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New luminescent wood film is eco-friendly


The research is an important step in utilizing natural wood for the development of functional wood materialsIngo Burgert

Researchers at ETH Zürich and Scion in New Zealand have developed a bio-based, luminescent, water-resistant wood film that could lead to a range of uses in interior design, such as lighting systems and laminated cover panels, as well as in photonics and laser devices. The proposed luminescent wood is eco-friendly and made from renewable materials that could replace less environmentally friendly plastic-based products in optical lighting.

With growing interest in renewable materials and wood-based films for optical applications, many such materials are not sufficiently water resistant, exhibit poor mechanical properties, and require a petroleum-based polymer matrix. The team had initially explored making transparent wood materials, as this was more environmental friendly and did not depend on a polymer-matrix. Although this had been achieved in another study, the resulting transparent wood films were sensitive to moisture and possessed anisotropic light scattering. This pushed them to develop luminescent thin wood films with a hydrophobic coating and achieve isotropic light scattering for optical applications.

As reported in ACS Nano [Fu et al. ACS Nano (2020) DOI: 10.1021/acsnano.0c06110], balsa wood was treated with a solution that removed lignin and around half of its hemicelluloses, so that only a porous scaffold remained. The team then infused the delignified wood with a solution that contained quantum dots, semiconductor nanoparticles that glow in a specific color when bombarded with ultraviolet light. After compressing and drying, an hydrophobic coating was applied to produce a thick, water-resistant wood film with useful mechanical properties.

The resulting luminescent panel was tested by lighting up the inside of a toy house. Under UV light, the quantum dots in the wood emitted and scattered an orange light that distributed evenly across the surface of the film. On being exposed to UV light on the outside, a wood panel lights up an indoor space while a non-luminescent panel did not.

As lead author Ingo Burgert told Materials Today, “The luminescent transparent wood film combines an anisotropic structure and mechanical performance with an almost uniform luminescence due to isotropic light scattering”. In addition to the modification of the wood structure to allow an anisotropic cellulose scaffold with a hierarchical structure, different types of luminescent quantum dots could be embedded into the wood film to provide various colors of lighting products.

Burgert added “The research is an important step in utilizing natural wood for the development of functional wood materials”. The team now hope to work on producing the luminescent wood materials in an even more environmental friendly way.

Luminescent thin wood films with a hydrophobic coating
Luminescent thin wood films with a hydrophobic coating
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“The research is an important step in utilizing natural wood for the development of functional wood materials”Ingo Burgert

Researchers at ETH Zürich and Scion in New Zealand have developed a bio-based, luminescent, water-resistant wood film that could lead to a range of uses in interior design, such as lighting systems and laminated cover panels, as well as in photonics and laser devices. The proposed luminescent wood is eco-friendly and made from renewable materials that could replace less environmentally friendly plastic-based products in optical lighting.

With growing interest in renewable materials and wood-based films for optical applications, many such materials are not sufficiently water resistant, exhibit poor mechanical properties, and require a petroleum-based polymer matrix. The team had initially explored making transparent wood materials, as this was more environmental friendly and did not depend on a polymer-matrix. Although this had been achieved in another study, the resulting transparent wood films were sensitive to moisture and possessed anisotropic light scattering. This pushed them to develop luminescent thin wood films with a hydrophobic coating and achieve isotropic light scattering for optical applications.

As reported in ACS Nano [Fu et al. ACS Nano (2020) DOI: 10.1021/acsnano.0c06110], balsa wood was treated with a solution that removed lignin and around half of its hemicelluloses, so that only a porous scaffold remained. The team then infused the delignified wood with a solution that contained quantum dots, semiconductor nanoparticles that glow in a specific color when bombarded with ultraviolet light. After compressing and drying, an hydrophobic coating was applied to produce a thick, water-resistant wood film with useful mechanical properties.

The resulting luminescent panel was tested by lighting up the inside of a toy house. Under UV light, the quantum dots in the wood emitted and scattered an orange light that distributed evenly across the surface of the film. On being exposed to UV light on the outside, a wood panel lights up an indoor space while a non-luminescent panel did not.

As lead author Ingo Burgert told Materials Today, “The luminescent transparent wood film combines an anisotropic structure and mechanical performance with an almost uniform luminescence due to isotropic light scattering”. In addition to the modification of the wood structure to allow an anisotropic cellulose scaffold with a hierarchical structure, different types of luminescent quantum dots could be embedded into the wood film to provide various colors of lighting products.

Burgert added “The research is an important step in utilizing natural wood for the development of functional wood materials”. The team now hope to work on producing the luminescent wood materials in an even more environmental friendly way.

