<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>1347</id>
    <completedYear>2020</completedYear>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>2085</pageFirst>
    <pageLast>2099</pageLast>
    <pageNumber/>
    <edition/>
    <issue>9</issue>
    <volume>10</volume>
    <type>article</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Novel UV-transparent 2-component polyurethane resin for chip-on-board LED micro lenses</title>
    <abstract language="eng">In this work we present a novel optical polymer system based on polyurethane elastomer components, which combines excellent UV transparency with high thermal stability, good hardness, high surface tension and long pot life. The material looks very promising for encapsulation and microlensing applications for chip-on-board (CoB) light-emitting diodes (LED). The extinction coefficient k, refractive index n, and bandgap parameters were derived from transmission and reflection measurements in a wavelength range of 200-890 nm. Thermogravimetry and differential scanning calorimetry were used to provide glass transition and degradation temperatures. The surface tension was determined by means of contact angle measurements. As proof of concept, a commercial InGaN-CoB-LED is used to demonstrate the suitability of the new material for the production of microlenses.</abstract>
    <parentTitle language="eng">Optical Materials Express</parentTitle>
    <identifier type="issn">2159-3930</identifier>
    <identifier type="urn">urn:nbn:de:kobv:526-opus4-13472</identifier>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="CopyrightInfo">© 2020 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.</enrichment>
    <enrichment key="DOI_VoR">https://doi.org/10.1364/OME.393844</enrichment>
    <licence>OSA Open Access Publishing Agreement</licence>
    <author>Joachim Bauer</author>
    <author>Marko Gutke</author>
    <author>Friedhelm Heinrich</author>
    <author>Matthias Edling</author>
    <author>Vesela Stoycheva</author>
    <author>Alexander Kaltenbach</author>
    <author>Martin Burkhardt</author>
    <author>Martin Gruenefeld</author>
    <author>Matthias Gamp</author>
    <author>Christoph Gerhard</author>
    <author>Patrick Steglich</author>
    <author>Sebastian Steffen</author>
    <author>Michael Herzog</author>
    <author>Christian Dreyer</author>
    <author>Sigurd Schrader</author>
    <collection role="ddc" number="621">Angewandte Physik</collection>
    <collection role="institutes" number="">Fachbereich Ingenieur- und Naturwissenschaften</collection>
    <collection role="open_access" number="">open_access</collection>
    <collection role="Funding" number="">DFG-geförderter Publikationsfonds</collection>
    <collection role="green_open_access" number="1">Gold Open Access</collection>
    <thesisPublisher>Technische Hochschule Wildau</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-th-wildau/files/1347/ome-10-9-2085.pdf</file>
  </doc>
  <doc>
    <id>337</id>
    <completedYear>2014</completedYear>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst>77</pageFirst>
    <pageLast>84</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>18</volume>
    <type>articlewildau</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>2014-10-16</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Bestimmung der Kohäsionsenergie- und Vernetzungsdichte von Polymeren mit Hilfe von Quellungsmessungen</title>
    <abstract language="deu">Bei der Abschätzung der Beständigkeit von Kunststoffen gegenüber niedermolekularen Flüssigkeiten ist die Kohäsionsenergiedichte CED ein wichtiger Parameter auf molekularer Ebene. Die Vernetzungsdichte ν eines polymeren Festkörpers bildet hierbei einen bedeutsamen Kennwert, der darüber hinaus neben der Löslichkeit wichtige Eigenschaften wie thermische Stabilität und Steifigkeit des Materials charakterisiert. Für die experimentelle Bestimmung von CED und ν eignet sich die Untersuchung des Quellverhaltens in unterschiedlichen Lösungsmitteln. Es werden zwei Messmethoden miteinander verglichen und die Ergebnisse unter Berücksichtigung des molekularen Aufbaus von Proben aus Polyurethan (PU) und hochmolekularem – (HMWPE) und ultrahochmolekularem Polyethylen (UHMWPE) diskutiert. Zum Verständnis des Quellverhaltens dieser Polymerproben in niedermolekularen Lösungsmitteln werden neben den Messergebnissen Literaturdaten zu Grunde gelegt.</abstract>
    <parentTitle language="deu">Wissenschaftliche Beiträge 2014</parentTitle>
    <identifier type="urn">urn:nbn:de:kobv:526-opus4-3372</identifier>
    <identifier type="doi">10.15771/0949-8214_2014_1_10</identifier>
    <identifier type="issn">0949-8214</identifier>
    <enrichment key="ZSTiteliD">16238</enrichment>
    <licence>Creative Commons - CC BY-NC-ND 3.0 DE - Namensnennung - Nicht-kommerziell - Keine Bearbeitung 3.0 Deutschland</licence>
    <author>Vesela Stoycheva</author>
