any purification or modification and without using any auxiliary polymers or additives. The alkaline soluble phase forms a thermoreversible cold-setting gel upon the partial evaporation of its water content. The gel shows adequate flow at mild temperatures during printing while retaining the intended shape at room temperature once it's deposited on to the build platform. A printing temperature 45 °C together with a water content of 83 % are determined as the ideal parameters for 3D printing of the extracts. Following the 3D printing process, the models are immersed in an ethanol bath to permanently fix their shape.
Industrial Crops and Products


Three dimensional (3D) printing of bio-polymers from agricultural wastes
Bahçegül, Eylül Gökçe; Özkan, Necati; Şengönül, Cemal Merih; Department of Polymer Science and Technology (2022-8-8)
Lignocellulosic biomass, which is a composite structure made up of cellulose, hemicellulose and lignin biopolymers, is the most abundant biopolymer resource on earth. Among the biopolymers found in lignocellulosic agricultural wastes, hemicellulose and lignin receive significantly less attention compared to cellulose for material applications despite the fact that these two biopolymers constitute almost a half of a given biomass. In this context, three novel strategies were developed that render hemicellu...
3D Printing of Hemicellulosic Biopolymers Extracted from Lignocellulosic Agricultural Wastes
Bahcegul, E. Gokce; Bahcegul, Erinc; Özkan, Necati (2020-07-01)
Despite being one of the most abundant biopolymers found in nature after cellulose, hemicellulose is still an underutilized biopolymer. Using this abundant biopolymer in 3D printing applications has a lot of potential, but so far only minor attention has been given to hemicellulose, which includes using its derivative forms together with other polymers for 3D printing. On the other hand, cellulose, in the form of cellulose derivatives or nanocelluloses such as cellulose nanofibers and nanocrystals, receives...
Direct pyrolysis mass spectrometry analyses of polyamide-6 containing melamine and boron compounds
Isbasar, Ceyda; Bayramli, Erdal; Hacaloğlu, Jale (2013-08-01)
In this work, the thermal degradation characteristics of polyamide 6 (PA6) containing melamine (Me) and a boron-containing additive, borophosphate (BPO4), zinc borate (ZnB) or a boron and silicon-containing oligomer (BSi) are investigated systematically via direct pyrolysis mass spectrometry. In the presence of boron compounds, not only the release of melamine and its degradation products but also thermal characteristics of PA6 are affected significantly and the interactions between melamine and PA6 are enh...
Optimization of the fermentation parameters to maximize the production of cellulases and xylanases using DDGS as the main feedstock in stirred tank bioreactors
Iram, Attia; Çekmecelioğlu, Deniz; Demirci, Ali (2022-10-01)
© 2022 Elsevier LtdLignocellulolytic enzymes such as cellulase and xylanases are needed on the industrial scales for low-cost production of biofuels and the other value-added products from lignocellulosic biomass such as distillers' dried grains with solubles (DDGS). Optimization of fermentation variables such as agitation, aeration, and inoculum size for fungal enzyme production by submerged fermentation can enhance the enzyme production levels. Therefore, this research focused on the statistical optimizat...
Modeling and simulation of photobioreactors for biological hydrogen production
Androga, Dominic Deo; Eroğlu, İnci; Uyar, Başar; Department of Biotechnology (2014)
In applications of photofermentative hydrogen production, maintaining optimal temperature, feed composition, pH range and light intensity is the most critical objective for growth and proper functioning of the photosynthetic bacteria. Response Surface Methodology was applied to optimize temperature and light intensity for indoor hydrogen production using Rhodobacter capsulatus. Surface and contour plots of the regressions models developed revealed a maximum hydrogen production rate of 0.566 mol H2/m3/h at 2...
Citation Formats
E. Gokce Bahcegul, E. Bahcegul, and N. Özkan, “3D printing of crude lignocellulosic biomass extracts containing hemicellulose and lignin,” Industrial Crops and Products, vol. 186, pp. 0–0, 2022, Accessed: 00, 2022. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85132514601&origin=inward.