Search

BR-102024017494-A2 - PROCESS FOR OBTAINING NANOCELLULOSE FROM MALT BAGASSE

BR102024017494A2BR 102024017494 A2BR102024017494 A2BR 102024017494A2BR-102024017494-A2

Abstract

This Invention Patent (PI) refers to a process for obtaining nanocellulose extracted from malt bagasse, a residue from the brewing industry. This sustainable method not only reduces the disposal of this biomass, but also takes advantage of the unique properties of nanocellulose to create environmentally friendly packaging. Through mechanical and chemical processes, nanocellulose is extracted from malt bagasse on a nanometric scale. These fibers are known for their high strength and biocompatibility, making them ideal for packaging manufacturing. Therefore, the invention constitutes a sustainable alternative for the packaging sector, and can be used in the pharmaceutical, cosmetic and food industries.

Inventors

  • GABRIELA PEREIRA BARROS
  • Adriana De Jesus Santos
  • RANYERE LUCENA DE SOUZA
  • CLEIDE MARA FARIA SOARES
  • JOÃO PEDRO BEZERRA GONZAGA
  • COCHIRAN PEREIRA DOS SANTOS

Assignees

  • INSTITUTO DE TECNOLOGIA E PESQUISA
  • UNIVERSIDADE TIRADENTES

Dates

Publication Date
20260310
Application Date
20240826

Claims (6)

  1. 1. PROCESS FOR OBTAINING NANOCELLULOSE FROM MALT BAGASSE, characterized by comprising the following steps: I. Drying and grinding the malt bagasse; II. Mixing the pre-treated malt bagasse with a sodium bicarbonate solution for 96 h, under mechanical agitation for 20 min at 30 °C every 24 h; III. Cavitating the solution using ultrasound for 5 minutes; IV. Filtering and washing the bagasse in distilled water and drying in a circulating air oven at a temperature of 60 °C for 24 hours; V. Obtaining nanocellulose.
  2. 2. PROCESS, according to claim 1, characterized by drying brewery malt bagasse in the sun for 3 days, then, after removing the water present in the residue, the malt bagasse was crushed in a mechanical crusher three times for 5 minutes and sieved to a particle size of 100 mesh.
  3. 3. PROCESS, according to claim 1, characterized by mixing 10 g of pre-treated dry malt bagasse with a 10% sodium bicarbonate solution (10 g of bicarbonate + 100 mL of distilled water) for 96 h, under mechanical stirring for 20 min, at a temperature of 30 °C every 24 h.
  4. 4. PROCESS, according to claim 1, characterized by inserting the solution into an ultrasound device for the cavitation process of cellulose nanoparticles.
  5. 5. PROCESS, according to claim 1, characterized in that after removing the solution, the bagasse was filtered and washed in distilled water and dried in a circulating air oven at a temperature of 60 °C for 8 hours, then the remaining fibers are passed through a portable mechanical crusher and a fine mesh sieve with a particle size of 150 mesh.
  6. 6. Nanocellulose, according to claim 1, characterized by obtaining barrier properties in packaging, and can be used in the production of packaging, vehicle components, batteries, in the cosmetics industry, in construction and in the food industry.

