WO2019076630A1 - An aerogel blanket and the household appliance using the same - Google Patents

An aerogel blanket and the household appliance using the same Download PDF

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Publication number
WO2019076630A1
WO2019076630A1 PCT/EP2018/076849 EP2018076849W WO2019076630A1 WO 2019076630 A1 WO2019076630 A1 WO 2019076630A1 EP 2018076849 W EP2018076849 W EP 2018076849W WO 2019076630 A1 WO2019076630 A1 WO 2019076630A1
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WIPO (PCT)
Prior art keywords
aerogel blanket
solution
production method
grain pulp
pulp
Prior art date
Application number
PCT/EP2018/076849
Other languages
French (fr)
Inventor
Orcun YUCEL
Nisa SIYIN
Yusuf YUSUFOGLU
Original Assignee
Arcelik Anonim Sirketi
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Publication date
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Publication of WO2019076630A1 publication Critical patent/WO2019076630A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/0091—Preparation of aerogels, e.g. xerogels
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C01B33/126—Preparation of silica of undetermined type
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
    • C01B33/145—Preparation of hydroorganosols, organosols or dispersions in an organic medium
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
    • C01B33/146—After-treatment of sols
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
    • C01B33/157—After-treatment of gels
    • C01B33/158—Purification; Drying; Dehydrating
    • C01B33/1585—Dehydration into aerogels
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/34—Elements and arrangements for heat storage or insulation
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/10—Solid density
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/32—Thermal properties

Definitions

  • the present invention relates to an aerogel blanket developed for use in household appliances operating in high temperatures.
  • the aim of the present invention is to produce an aerogel blanket comprising high aerogel based insulation material and a household appliance containing said aerogel blanket.
  • the aerogel blanket material production method realized to achieve the aim of the present invention and disclosed in the first claim and the dependent claims comprises the process steps of:
  • the aerogel blanket comprising sad aerogel blanket material is used as insulation material in household appliances operating in high temperatures, such as ovens and driers.
  • Figure 1 is a simple diagram of blanket production.
  • Figure 2 is a production diagram of the aerogel blanket material (of the aerogel).
  • the production method of the aerogel blanket material comprises the steps of,
  • the grain pulp is washed with pure water in order to refine it from dust and other impurities.
  • the purifying process is then realized by keeping it in sulfuric acid to minimize the amount of mineral content, and the pulp is dried in order to prepare it for burning.
  • Pulp is burnt to eliminate or minimize unwanted impurities.
  • the ashes are pulverized in order to obtain a homogeneous mixture when extracting silica from the ashes of the grain pulp.
  • the pulp ashes are filtered through a sieve of 100 ⁇ m.
  • the reason for boiling grain pulp with one of sodium hydroxide (NaOH), potassium hydroxide (KOH) and magnesium hydroxide (Mg(OH) 2 ) solutions is to obtain sodium silicate, potassium silicate or magnesium silicate by making use of ion exchange.
  • NaOH sodium hydroxide
  • KOH potassium hydroxide
  • Mg(OH) 2 magnesium hydroxide
  • the boiling process may be performed by continuous stirring and accompanied by a condenser, as well as in a microwave oven.
  • the filtration process is performed in order to separate the silicate solution from pulp ashes.
  • the obtained silicate solution is neutralized by sulfuric acid and gelling is obtained by the assistance of TEOS.
  • the gels are aged to complete hydrolysis and condensation reactions. The duration of aging affects the surface area, and the surface area affects the thermal insulation performance. Surface modification is performed by keeping the aged gels by adding silanizing agent/ethanol/n-hexane solution thereon.
  • the grain pulp are rice husk, wheat, sorghum or corn.
  • the purpose of using grain pulp in the invention is to obtain a low-cost silica solution from natural sources.
  • the drying process in the process steps no. (i) and (iii) is performed for a duration of almost 24 hours.
  • the sulfuric acid solution mentioned in the process steps no. (ii) and (viii), is 0.5-2 M.
  • the suitable molarity range for both purifying and gelling is 0.5-2 M.
  • the grain pulp is burned at a temperature range of 500-800°C.
  • the burning process is performed in this temperature range in order to refine the pulp from impurities as much as possible.
  • the gels are aged for 24 hours.
  • the optimal duration is determined as 24 hours in the invention.
  • the gels washed with pure water after the aging process are kept in vapor of boiling ethanol.
  • a solution selected from the group consisting of 0.5-2 M sodium hydroxide (NaOH), potassium hydroxide (KOH) or magnesium hydroxide (Mg(OH)2) solutions, preferably sodium hydroxide (NaOH) solution is added, in an amount 30-50 ml per 5 grams of grain pulp ashes.
  • the molar proportion of ethanol/silanizing agent is 1 and the molar proportion of n-hexane/silanizing agent is 21.85.
  • step no. (x) in the process step no. (x), 50 ml silanizing agent/ethanol/n-hexane is added on 50 gr gel and is kept for 24 hours at 25°C.
  • the silanizing agent is trimethylchlorosilane (TMCS), phenyltrimethoxysilane, or a mixture thereof.
  • the gels are dried in atmospheric pressure gradually for 12 hours at 25°C, for 2 hours at 80°C, and for 1 hour at 150°C.
  • Aerogel blanket material is produced by the production method of the invention.
  • the aerogel blanket material produced by the production method of the invention is used in producing aerogel blankets.
  • the aerogel blanket comprises liquid treated glass wool.
  • the aerogel blanket comprises glass wool treated with 0.001-1 M sulfuric acid.
  • liquid treated glass wool decreases the thermal conductivity coefficient of glass wool which is normally in the range of 35-40 mW/mK to the range of 30-35 mW/mK.
  • the density of the aerogel blanket of the invention is less than 120 kg/m 3 .
  • the heat capacity of the aerogel blanket of the invention is 0.8 kJ/kg.K or less.
  • the aerogel blanket has a sandwich structure obtained by applying the aerogel blanket material between glass wool blankets.
  • the aerogel blanket comprises aerogel material immersed in glass wool blankets during gelling.
  • the aerogel blanket comprises aerogel material inserted in between glass wool blankets during gelling.
  • the aerogel blanket of the invention is used as insulation material in household appliances.
  • the aerogel blanket of the invention is used as insulation material in ovens.
  • the aerogel blanket of the invention is used as insulation material in driers.
  • heating/cooling cycle durations are decreased particularly in ovens and driers.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Textile Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Silicon Compounds (AREA)

