WO2026025201A1 - Panneau absorbant acoustique biofabriqué élaboré à base de mycélium et de résidus agricoles - Google Patents

Panneau absorbant acoustique biofabriqué élaboré à base de mycélium et de résidus agricoles

Info

Publication number
WO2026025201A1
WO2026025201A1 PCT/CL2024/050078 CL2024050078W WO2026025201A1 WO 2026025201 A1 WO2026025201 A1 WO 2026025201A1 CL 2024050078 W CL2024050078 W CL 2024050078W WO 2026025201 A1 WO2026025201 A1 WO 2026025201A1
Authority
WO
WIPO (PCT)
Prior art keywords
mycelium
panel
acoustic
materials
bio
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CL2024/050078
Other languages
English (en)
Spanish (es)
Inventor
Alberto Alejandro Gonzalez Ramos
Francia Camila DÍAZ GALAZ
Felipe Marcelo VÁSQUEZ GUTIÉRREZ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pontificia Universidad Catolica de Chile
Original Assignee
Pontificia Universidad Catolica de Chile
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pontificia Universidad Catolica de Chile filed Critical Pontificia Universidad Catolica de Chile
Priority to PCT/CL2024/050078 priority Critical patent/WO2026025201A1/fr
Publication of WO2026025201A1 publication Critical patent/WO2026025201A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N1/00—Microorganisms; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
    • C12N1/14—Fungi; Culture media therefor
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P1/00—Preparation of compounds or compositions, not provided for in groups C12P3/00 - C12P39/00, by using microorganisms or enzymes
    • C12P1/02—Preparation of compounds or compositions, not provided for in groups C12P3/00 - C12P39/00, by using microorganisms or enzymes by using fungi
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
    • E04C2/16—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of fibres, chips, vegetable stems, or the like