Luminescent thin wood films with a hydrophobic coating
Luminescent thin wood films with a hydrophobic coating

Source: https://www.materialstoday.com/biomaterials/news/new-luminescent-wood-film-is-ecofriendly/

Metal

Week in Review: Steel prices; US electricity consumption; rising aluminum premiums

Before we head into the weekend, let’s take a look back at the week that was and the metals storylines here on MetalMiner, including coverage of steel prices, US electricity consumption and…

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Before we head into the weekend, let’s take a look back at the week that was and the metals storylines here on MetalMiner, including coverage of steel prices, US electricity consumption and much more:

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Week of April 12-16 (steel prices, electricity consumption and more)

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Metal

US flat rolled steel prices still strong, firm prices expected into Q2

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Information Provided By:

SteelOrbis Elektronik Pazaryeri A.Ş. (“SteelOrbis”)
19 Mayıs Mahallesi, Atatürk Caddesi
Şeref Yazgan İş Merkezi, No: 72, Kat: 7, D: 18
Kozyatağı – 34736
Istanbul, Turkey

Trade Registration Number : 541892
MERSİS Number : 0470048178400014
Customer Relations Officer : Sinem Alpkaya
Tel : +90 216 468 10 50
Fax : +90 216 386 41 08

This Information Form has been drawn up in order to provide information to the customer (“Customer”) who seeks a free trial on an electronic environment for the purpose of benefiting from the services offered by the SteelOrbis website at “www.steelorbis.com” prior to acceptance of the Membership Contract, and it allows the Customer to gain clear information on the terms and conditions of the membership to be established as well as to review the text of the Contract in question.

The following successive steps shall be taken in order to establish a free trial:

– The Customer selects the “Free Trial” option on the home page at https://www.steelorbis.com.
– The Customer provides all information requested in the “Free Trial Application” form displayed on the screen and confirms it.
– SteelOrbis sends an account activation e-mail to the e-mail address of the Customer provided in the application form.
– The Customer clicks on the activation link sent to his/her e-mail address and activates his/her account. The website Membership Contract is presented to the Customer during the account activation process.

Storage of the Membership Contract:

You can either save the Membership Contract on your computer or make print-outs of it for storage. The Membership Contract accepted and confirmed by the Customer is not kept by SteelOrbis. You can always get access to the standard Membership Contract displayed on the website. However, as amendments may be made to the standard Contract, it may include some variations in comparison with the text approved by you. Accordingly, it may not be possible for you to access on the website the text you originally approved.

Data entry errors:

The information you should provide for membership application and the fields you should fill in are indicated during each step of the operation. You are obliged to provide such information. If you leave the required fields blank, the system will issue a warning. Please fill in all necessary fields. Prior to the completion of the operation, all data entered by you in the previous step will be displayed once more. Please make sure that the information provided by you is accurate and complete before finally confirming the operation; any missing or incorrect information should be completed or corrected. Any amendment or correction on the information provided by you after the confirmation may be performed by means of website logins after the establishment of the membership.

Our confidentiality policy:

Please click here to review our confidentiality policy.

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Source: https://www.steelorbis.com/steel-prices/steel-prices-market-analyses/flats-and-slab/us-flat-rolled-steel-prices-still-strong-firm-prices-expected-into-q2-1195826.htm

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Metal

US flat rolled steel prices still strong, firm prices expected into Q2

Republished by Plato

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Information Provided By:

SteelOrbis Elektronik Pazaryeri A.Ş. (“SteelOrbis”)
19 Mayıs Mahallesi, Atatürk Caddesi
Şeref Yazgan İş Merkezi, No: 72, Kat: 7, D: 18
Kozyatağı – 34736
Istanbul, Turkey

Trade Registration Number : 541892
MERSİS Number : 0470048178400014
Customer Relations Officer : Sinem Alpkaya
Tel : +90 216 468 10 50
Fax : +90 216 386 41 08

This Information Form has been drawn up in order to provide information to the customer (“Customer”) who seeks a free trial on an electronic environment for the purpose of benefiting from the services offered by the SteelOrbis website at “www.steelorbis.com” prior to acceptance of the Membership Contract, and it allows the Customer to gain clear information on the terms and conditions of the membership to be established as well as to review the text of the Contract in question.

The following successive steps shall be taken in order to establish a free trial:

– The Customer selects the “Free Trial” option on the home page at https://www.steelorbis.com.
– The Customer provides all information requested in the “Free Trial Application” form displayed on the screen and confirms it.
– SteelOrbis sends an account activation e-mail to the e-mail address of the Customer provided in the application form.
– The Customer clicks on the activation link sent to his/her e-mail address and activates his/her account. The website Membership Contract is presented to the Customer during the account activation process.

Storage of the Membership Contract:

You can either save the Membership Contract on your computer or make print-outs of it for storage. The Membership Contract accepted and confirmed by the Customer is not kept by SteelOrbis. You can always get access to the standard Membership Contract displayed on the website. However, as amendments may be made to the standard Contract, it may include some variations in comparison with the text approved by you. Accordingly, it may not be possible for you to access on the website the text you originally approved.

Data entry errors:

The information you should provide for membership application and the fields you should fill in are indicated during each step of the operation. You are obliged to provide such information. If you leave the required fields blank, the system will issue a warning. Please fill in all necessary fields. Prior to the completion of the operation, all data entered by you in the previous step will be displayed once more. Please make sure that the information provided by you is accurate and complete before finally confirming the operation; any missing or incorrect information should be completed or corrected. Any amendment or correction on the information provided by you after the confirmation may be performed by means of website logins after the establishment of the membership.

Our confidentiality policy:

Please click here to review our confidentiality policy.

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Source: https://www.steelorbis.com/steel-prices/steel-prices-market-analyses/flats-and-slab/us-flat-rolled-steel-prices-still-strong-firm-prices-expected-into-q2-1195826.htm

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