Abstract

The present invention relates to an aerogel blanket material developed for use in household appliances, an aerogel blanket comprising the aerogel blanket material, and a household appliance using said aerogel blanket.

Description

AN AEROGEL BLANKET AND THE HOUSEHOLD APPLIANCE USING THE SAME
The present invention relates to an aerogel blanket developed for use in household appliances operating in high temperatures.
Even though glass wool and rock wool based insulation materials used in the state of the art are resistant to high-temperatures and have low density values, their heat transmission coefficient in room conditions are 35 mW/mK and higher. Commercially available aerogel blanket products are disadvantageous despite their low thermal conductivity coefficients because the supercritical drying step in their production process leads to a high cost.
State of the art South Korean patent application no. KR101454233 (B1) discloses an aerogel blanket used for thermally insulating a pipe and a wall requiring thermal insulation, and a method and a device for producing said aerogel blanket in a continuous process.
State of the art U.S. patent application no. US 9073759 B2 discloses silica aerogels with a low thermal transmittance and a low dielectric coefficient, and a method of their production.
The aim of the present invention is to produce an aerogel blanket comprising high aerogel based insulation material and a household appliance containing said aerogel blanket.
The aerogel blanket material production method realized to achieve the aim of the present invention and disclosed in the first claim and the dependent claims comprises the process steps of:
(i) Washing grain pulp with pure water and drying at 100-140°C,
(ii) Purifying the dried grain pulp by keeping in a sulfuric acid (H2SO4) solution,
(iii) Then, straining the grain pulp, washing it with pure water and drying again at 100-140°C,
(iv) Burning the dried grain pulp,
(v) Pulverizing the burnt grain pulp,
(vi) Realizing the boiling process by adding a solution selected from the group consisting of sodium hydroxide (NaOH), potassium hydroxide (KOH) or magnesium hydroxide (Mg(OH)2) solutions, preferably sodium hydroxide (NaOH) solution to the grain pulp ashes,
(vii) Subjecting the grain pulp ash mixture to the filtration process,
(viii) Enabling gelling by adding sulfuric acid (H2SO4) solution and tetraethylortosilicate (TEOS) to the obtained silicate solution,
(ix) Aging the gels for almost 12-72 hours,
(x) Then keeping them by adding silanizing agent/ethanol/n-hexane solution on the gels, and
(xi) Gradually drying the gels in atmospheric pressure.
The aerogel blanket comprising sad aerogel blanket material is used as insulation material in household appliances operating in high temperatures, such as ovens and driers.
The production method of the aerogel blanket material realized to achieve the aim of the present invention is illustrated in the accompanying figures, wherein:
Figure 1: is a simple diagram of blanket production.
Figure 2: is a production diagram of the aerogel blanket material (of the aerogel).
In an embodiment of the invention, the production method of the aerogel blanket material comprises the steps of,
(i) Washing grain pulp with pure water and drying at 100-140°C,
(ii) Purifying the dried grain pulp by keeping in a sulfuric acid (H2SO4) solution,
(iii) Then, straining the grain pulp, washing it with pure water and drying again at 100-140°C,
(iv) Burning the dried grain pulp,
(v) Pulverizing the burnt grain pulp,
(vi) Realizing the boiling process by adding a solution selected from the group consisting of sodium hydroxide (NaOH), potassium hydroxide (KOH) or magnesium hydroxide (Mg(OH)2) solutions, preferably sodium hydroxide (NaOH) solution to the grain pulp ashes,
(vii) Subjecting the grain pulp ash mixture to the filtration process,
(viii) Enabling gelling by adding sulfuric acid (H2SO4) solution and tetraethylortosilicate (TEOS) to the obtained silicate solution,
(ix) Aging the gels for almost 12-72 hours,
(x) Then keeping them by adding silanizing agent/ethanol/n-hexane solution on the gels,
(xi) Gradually drying the gels in atmospheric pressure.
The grain pulp is washed with pure water in order to refine it from dust and other impurities. The purifying process is then realized by keeping it in sulfuric acid to minimize the amount of mineral content, and the pulp is dried in order to prepare it for burning.
Pulp is burnt to eliminate or minimize unwanted impurities.
The ashes are pulverized in order to obtain a homogeneous mixture when extracting silica from the ashes of the grain pulp. In the pulverizing process, the pulp ashes are filtered through a sieve of 100 µm.
The reason for boiling grain pulp with one of sodium hydroxide (NaOH), potassium hydroxide (KOH) and magnesium hydroxide (Mg(OH)2) solutions, is to obtain sodium silicate, potassium silicate or magnesium silicate by making use of ion exchange. In the invention, preferably sodium hydroxide is used since it is more inexpensive than the others. Here, the boiling process may be performed by continuous stirring and accompanied by a condenser, as well as in a microwave oven.
