| 词条 | Arboform | |||||||||||||||||||||||||
| 释义 |
Arboform (from {{lang-la|arbor}} meaning tree) is a trade name for a bioplastic composed of three natural components: lignin, cellulose fibers and some additives. As a thermoplastic, it can be molded and is therefore also called 'liquid wood'. HistoryArboform was developed in 1996 by Helmut Nägele and Jürgen Pfitzer at the Fraunhofer Institute for Chemical Technology. In 1998, they founded a spin-off company Tecnaro,[1] and already in 2002, the company produced about 300 tonnes of Arboform and was selling it at a price of about $5.5/kg.[2] In 2010, Nägele and Pfitzer received the European Inventor Award for their work on Arboform. Composition and propertiesArboform consists of the two most abundant natural materials: lignin (ca. 30%) and cellulose (ca. 60%). The remaining part is natural additives that function as plasticizers, dyes, antioxidants, fillers, etc.[1] It has a similar composition, appearance and properties to those of wood, but it can be melted upon heating and molded like a thermoplastic.[2] It has been designed to[3]
When the amount of cellulose in Arboform is increased from 30 to 60%, its tensile strength increases from 9.5 to 14.5 N/mm2 and bending stress increases from ca. 23 to 39 N/mm2, while the indentation hardness and impact strength remain almost constant at ca. 135 N/mm2 and 3.2 mJ/mm2, respectively.[4] Other typical properties of Arboform are:[5] thermal conductivity 0.38 W/(m·K), electrical resistivity ~5 GOhm, water content 2–8%.
SynthesisArboform is typically sold as pea-sized granules of various colors. Their production method differs from those used for synthetic polymers in that it avoids excessive thermal stresses and overheating that can degrade the natural components of Arboform.[7] The granules can then be molded into desired shapes, e.g. a wrist watch frame, using injection molding at temperatures of 150–170 °C. After molding, the material has a density of about 1.4 g/cm3.[8] It can be sawed, burned and disposed of in ways similar to those for wood, i.e. it is a biodegradable material.[9] References1. ^Nägele, 107 [10][11]2. ^Nägele, 101–102 3. ^Nägele, 104 4. ^Nägele, 109–110 5. ^Nägele, 116 6. ^Nägele, 115 7. ^Nägele, 106 8. ^Nägele, 111 9. ^Nägele, 114 10. ^1 {{cite book|author1=Suzanne Wetzel|author2=Luc Clement Duchesne|author3=Michael F. Laporte|title=Bioproducts From Canada's Forests: New Partnerships in the Bioeconomy|url=https://books.google.com/books?id=sD3aL_U024EC&pg=PA69|date=2006|publisher=Springer|isbn=978-1-4020-4991-0|pages=69–|deadurl=no|archiveurl=https://web.archive.org/web/20171124205619/https://books.google.com/books?id=sD3aL_U024EC&pg=PA69|archivedate=2017-11-24|df=}} 11. ^1 {{cite book|author=Rainer Höfer|title=Sustainable Solutions for Modern Economies|url=https://books.google.com/books?id=5AG42e0qkHMC&pg=PA328|date=2009|publisher=Royal Society of Chemistry|isbn=978-1-84755-905-0|pages=328–|deadurl=no|archiveurl=https://web.archive.org/web/20171124205619/https://books.google.com/books?id=5AG42e0qkHMC&pg=PA328|archivedate=2017-11-24|df=}} }} Bibliography
1 : Bioplastics |
|||||||||||||||||||||||||
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。