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Nanotechnology and the paper

Growing Trend in Nanotechnology. Nanotechnology Based on the Application in Various Market Segment. Mechanical Tailoring and control (Lightweight paper with high strength= Aerogel). Lignocellulose Control and conformation tailoring ( Improved construction materials). Thermal Properties and functionality ( Controlled heat conductivity and capacity).

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Nanotechnology and the paper

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    1. Nanotechnology and the paper/forest product industry Dan Coughlin Paul Gilbert Steven Masia Tety Roper

    2. Growing Trend in Nanotechnology

    3. Nanotechnology Based on the Application in Various Market Segment

    5. Nanotechnology Current Products, Approaches and New Processes Current challenges Forest Nanomaterials Strength improvements Water-Lignocellulose interaction Cellulose nanocomposites Viscose and Rayon containing Nanoparticles Applications of Nanopigments and Nanocoatings Photonics and Electronic/Piezo properties What is possible?

    6. Current Products, Approaches and New Processes

    7. Current products Method of making paper products using calcium carbonate nanoparticles. US patent: 20050247421 Retention systems: http://www.tappi.org/s_tappi/doc_bookstore.asp?CID=5071&DID=526601 http://www.tappi.org/s_tappi/doc_bookstore.asp?CID=5071&DID=526602 http://www.papermaking-chemistry.com/spring05.htm

    9.

    10. Nanotechnology in Paper Application Nano-Engineering Particle Surfaces Controlled particle dispersion in polymer matrix Improved effectiveness of light scattering Protection of filler or pigment from external influences Improved compatibility by promoting interaction between filler with binder or co-binder Increased surface area leading to improved ink receptibility Stimuli responsive triggered by pH, temperature, moisture, or magnetic response Nanofiber

    11. Controlled Modification of Clay platelets Physical Approach driven by electrostatic interactions between oppositely charged species that generates a stable end product Chemical Approach functionalization of clay surface using covalent bonded molecules allowing the tuning of hydrophobicity and functionality

    12. Electrospinning of Nanofiber Incorporation of Nanoparticles into Electrospinning solution to create Nanofibers with various properties (A) Encapsulation of iron oxide Nanoparticles into Nanofibers conductive (B) Deposition of silver Nanoparticles on the NanoFiber surface antimicrobial (C) Nanofibers with porous structure scattering (D) Uniaxilly aligned Nanotubes scatter or perhaps controlled released?

    13. Application of Nanotechnology in Other Areas Special Effect Pigments used in printing, packaging and specialty coating i.e. Pearl Lustre Pigments Textile industry Cousin to paper industry (both based on cellulose products) Water repellant Nanowhiskers and Nanosphere (Nanotex and Schoeller) UV protection fabric sol gel method to treat the cotton fabric or nanorods Antibacterial fabric impregnated fabric with Nanosilver Wrinkle resistant incorporation of Nanosilica with maleic anhydride to improve crosslinking to create wrinkle resistance in silk Catalyst paper - for Photocatalytic degradation using TiO2 Nanoparticles http://scholar.ilib.cn/A-zgzz200412015.html Optically transparent products for electronics/displays/packaging http://adsabs.harvard.edu/abs/2005ApPhA..81.1109I

    14. Current Challenges

    16. Nanocellulose Fiber: Nanofilters

    25. Double tensile strength of paper with 10 nm LbL coating Zheng, McDonald, Khillan, Su, Shutava, Grodzits, and Lvov

    26. Viscose and Rayon containing Nanoparticles Viscose fiber: CN 2005-10104905 Dry breaking strength 2.10 CN/dtex, Wet breaking strength 1.20 CN/dtex Dry breaking elongation 16% By adding 2-12% nanoscale carbon colloid with particle size 20-40 nm Rayon antibacterial: CN 2005-10104907 Nanoscale silver antibacterial agent with particle size 50-65 nm

    28. News, 45 g/m

    30. Cellulose Nanocomposites Cellulose with Nanoclay Flame retardant: WO 2007022552 Composite: CN 2005-10033705 Cellulose with carbon Nanotubes For electro active paper: http://spiedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PSISDG006168000001616823000001&idtype=cvips&gifs=yes Composite nonwoven fabric for Medical applications WO 2006060398 US 2005142973 US 2003-483839P Cellulose Nanocrystals http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=15762677&dopt=Abstract

    32. Whats a Photonic Crystal A material containing two discrete components having different indexes of refraction arranged in a particular periodic fashion 1D is wavelength dielectric mirror 3D is similar scale holes arranged in a crystal-like configuration in a dielectric medium

    34. What Type of Mirror? Standard Aluminum Mirror only < 90% efficient Front-Surface Silver = 95%, but tarnishes ! Conventional Broadband Dielectric Mirror can exceed 98% but is $200/sq.inch and is not flexible (sputtered coatings) 3M ESR Polymeric Film is > 98% over the entire visible spectrum and incident angles and costs $15/sq.ft. and is very flexible. 3D Photonic Crystal Slabs > 99% over the entire visible spectrum and incident angles.

    35. What is possible? Nano-optics control of opacity Nanoparticle Arrays on Surfaces for Electronic, Optical, and Sensor Applications Self assembly

    36. What is possible? Electronic devices Nanoelectromechanical memory Gate dielectrics Nanopillars for zero-field microwave generation Cellulose as a nanotemplate: http://pubs.acs.org/cgi-bin/abstract.cgi/bomaf6/2004/5/i03/abs/bm034532u.html

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