    <author>Harald Goering</author>
    <author>Dietmar Wolff</author>
    <author>Michael Herzog</author>
    <collection role="ddc" number="541">Physikalische Chemie</collection>
    <collection role="ddc" number="547">Organische Chemie</collection>
    <collection role="Publikationen_der_TH_Wildau" number="">Wissenschaftliche Beiträge</collection>
    <collection role="institutes" number="">Fachbereich Ingenieur- und Naturwissenschaften</collection>
    <collection role="open_access" number="">open_access</collection>
    <collection role="green_open_access" number="3">Diamond Open Access</collection>
    <thesisPublisher>Technische Hochschule Wildau</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-th-wildau/files/337/10_Bestimmung_der_Kohaesionsenergie.pdf</file>
  </doc>
  <doc>
    <id>1880</id>
    <completedYear>2021</completedYear>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1285</pageFirst>
    <pageLast>1290</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>1016</volume>
    <type>article</type>
    <publisherName>Trans Tech Publications</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">From Biomaterial to Organoid - Bioprinting for Practice</title>
    <abstract language="eng">The current state of technology for 3D printing with biomaterials is based on the extrusion of viscous materials. Mostly, extrusion heads utilize pneumatic pressure systems or stepper motors to force the substrate onto a surface. These methods are well developed for high viscouse materials. However, processing low viscous liquids may cause leakages in the system. This could be solved by applying continuous extrusion. Additionally, in order to process gelable substrates, such as gelatine and agar, tempered print heads in combination with a multi stage tempering system are required to prevent the system from clogging. The ongoing work presented in this paper focuses on the development of an extrusion system, which should be able to process multiple viscosities of gelatine sequentially. In order to achieve this, several measurements to examine the properties, as well as the material parameters of different biomaterials are performed. In this process gel point, force resistance and elasticity are the factors of particularly interest. Due to their ability to gel and their availability, the most relevant biomaterials are gelatine and agar. Using this data, an extrusion system involving a peristaltic pump, a heated tube and a nozzle, has been developed. The next step envisaged is to calibrate the extruder based on the obtained data and finally to validate the printing process by printing simple geometric structures. Assuming that a positive evaluation is obtained, the printing system will be tested for printing first organic test structures from patient data using the examined biomaterials.</abstract>
    <parentTitle language="eng">Materials Science Forum</parentTitle>
    <identifier type="issn">0255-5476</identifier>
    <identifier type="issn">1662-9752</identifier>
    <identifier type="urn">urn:nbn:de:kobv:526-opus4-18802</identifier>
    <enrichment key="opus.import.date">2024-03-07T08:03:32+00:00</enrichment>
    <enrichment key="opus.source">sword</enrichment>
    <enrichment key="opus.import.user">sword</enrichment>
    <enrichment key="DOI_VoR">https://doi.org/10.4028/www.scientific.net/MSF.1016.1285</enrichment>
    <enrichment key="SourceTitle">Schlegel, V., Engels, A., Stoycheva, V., Bifaretti, S., &amp; Foitzik, A. H. (2021). From Biomaterial to Organoid - Bioprinting for Practice. Materials Science Forum, 1016, 1285–1290. https://doi.org/10.4028/www.scientific.net/msf.1016.1285</enrichment>
    <licence>DFG-geförderte Allianz- bzw. Nationallizenz</licence>
    <author>Volker Schlegel</author>
    <author>Andreas Engels</author>
    <author>Vesela Stoycheva</author>
    <author>Stefano Bifaretti</author>
    <author>Andreas Foitzik</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>agar</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>biomaterial</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>bioprinting</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>gelatin</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>validation of material parameters</value>
    </subject>
    <collection role="ddc" number="610">Medizin und Gesundheit</collection>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="institutes" number="">Fachbereich Ingenieur- und Naturwissenschaften</collection>
    <collection role="open_access" number="">open_access</collection>
    <collection role="Import" number="import">Import</collection>
    <collection role="green_open_access" number="2">Green Open Access</collection>
    <thesisPublisher>Technische Hochschule Wildau</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-th-wildau/files/1880/MSF.1016.1285.pdf</file>
  </doc>
</export-example>
