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Nanoenabled membranes based on bio-materials for
water purification
Aji P Mathew
Division of Materials ScienceLuleå University of Tehnology, Sweden
April 23-24, 2012- Thessaloniki, Greece
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Outline
§ General facts
§ Project concept and aims
§ Biobased nanomaterials
§ Membrane/ filter processing
§ Conclusions
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§NanoSelect, EU FP7, NMP4-SL-2012-280519
§Functional membranes/filters with anti/low-fouling surfaces for water purifcation, through selective adsorption on biobased nanocrystals and fibrils
§Start date : 1st Feb, 2012
§Duration: 48 months
§Total Budget: 3.8 MEuros
General facts
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Consortium
Participant No.
Legal Name Country Org. Type
1 LTU Sweden Univ2 VTT Finland RO3 Imperial UK Univ4 EMPA Switzerland RO5 UM Slovenia Univ6 FideNa Spain RO7 Acondaqua Spain SME8 Processum Sweden SME9 AlfaLaval Sweden IND
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Project Concept
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§ Development of bio-based nano-enhanced membranes for water treatment, with special focus on fertilizers, pesticides, heavy metal ions and microbial contaminants relevant in Europe
§ Use biobased nanomaterials like cellulose nanofibers and cellulose or chitin nanocrystals isolated from industrial residues and side-streams
§ Tailored interaction with contaminants and low/ anti fouling by surface functionalization
§ The membranes and filters, possibly compostable after use ( eg. with recovered fertilizers)
§ Prototype of membrane modules and scale up plan
The main objectives of NanoSelect
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Implementation plan
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Nanomaterials
ManMan--mademade
Nano claysNano claysNanosilicaNanosilicaCarbon nanotubesCarbon nanotubesCarbon nanowiresCarbon nanowiresTiOTiO22 nanoparticlesnanoparticlesAg nanoparticlesAg nanoparticles
From natureFrom nature
Cellulose fibrilsCellulose fibrilsCellulose whiskersCellulose whiskersChitin whiskersChitin whiskersCollagen fibrilsCollagen fibrils
Cellulose fibrils
Chitin whiskers
2 D
3 D
Metal nanoparticles
2 D
Carbon nanowires
1 D
Nanosilicates
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Top- down approach to reach nano scale
Cellulose chains
Cellulose
Lignin
Hemicellulose
Microfibril
Crystalline
Amorphous
3 nm
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Separation of nanocellulose and nanochitin:Nanofibers and nanocrystals
§ Mechanical treatments§Ultra fine grinding §High pressure homogenizing§Ultra sonication
§ Chemical treatments§Acid hydrolysis§Enzymatic treatments
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Mechanical separation of nanofibers
Soaking in water and mixing
Refining (grinding) Is
olat
ion
proc
ess
Repeated until gel formation
Puri
ficat
ion
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Nanofibers from biobased resourcesBarley Grass Otas Carrot residueSludge
Nanofibers from residues
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Isolation of cellulose nanocrystals
D. Bondeson, A. Mathew, K. Oksman, Cellulose, 2006, 13(2), 171-180
2.
HCL or H2SO4
3.
Heating
6.
Sonication
4.
Centrifugation
5.
Dialysis
1.H2O
+MCC
MCC Cellulose whiskers
200 nm20 µm
10 – 15 µm
Acid hydrolysis with HCL or H2SO4
amorphous cellulosecrystalline cellulose
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Nanocrystals: Where to get them?
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What makes natural nanomaterials interesting?
§High mechanical properties; Stiffness, 150 GPa- Stronger than cast iron (100Gpa)
§ Defect free
§ Large surface area
§ Possibility for functionalization
§ Biodegradable/ biocompatible
§ Non-toxic
§ Green
cfbt-us.com
www.imageenvision.com
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Current scenario
§Large interest for bionano-materials
§Research focused on§New raw materials sources§Nanocomposite materials §Modelling§Organized/ self assembled structures§Large scale / pilot scale production§Products: automotives, medical, cosmetics,
textiles, sport goods, electronics, packaging
Cellu Comp, Carrot Stix™www.cellucomp.com
H Yano Kyoto, Japan
Water cleaning membranes…. a new application area….
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Porous membranes
§ Electrospinning§Polymer and nanocrystals§Porous mats reinforced and functionalised
with nanocrystals
§ Aerogels §Extremely lightweight materials §Both whiskers and nanofibers§Porous solid materials with a density as
low as 10 g/cm3
§Sol-gel process and freeze drying/ supercritical CO2 drying
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Dense membranes
§ Film casting §Solvent casting and tape casting§Functional polymers, nanofibers and
nanocrystals§Multi functional layered structures
§ Coatings §Functional polymers, nanofibers and
nanocrystals on support layers§Thin layers using spin-coating, dip-coating,
LBL assembly etc§Multilayered structures
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Conclusions
§ NanoSelect project is expected to lead to
§Know-how on the interaction of biobased nanomaterials (cellulose/ chitin nanocrystals and nanofibers) with contaminants in water
§Membranes/ filters functionalised with biobased nanomaterials for water cleaning
§New use for nanocellulose/ nanochitin, as functional additive in water cleaning
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AcknowledgementsFinancial support from European Commission under EU FP7, NMP4-SL-2012-280519, NanoSelect is gratefully acknowldeged.
Thank you for listening…
www.nanoselect.eu