Preparation of hemp nanocellulose and its use to improve the properties of paper for food packaging

Abstract

Nacional'nij tehnicnij universitet Ukraini Kiivs'kij politehnicnij institut imeni Igora Sikors'kogo https://orcid.org/0000-0002-7933-6038 Olha Yashchenko Kyiv Polytechnic Institute: Nacional'nij tehnicnij universitet Ukraini Kiivs'kij politehnicnij institut imeni Igora Sikors'kogo Olha Yakymenko Kyiv Polytechnic Institute: Nacional'nij tehnicnij universitet Ukraini Kiivs'kij politehnicnij institut imeni Igora Sikors'kogo Roman Zakharko Kyiv Polytechnic Institute: Nacional'nij tehnicnij universitet Ukraini Kiivs'kij politehnicnij institut imeni Igora Sikors'kogo

Comparative Characteristics of Hemp Nanocellulose Extracted by Different Methods

“…As a result of alkaline extraction and acetic boiling during 180 min of each treatment, the obtained OHP had a residual lignin content of 0.16% and an ash content of 0.08% and was used to obtain hemp nanocellulose. The obtained OHP has quality indicators close to those for organosolv pulps obtained earlier from other representatives of non-wood plant raw materials -wheat straw, flax, kenaf, miscanthus, reed [25][26][27] and has a lower residual lignin content than bleached coniferous cellulose, which was used to obtain nanocellulose in work [30] (lignin content 0.66%). NC, obtained by extraction of organosolv hemp pulp by different methods, had different values of yield from the mass of OHP.…”

“…The production of pulp from hemp fibers was carried out according to the method described in previous publication [25,26]. Briefly, the chopped hemp fibers were placed in a conical flask, where NaOH solution was added at a consumption of 5% of the raw material to remove most of the hemicelluloses and minerals and partially remove lignin from the plant material.…”

“…The values of the relevant technological parameters, which were used in this work to obtain nanocellulose from hemp organosolv pulp, were taken on the basis of previous experimental studies conducted by the authors [25][26][27] and literature data [9]. Preparation of NCs by acid hydrolysis (NCH) was carried out using sulfuric acid followed by ultrasound treatment according to the method described in detail in the article [26]. Briefly, the hydrolysis of OHP was performed with solutions of sulfuric acid with concentrations of 50% at a temperature of 60 o C, duration from 90 minutes using mechanical stirring.…”

Applications of Hemp Polymers and Extracts in Food, Textile and Packaging: A Review

“…The high-quality physical pulp properties and tensile strength make hemp an ideal non-wood-based raw material for making specialty paper. Barbash et al (2022) [ 57 ] developed hemp paper from fiber with density of up to 1.56 g/cm 3 , tensile strength of up to 66.7 MPa and transparency of up to 87.3%, while Cetin et al (2022) [ 58 ] developed Turkish hemp-based paper coated with PLA film to improve barrier properties. These researchers indicated that hot pressing improved interface adhesion between the two layers, improving barrier (by around 50%) and mechanical properties and thermal stability (no shrinkage of paper over 100 °C to 200 °C).…”

“…Major factors affecting packaging properties were particle size, foaming agent and adhesives [ 100 ]. Barbash et al (2022) [ 57 ] prepared nanocellulose from organosol (peracetic acid solution) hemp pulp (OHP) and found that addition of 2% hemp nanocellulose improved breaking force of the paper by 40% above the standard requirements for premium grade paper, while breaking length improved by 42%. These findings indicated that the use of hemp components effectively improved the properties of composite packaging materials as an alternative to conventional plastics.…”