Definitions

  • the present invention in general terms, refers to a bio-fabricated, 100% biodegradable, compostable acoustic absorbent panel.
  • the panel is made from mycelium and agricultural stubble of corn and wheat straw, recovered from harvesting processes in Chile.
  • Bio-based materials have gained traction in recent decades due to both environmental and economic concerns. The increasing burden of pollution and waste has motivated the scientific and industrial communities to seek bio-based substitutes for fossil-based materials. in fossil fuels (Pandit et al., 2018). In the coming decades, bio-based materials are expected to complement and gradually replace some petroleum-based materials. Research efforts in this area have generated a significant level of technical and commercial success for bio-based materials. However, the widespread application of these materials is still challenged by technical limitations and higher economic costs associated with their production (Mekonnen et al., 2013).
  • bio-based materials have It emerged as an alternative to conventional materials by replacing these fuels with a source of renewable resources.
  • Bio-based materials are materials composed partially or entirely of raw materials of biological origin, or biomass (Waltz, 2008). Strictly following this definition, many common materials such as paper, wood, and leather fall into this category. Biomass is an essential part of the composition of these materials and is defined as any non-fossil organic matter available in a renewable way. This includes all biological organisms, living or dead, and their metabolic byproducts that have not been transformed by geological processes into substances such as coal or oil (Curran, 2010). Examples of biomass include forest residues, crops, agricultural stubble, fungi and bacteria, aquatic plants, and some municipal and industrial waste. Therefore, the development of these materials has the potential to reduce the carbon footprint and increase the efficiency of waste management, thereby reducing the economic and environmental pressure caused by conventional waste.
  • Bio-based materials are materials synthesized by living organisms such as plants, fungi, and bacteria. Therefore, the regeneration of the raw material source is guaranteed.
  • biomass production also depends on finite resources such as land and water, so there is still a need to expand innovation and technology to move towards a sustainable solution.
  • Material production must adapt to a variety of raw materials with less impact on land use, along with the use of renewable electricity in the production process, and integrate production so that they can manufacture multiple products from the available raw materials (Silva et al., 2021).
  • the fungal kingdom encompasses both unicellular and multicellular forms. Unicellular forms are known as yeasts. Multicellular fungi colonize substrates by means of chitinous filaments called hyphae. These hyphae can range in length from millimeters to centimeters. As they grow at their tips and branch, they form a three-dimensional network of hyphae (Blackwell, 2011). The structure and strength of the hyphae are provided by the chitin in their cell walls.
  • Chitin is a tough, inelastic, linear polymer linked by hydrogen bonds, which gives it rigidity along its chain. This linkage allows chitin to possess superior tensile strength, even greater than that of carbon fiber and steel (Appels & Wósten, 2021). Chitin is not only an important component of fungal cell walls but also the main constituent of the exoskeletons of crustaceans and insects. As such, it is the second most produced biopolymer in nature after cellulose (Appels & Wósten, 2021).
  • mycelium The network of hyphae is called mycelium. Mycelium is generally not visible because it grows below the surface, for example, in soil or in trunks, grow slowly and continuously as long as environmental and nutritional conditions are adequate.
  • the fungal mycelium is a complex network of fibrous cell chains called mycelium, microscopic in size and intertwined in a tube shape, which form the body part of the fungi.
  • the shape of the mycelium is due to the fact that fungi feed on dead organic matter, so they try to maximize their surface area in contact with their environment, which explains their dense and branched shape, which to better illustrate we can say resembles the blood capillaries that irrigate our body, or the roots of plants.
  • foam-type plastic materials such as polyurethane and expanded polystyrene, and synthetics such as fiberglass.
  • the process of manufacturing mycelium structures is based on creating an environment conducive to fungal proliferation within a substrate of sterilized organic matter.
  • the mycelium is inoculated into this substrate to grow until adequate colonization is achieved.
  • a dehydration drying treatment inactivates the mycelium by removing the water present in the material, inhibiting fungal growth and preventing contamination of the samples.
  • Controlled burning is a common practice for managing crop residues in Chile, considered an economical method that allows for the rapid elimination of large volumes of waste. For example, it is estimated that between 80% and 90% of the wheat residue area (150,000 ha) in Chile's two most productive regions is managed by burning. Burning also contributes 29% of the particulate matter present in these regions. Inhalation of this particulate matter can cause respiratory failure and asthma, while prolonged exposure can lead to [other health problems]. Cardiopulmonary problems and cancer. This practice is currently regulated through periods of prohibition in order to minimize its negative effects on the environment, health, and the risk of fire spread.
  • ES2497415A1 is a patent document that refers to a procedure for the growth of organic and biodegradable structures from agricultural waste and fungal mycelium, and their use as insulating components in construction, characterized by its design and manufacture of thermal and acoustic insulating structures, in accordance with a certain rigidity, 100% organic and biodegradable, using for this purpose agricultural waste (straw, wood chips, leaves, seed husks) and seeds of different species of fungi (Pleurotus ostreatus, Lentinula edodes, Ganoderma lucida m).
  • Patent document WO2022135757A1 discloses a flat insulating and/or construction element comprising a biologically produced composite material for thermal and/or acoustic insulation and/or for the installation of heating and/or supply systems.
  • the composite material comprises a particulate substrate.
  • the substrate surrounds and/or penetrates the mycelium of a fungus.
  • the composite material exhibits self-supporting and/or elastic plastic properties. This document does not address the use of starting materials such as corn and wheat residues.
  • Patent document CN103073224 discloses a method for preparing organic acoustic material involving (a) crushing material, where the material is wood chip generated during wood processing and/or agricultural production, (b) preparing culture material using crushed chip material and auxiliary materials, and disinfecting the culture material, (c) inoculating an edible mushroom strain into the culture material, (d) performing the cultivation, and (e) drying the product.
  • the method is useful for preparing organic acoustic material for construction and packaging.
