International Conference on Sustainable Built Environment
description
Transcript of International Conference on Sustainable Built Environment
![Page 1: International Conference on Sustainable Built Environment](https://reader036.fdocuments.in/reader036/viewer/2022062411/56816867550346895ddecf1e/html5/thumbnails/1.jpg)
International Conference on Sustainable Built Environment
NANCO AND UNIVERSITY OF MELBOURNE JOINT RESEARCH SESSION ON NANOTECHNOLOGY AND SUSTAINABLE BUILT ENVIRONMENT
13-14 December, 2010 at Earls Regency, Kandy, Sri Lanka
![Page 2: International Conference on Sustainable Built Environment](https://reader036.fdocuments.in/reader036/viewer/2022062411/56816867550346895ddecf1e/html5/thumbnails/2.jpg)
NATURAL RUBBER/LAYERED SILCATE NANOCOMPOSITEFOR BUILDING APPLICATIONS
T.C. Peiris (BSc Eng, MSc)
U.N. Rathnayake (PhD. Loughborough)
![Page 3: International Conference on Sustainable Built Environment](https://reader036.fdocuments.in/reader036/viewer/2022062411/56816867550346895ddecf1e/html5/thumbnails/3.jpg)
Outline
Conventional rubber composites
Importance of nanotechnology
Feasible nanomaterial and processing with it
Results and discussion
Future directions
![Page 4: International Conference on Sustainable Built Environment](https://reader036.fdocuments.in/reader036/viewer/2022062411/56816867550346895ddecf1e/html5/thumbnails/4.jpg)
Key applications in construction industry:
Conventional rubber composites
- Tires/Tracks
- Load bearings (Bridge bearings, Fenders, etc.)
- Bushes, Mounts, Floorings
- Hoses, Belts, Rollers, Sheets, etc.
Rubber/s +
Carbon black/Silica
![Page 5: International Conference on Sustainable Built Environment](https://reader036.fdocuments.in/reader036/viewer/2022062411/56816867550346895ddecf1e/html5/thumbnails/5.jpg)
Requirements:
Conventional rubber composites Contd.
- A reinforcing material from non-polluted route
- Non- petroleum product
- Cost effectiveness
- Non- hazardous to process
Is there a material to replace Carbon black?
- If so,
![Page 6: International Conference on Sustainable Built Environment](https://reader036.fdocuments.in/reader036/viewer/2022062411/56816867550346895ddecf1e/html5/thumbnails/6.jpg)
Advantages of Rubber nanocomposites (RNCs)
Importance of nanotechnology
- Improved mechanical properties at very low loading levels of nanomaterials
- Substitute for Rubber / Carbon black or Silica composites
Inert materials reinforcing fillers
- Improved barrier properties
- Improved thermal stability
![Page 7: International Conference on Sustainable Built Environment](https://reader036.fdocuments.in/reader036/viewer/2022062411/56816867550346895ddecf1e/html5/thumbnails/7.jpg)
Montmorillonite (MMT):
Feasible nanomaterial & processing with it
- Inorganic layered silicate
- Provides easy surface modification
- In-situ nanofiller formation via:
- Intercalation and exfoliation of MMT
Preparation of RNCs:
- Solution intercalation
- In-situ polymerisation
- Latex route
- Melt blending (Banbury and two-roll mixing)
Paul D.R., Robenson L.M. Polymer nanotechnology: nanocomposites, Journal of Polymer 49 (2008) 3187-3204
![Page 8: International Conference on Sustainable Built Environment](https://reader036.fdocuments.in/reader036/viewer/2022062411/56816867550346895ddecf1e/html5/thumbnails/8.jpg)
Preparation of Natural rubber NCs through melt blending:
Feasible nanomaterial & processing with it Contd.
- By organically modifying the MMT (i.e. OMMT)
- By incorporating polar additives to the rubber
1) Compatibility between the rubber and the MMT
- By optimising the shear level during the mixing
- By optimising the processing time, temperature
2) Adjusted processing parameters
Thereby achieving maximum intercalation and exfoliation
![Page 9: International Conference on Sustainable Built Environment](https://reader036.fdocuments.in/reader036/viewer/2022062411/56816867550346895ddecf1e/html5/thumbnails/9.jpg)
Intercalation and exfoliation
Feasible nanomaterial & processing with it Contd.