The filtration process is performed in order to separate the silicate solution from pulp ashes.
The obtained silicate solution is neutralized by sulfuric acid and gelling is obtained by the assistance of TEOS. The gels are aged to complete hydrolysis and condensation reactions. The duration of aging affects the surface area, and the surface area affects the thermal insulation performance. Surface modification is performed by keeping the aged gels by adding silanizing agent/ethanol/n-hexane solution thereon.
Gradual drying in atmospheric pressure decreases costs. Gradual performance of drying is for controlled drying of the produced aerogel blanket material.
In the preferred embodiment of the invention, the grain pulp are rice husk, wheat, sorghum or corn. The purpose of using grain pulp in the invention is to obtain a low-cost silica solution from natural sources.
In an embodiment of the invention, the drying process in the process steps no. (i) and (iii) is performed for a duration of almost 24 hours.
For drying, 24 hours is considered suitable as the optimal duration.
In an embodiment of the invention, the sulfuric acid solution mentioned in the process steps no. (ii) and (viii), is 0.5-2 M.
The suitable molarity range for both purifying and gelling is 0.5-2 M.
In the preferred embodiment of the invention, the grain pulp is burned at a temperature range of 500-800°C.
The burning process is performed in this temperature range in order to refine the pulp from impurities as much as possible.
In the preferred embodiment of the invention, the gels are aged for 24 hours.
The optimal duration is determined as 24 hours in the invention.
In an embodiment of the invention, the gels washed with pure water after the aging process, are kept in vapor of boiling ethanol.
In order to decrease the volume shrinkage occurring during drying, keeping in ethanol vapor is performed for substitution of water by ethanol.
In the preferred embodiment of the invention, in the process step no. (vi), a solution selected from the group consisting of 0.5-2 M sodium hydroxide (NaOH), potassium hydroxide (KOH) or magnesium hydroxide (Mg(OH)2) solutions, preferably sodium hydroxide (NaOH) solution is added, in an amount 30-50 ml per 5 grams of grain pulp ashes.
In an embodiment of the invention, the molar proportion of ethanol/silanizing agent is 1 and the molar proportion of n-hexane/silanizing agent is 21.85.
In an embodiment of the invention, in the process step no. (x), 50 ml silanizing agent/ethanol/n-hexane is added on 50 gr gel and is kept for 24 hours at 25°C.
In the preferred embodiment of the invention, the silanizing agent is trimethylchlorosilane (TMCS), phenyltrimethoxysilane, or a mixture thereof.
In an embodiment of the invention, in the process step no. (xi), the gels are dried in atmospheric pressure gradually for 12 hours at 25°C, for 2 hours at 80°C, and for 1 hour at 150°C.
Aerogel blanket material is produced by the production method of the invention.
The aerogel blanket material produced by the production method of the invention, is used in producing aerogel blankets.
In an embodiment of the invention, the aerogel blanket comprises liquid treated glass wool.
In the preferred embodiment of the invention, the aerogel blanket comprises glass wool treated with 0.001-1 M sulfuric acid.
Use of liquid treated glass wool decreases the thermal conductivity coefficient of glass wool which is normally in the range of 35-40 mW/mK to the range of 30-35 mW/mK.
The density of the aerogel blanket of the invention is less than 120 kg/m3.
The heat capacity of the aerogel blanket of the invention is 0.8 kJ/kg.K or less.
In an embodiment of the invention, the aerogel blanket has a sandwich structure obtained by applying the aerogel blanket material between glass wool blankets.
In an embodiment of the invention, the aerogel blanket comprises aerogel material immersed in glass wool blankets during gelling.
In an embodiment of the invention, the aerogel blanket comprises aerogel material inserted in between glass wool blankets during gelling.
By means of the aerogel blanket comprising the aerogel blanket material of the invention, 5-10% energy is saved in final oven prototypes. Using this energy conservation, ovens with larger internal volumes but with same physical sizes can be produced by thinning the present insulation thickness.
The aerogel blanket of the invention is used as insulation material in household appliances.
The aerogel blanket of the invention is used as insulation material in ovens.
The aerogel blanket of the invention is used as insulation material in driers.
Thanks to the aerogel blanket obtained by the invention, heating/cooling cycle durations are decreased particularly in ovens and driers.