  • Patent document BR102022009786 discloses a process for the production of fungal biocomposites using lignocellulosic waste and byproducts, fungal biocomposites, and the use of said biocomposites for the production of civil engineering articles, soundproofing, and other applications. This document does not disclose that the material used is mycelium-based or that corn stover and straw are used.
  • the proposed solution to this problem is a bio-fabricated acoustic absorbent panel, a low-density foam-type agglomerate, distinguished by its composition of plant fibers derived from corn stubble and wheat straw, and the use of mycelium as a biological binder.
  • the panel described in this application possesses fire-retardant, thermal insulation, hydrophobic, and antistatic properties. It is designed for the acoustic conditioning of interior spaces such as bedrooms, offices, cinemas, theaters, museums, and others.
  • Fungal mycelium allows for the development of materials with a renewable production cycle through the reuse of a wide variety of lignocellulosic waste generated by agricultural and forestry activities.
  • its use in manufacturing acoustic absorption panels offers a competitive alternative with a lower environmental impact than currently available options on the market.
  • the goal is to create an alternative that allows the development of new materials with a sustainable production system through the reuse of lignocellulosic waste, thus reducing dependence on the use of materials based on fossil fuels.
  • the panel of the present invention was subjected to laboratory tests with ISO 10534-2 certification demonstrating its good acoustic absorption performance in a relevant environment.
  • the panel production process does not require highly complex technology, as it uses low temperature equipment ( ⁇ 150 °C), in relation to the production of other materials.
  • the panel has fireproof and thermal insulation properties and is designed for acoustic conditioning of interior spaces.
  • a bio-fabricated, biodegradable, and compostable acoustic absorption panel is presented. Unlike the main alternatives currently on the market, it decomposes at the end of its useful life. It is made from mycelium and plant fibers derived from agricultural stubble of corn and wheat straw, recovered from harvesting processes in Chile.
  • Figure 1a Simple scheme of the panel biofabrication process based on mycelium and agricultural stubble.
  • Figure 1 b Complete scheme of the panel biofabrication process based on mycelium and agricultural stubble.
  • FIG. 1 Sample of the biomaterial made from mycelium and agricultural stubble.
  • the microstructure and material composition of corn stover exhibit a tendency towards water permeability.
  • the cob for example, can absorb up to 300% of its weight in water, expanding between 10% and 20%, increasing in size with moisture and decreasing in size when dehydrated. This phenomenon allows reducing the vacuum or suction effect created when manufacturing composite materials with mycelium in molds, facilitating their demolding.
  • Substrate of vegetable fibers that corresponds to 30% to 60% w/w wheat straw and 40% to 70% w/w corn stubble (stem, leaves, cob), based on the weight of the substrate.
  • the above material is described, such that the cereal with which the spawn is made is a cereal that can be chosen from: wheat, corn, barley, canary seed, brown rice, millet.
  • the above material is described such that the mycelium is obtained from fungal species.
  • the above material is described, such that the fungal species is selected from among Pleurotus ostreatus, Ganoderma lucidum, Trametes versicolor, Lentinula edodes, saprotrophic fungi belonging to the Phylum basidiomycota, or other species of the white decomposition type.
  • the use of the material is described as being used to make a bio-fabricated acoustic absorber.
  • the previous use is described, such that the acoustic absorber is panel-shaped.
  • the above use is described because it serves for the construction of walls, acoustic rooms, partitions, and roofs.
  • the above use is described such that the panel is 100% biodegradable and compostable.
  • the corncob stood out in the demolding process, since the critical areas (corners and edges of the corners) that presented the greatest difficulty to demold, managed to come out in one piece, without breaking, without showing areas adhered to the mold, in less time and without the need to apply any additional technique such as making holes in the mold to facilitate the entry of air or breaking it to achieve the exit of the panel, as was the case with the other substrates.
  • corn cob samples shrank to 15% of their original size. This property allows the panel to detach naturally from the plastic without forcing the mold. Additionally, it has been determined that this property can be regulated by the percentage of water initially added.
  • corncob substrate offered beneficial properties for panel production, it exhibited deficiencies in its mechanical strength. Once demolded, the panel was weak, fracturing and crumbling during handling. In contrast, straw was the substrate with outstanding mechanical strength, as the panel did not fracture and did not require delicate handling. However, this substrate also presented difficulties in demolding. Therefore, after evaluating the properties of both potential substrates, it was concluded that the combination of Both (Wheat Straw + Corn Stalks) would be ideal to achieve a composite material that is highly resistant, given by the long fiber of the wheat straw and, following the same logic, adds corn stalks, such as the stem, to enclose the granulation of the corn cob, and which, on the other hand, will present excellent demolding thanks to the properties of the latter.
  • the substrates studied being plant fibers, have a microstructure with walls that store air and can contribute to obtaining a low-density material, which makes these materials ideal for acoustic applications.
  • the panel described in this application has fewer negative environmental externalities. It is estimated that MCMs can achieve a negative carbon footprint (-39.5 kg CO2eq m3 ) and, therefore, considerably lower compared to the production of other currently marketed materials such as EPS, PUR, or mineral wool, which range from 42 to 172 kg CO2eq m3 . This is due to the CO2 absorbed by cereal crops during their growth, which is then used as raw material for the product. It also minimizes waste management and pollution problems at the end of its useful life, as this product is completely biodegradable.
  • the bio-fabricated, biodegradable and compostable acoustic absorbent panel made from the mycelium of fungal species has a high acoustic absorption performance, since the acoustic absorption coefficient tested and shown in Figure 3 represented a good result and performance for an acoustic material, even superior to the low-frequency performance of some materials that are currently marketed for this function.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Architecture (AREA)
  • Zoology (AREA)
  • Biotechnology (AREA)
  • Mycology (AREA)
  • Physics & Mathematics (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Genetics & Genomics (AREA)
  • Acoustics & Sound (AREA)
  • Microbiology (AREA)
  • Structural Engineering (AREA)
  • Biochemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Civil Engineering (AREA)
  • Tropical Medicine & Parasitology (AREA)
  • Medicinal Chemistry (AREA)
  • Botany (AREA)
  • Electromagnetism (AREA)
  • Virology (AREA)
  • Biomedical Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mushroom Cultivation (AREA)