Description

FIELD OF THE INVENTION 001. This Invention Patent (PI) refers to a process for obtaining nanocellulose extracted from malt bagasse, a residue from the brewing industry. This sustainable method not only reduces the disposal of this biomass, but also takes advantage of the unique properties of nanocellulose to create environmentally friendly packaging. Through mechanical and chemical processes, nanocellulose is extracted from malt bagasse on a nanometric scale. These fibers are known for their high strength and biocompatibility, making them ideal for packaging manufacturing. Therefore, the invention constitutes a sustainable alternative for the packaging sector and can be used in the pharmaceutical, cosmetic, and food industries. FUNDAMENTALS OF THE TECHNIQUE 002. Brewer's Spent Grain (BSG) is underutilized, being primarily used for animal feed due to its large production volume in the brewing industry. However, BSG is rich in cellulose and non-cellulosic polysaccharides, offering significant potential for other applications. Through sustainable approaches, BSG can be processed to recover its main components, transforming it into high value-added products, thus expanding its possibilities of use beyond animal nutrition (Moran-Aguilar, M. G.; Costa-Trigo, I.; Calderón-Santoyo, M.; Domínguez, J. M.; Aguilar-Uscanga, M. G. Production of cellulases and xylanases in solid-state fermentation by different strains of Aspergillus niger using sugarcane bagasse and spent brewery grains. Revista de Engenharia Bioquímica, v. 172, p. 108060. 2021). 003. Nanocellulose is a nanomaterial that has recently gained prominence due to its superior properties and performance compared to conventional cellulose fibers. Furthermore, it is frequently linked to sustainability, as it can be produced from renewable sources (Klemm D.; Kramer F.; Moritz S.; Lindstrom T.; Ankerfors M.; Gray D.; Dorris, A. Nanocelluloses: a new family of nature-based materials. Angewandte Chemie International Edition, v. 50, n. 24, p. 5438-5466, 2011). 004. Nanocellulose obtained from malt bagasse can be used in a variety of applications due to its attractive properties. It can be incorporated into composites to improve strength and durability, into films and coatings due to its transparency and flexibility, and into biomedical products due to its biocompatibility. Furthermore, the use of malt bagasse as a raw material contributes to sustainability, as it utilizes a byproduct of the brewing industry that would otherwise be discarded. Transforming this residue into nanocellulose adds value to the malt bagasse and reduces the environmental impact associated with its disposal. STATE OF THE ART 005. To substantiate the innovative nature of this proposal, a prior art search related to obtaining nanocellulose from malt bagasse was conducted. The search encompassed the patent databases of the National Institute of Industrial Property (INPI), the European patent database (Espacenet), and the United States Patent and Trademark Office (USPTO). In addition, the scientific publication databases ScienceDirect, SciELO, and Google Scholar on the subject were consulted. The most relevant documents found in these databases present significant differences in relation to the present proposal, as described below: 006. Document BR 112017022596-4 deals with methods, including the steps of providing a cellulosic biomass, associating the cellulosic biomass with an organic liquid to form a mixture, treating the mixture to reduce its moisture content to 30% or less (if necessary), and processing the mixture to produce cellulose nanofibrils in a fluid paste. In some embodiments, the methods provided take into account the production of fluid pastes with a high solids content containing 4% or more cellulosic nanofibrils. Furthermore, the present patent differs, in terms of process temperature and time, as well as degradation in a short period (7 days), when compared to other materials. 007. The document PRODUCTION OF NANOCELLULOSE FROM SUGARCANE BAGASSE AND DEVELOPMENT OF NANOCELLULOSE CONJUGATED WITH POLYLYSINE FOR FUMONISIN B1 TOXICITY ABSORPTION (DOI: https://doi.org/10.3390/polym16131881) presents a study that aimed to extract nanocellulose (NC) from sugarcane bagasse agricultural waste using a chemical method (sulfuric acid hydrolysis and ultrasonication). Subsequently, the nanocellulose product was conjugated with polylysine (NC-PL) and evaluated for its effectiveness in reducing the toxicity of fumonisin B1 (FB1), a mycotoxin produced by fungi commonly found in corn, wheat, and other grains. However, the present patent differs in the production process and the use of different raw materials. 008. The document EXTRACTION OF NANOCELLULOSE FROM THE RESIDUE OF SUGARCANE BAGASSE FIBER FOR ANTI-STAPHYLOCOCCUS AUREUS (S. aureus) APPLICATION (DOI: https://doi.org/10.3390/polym16111612) refers to the extraction of nanocellulose from bagasse fiber remaining from sugarcane production by alka