Claims (15)

  1. A production method for producing aerogel blanket material, characterized by comprising the process steps of,
    (i) Washing grain pulp with pure water and drying at 100-140°C,
    (ii) Purifying the dried grain pulp by keeping in sulfuric acid (H2SO4) solution,
    (iii) Then, straining the grain pulp, washing it with pure water and drying again at 100-140°C,
    (iv) Burning the dried grain pulp,
    (v) Pulverizing the burnt grain pulp,
    (vi) Realizing the boiling process by adding a solution selected from the group consisting of sodium hydroxide (NaOH), potassium hydroxide (KOH) or magnesium hydroxide (Mg(OH)2) solutions, preferably sodium hydroxide (NaOH) solution to the grain pulp ashes,
    (vii) Subjecting the grain pulp ash mixture to the filtration process,
    (viii) Enabling gelling by adding sulfuric acid (H2SO4) solution and tetraethylortosilicate (TEOS) to the obtained silicate solution,
    (ix) Aging the gels for almost 12-72 hours,
    (x) Then keeping them by adding silanizing agent/ethanol/n-hexane solution on the gels, and
    (xi) Gradually drying the gels in atmospheric pressure.
  2. A production method according to claim 1, characterized by the grain pulp being rice husk, wheat, sorghum or corn.
  3. A production method according to claim 1 or claim 2, characterized by the drying process being performed for almost 24 hours in the process steps no. (i) and (iii).
  4. A production method according to any one of the claims 1 to 3, characterized by the sulfuric acid solution mentioned in the process steps no (ii) and (viii) being 0.5-2M.
  5. A production method according to any one of the preceding claims, characterized by the grain pulp being burned at 500-800°C.
  6. A production method according to any one of the preceding claims, characterized by the solution selected from the group consisting of 0.5-2 M sodium hydroxide (NaOH), potassium hydroxide (KOH) and magnesium hydroxide (Mg(OH)2) solutions, preferably sodium hydroxide (NaOH) solution being added in an amount 30-50 ml per 5 grams of grain pulp ashes in the process step no.(vi).
  7. A production method according to any one of the preceding claims, characterized by the molar proportion of ethanol/silanizing agent being 1 and the molar proportion of n-hexane/silanizing agent being 21.85.
  8. A production method according to any one of the preceding claims, characterized by the silanizing agent being trimethylchlorosilane (TMCS), phenyltrimethoxysilane, or a mixture thereof.
  9. An aerogel blanket material obtained by the production method according to claim 1.
  10. An aerogel blanket, characterized by comprising aerogel blanket material according to claim 9.
  11. An aerogel blanket according to claim 10, characterized by comprising liquid treated glass wool.
  12. An aerogel blanket according to claim 10 or claim 11, characterized by its density being less than 120 kg/m3.
  13. An aerogel blanket according to any one the claims 10 to 12, characterized by its heat capacity being 0.8 kJ/kg.K or less.
  14. A household appliance which is an oven characterized by comprising aerogel blanket according to any one of the claims 10 to 13.
  15. A household appliance which is a laundry drier characterized by comprising aerogel blanket according to any one of the claims 10 to 13.
PCT/EP2018/076849 2017-10-16 2018-10-02 An aerogel blanket and the household appliance using the same WO2019076630A1 (en)