Abstract

La présente invention concerne un panneau absorbant acoustique biofabriqué, 100% biodégradable, compostable, avec un temps de décomposition réduit à la fin de sa vie utile. Il est fabriqué à partir de mycélium et de résidus agricoles de mais et de paille de blé, récupérés des processus de récolte au Chili.
PCT/CL2024/050078 2024-07-31 2024-07-31 Panneau absorbant acoustique biofabriqué élaboré à base de mycélium et de résidus agricoles Pending WO2026025201A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CL2024/050078 WO2026025201A1 (fr) 2024-07-31 2024-07-31 Panneau absorbant acoustique biofabriqué élaboré à base de mycélium et de résidus agricoles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CL2024/050078 WO2026025201A1 (fr) 2024-07-31 2024-07-31 Panneau absorbant acoustique biofabriqué élaboré à base de mycélium et de résidus agricoles

Publications (1)

Publication Number Publication Date
WO2026025201A1 true WO2026025201A1 (fr) 2026-02-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CL2024/050078 Pending WO2026025201A1 (fr) 2024-07-31 2024-07-31 Panneau absorbant acoustique biofabriqué élaboré à base de mycélium et de résidus agricoles

Country Status (1)

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WO (1) WO2026025201A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103073224A (zh) * 2012-12-13 2013-05-01 北京市劳动保护科学研究所 一种有机声学材料的制备方法和制备得到的材料
ES2497415A1 (es) * 2013-03-21 2014-09-22 Universidad De Sevilla Procedimiento para el crecimiento de estructuras orgánicas y biodegradables a partir de residuo agrícola y micelio de hongo, y su uso como componentes aislantes en construcción
CN108934760A (zh) * 2018-07-11 2018-12-07 鲁东大学 一种利用裂褶菌菌丝体制备可降解包装材料的方法
WO2023220796A1 (fr) * 2022-05-19 2023-11-23 Fungi Biotecnologia Ltda Procédé de production de biocomposites fongiques utilisant des déchets et des sous-produits lignocellulosiques, biocomposites fongiques, utilisation desdits biocomposites pour produire des articles de construction civile et d'acoustique, des emballages et analogues

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103073224A (zh) * 2012-12-13 2013-05-01 北京市劳动保护科学研究所 一种有机声学材料的制备方法和制备得到的材料
ES2497415A1 (es) * 2013-03-21 2014-09-22 Universidad De Sevilla Procedimiento para el crecimiento de estructuras orgánicas y biodegradables a partir de residuo agrícola y micelio de hongo, y su uso como componentes aislantes en construcción
CN108934760A (zh) * 2018-07-11 2018-12-07 鲁东大学 一种利用裂褶菌菌丝体制备可降解包装材料的方法
WO2023220796A1 (fr) * 2022-05-19 2023-11-23 Fungi Biotecnologia Ltda Procédé de production de biocomposites fongiques utilisant des déchets et des sous-produits lignocellulosiques, biocomposites fongiques, utilisation desdits biocomposites pour produire des articles de construction civile et d'acoustique, des emballages et analogues

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