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TRA2017/15854 2017-10-16
TR2017/15854A TR201715854A2 (en) 2017-10-16 2017-10-16 AN AEROJEL MATTRESS AND HOME APPLIANCE USED

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101244826A (en) * 2008-03-20 2008-08-20 绍兴纳诺气凝胶新材料研发中心有限公司 Method for producing silicon dioxide silica aerogel by drying in atmosphere pressure with rice hull as raw material
WO2014126490A1 (en) * 2013-02-15 2014-08-21 Instituto Superior Técnico Flexible hybrid aerogels prepared under subcritical conditions and their preparation process
KR101454233B1 (en) 2013-08-21 2014-10-23 주식회사 관평기술 Continuous manufacturing method and device for aerogel blanket, and the aerogel blanket
US9073759B2 (en) 2010-08-10 2015-07-07 Massachusetts Institute Of Technology Silica aerogels and their preparation
KR20170104914A (en) * 2016-03-08 2017-09-18 주식회사 엘지화학 Method for preparing aerogel blanket and aerogel blanket prepared by the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101244826A (en) * 2008-03-20 2008-08-20 绍兴纳诺气凝胶新材料研发中心有限公司 Method for producing silicon dioxide silica aerogel by drying in atmosphere pressure with rice hull as raw material
US9073759B2 (en) 2010-08-10 2015-07-07 Massachusetts Institute Of Technology Silica aerogels and their preparation
WO2014126490A1 (en) * 2013-02-15 2014-08-21 Instituto Superior Técnico Flexible hybrid aerogels prepared under subcritical conditions and their preparation process
KR101454233B1 (en) 2013-08-21 2014-10-23 주식회사 관평기술 Continuous manufacturing method and device for aerogel blanket, and the aerogel blanket
KR20170104914A (en) * 2016-03-08 2017-09-18 주식회사 엘지화학 Method for preparing aerogel blanket and aerogel blanket prepared by the same

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Title
AEROGELS ASPEN: "Article Information Sheet Regulation (EC) No 1907/2006 and 453/2010 (REACH) Section 1 Identification of the Substance/Preparation and of the Company/Undertaking. 1.1 Product Identifier Product Type: Spaceloft Synonyms: Spaceloft Gray silica aerogel material 1.2 Relevant Identified Uses of the Subs", 11 June 2015 (2015-06-11), XP055522804, Retrieved from the Internet <URL:https://www.aerogel.com/_resources/common/userfiles/file/SDS-AIS/Spaceloft_AIS_EU.pdf> [retrieved on 20181112] *
LIU SHI-WEI ET AL: "Hydrophobic silica aerogel derived from wheat husk ash by ambient pressure drying", JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, SPRINGER, NEW YORK, NY, US, vol. 78, no. 1, 22 December 2015 (2015-12-22), pages 60 - 67, XP035921306, ISSN: 0928-0707, [retrieved on 20151222], DOI: 10.1007/S10971-015-3928-5 *

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