Paul D.R., Robenson L.M. Polymer nanotechnology: nanocomposites, Journal of Polymer 49 (2008) 3187-3204
![Page 10: International Conference on Sustainable Built Environment](https://reader036.fdocuments.in/reader036/viewer/2022062411/56816867550346895ddecf1e/html5/thumbnails/10.jpg)
Results & discussion
NRGUM
NRLS4 NRLS8 NRLS10 NRLS4/90 NRLS10/90 NRLS15/90 NRCB30/90
NR 100 100 100 100 100 100 100 100OMMT - 4 8 10 4 10 15 CB 30Polar additive - 0.46 0.92 1.15 0.46 1.15 1.73 -CaCO3 - - - - 90 90 90 90ZnO 5 5 5 5 5 5 5 5Stearic acid 1 1 1 1 1 1 1 1IPPDa 1 1 1 1 1 1 1 1Sulphur 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5MBTSb 1 1 1 1 1 1 1 1
Several compounds were prepared
- All values are in phr (parts per hundred parts of rubber)
![Page 11: International Conference on Sustainable Built Environment](https://reader036.fdocuments.in/reader036/viewer/2022062411/56816867550346895ddecf1e/html5/thumbnails/11.jpg)
Vulcanisation characteristics
Results & discussion Contd.
![Page 12: International Conference on Sustainable Built Environment](https://reader036.fdocuments.in/reader036/viewer/2022062411/56816867550346895ddecf1e/html5/thumbnails/12.jpg)
X-ray diffractometer analysis
- Target: for no-peak situation
Results & discussion Contd.
Two theta
![Page 13: International Conference on Sustainable Built Environment](https://reader036.fdocuments.in/reader036/viewer/2022062411/56816867550346895ddecf1e/html5/thumbnails/13.jpg)
Results & discussion Contd.
SEM image of cured NRLS4
![Page 14: International Conference on Sustainable Built Environment](https://reader036.fdocuments.in/reader036/viewer/2022062411/56816867550346895ddecf1e/html5/thumbnails/14.jpg)
Intercalation and exfoliation
Feasible nanomaterial & processing with it Contd.
N+2R
![Page 15: International Conference on Sustainable Built Environment](https://reader036.fdocuments.in/reader036/viewer/2022062411/56816867550346895ddecf1e/html5/thumbnails/15.jpg)
Results & discussion Contd.
Tensile strength and Modulus
![Page 16: International Conference on Sustainable Built Environment](https://reader036.fdocuments.in/reader036/viewer/2022062411/56816867550346895ddecf1e/html5/thumbnails/16.jpg)
Compound Hardness(Shore A)
Tensile strength
(MPa)
Modulus-300%(MPa)
Tear strength(KN/m)
Elongation(%)
Compression set(%)
Rebound resilience
(%)
NR-gum 31.75 13.15 0.99 29.15 726 80
NRLS4/90 55.92 19.14 5.75 42.01 557 7.22 72
NRCB30/90a 59.50 15.56 5.95 33.35 521 12.08 60
PROPERTIES ASTM STANDARDS REQUIRED
T.S.(Mpa) D 412 15.6
Elongation at Break % D 412 >350
Hardness (Shore A) D2240 60 (±5)
Compressive set % D395 35
*Engineering with rubber : how to design rubber components / Alan N.** http://pretread.com/
Results & discussion Contd.
- Bridge bearings * - Required properties for bridge bearings**
![Page 17: International Conference on Sustainable Built Environment](https://reader036.fdocuments.in/reader036/viewer/2022062411/56816867550346895ddecf1e/html5/thumbnails/17.jpg)
Future directions
- Preparation of NCs with 100% exfoliation
- Preparation of NCs by rubber blends
- Further improvements along barrier properties & thermal stability
- Improvements towards functional materials (antistatic,
electrical, magnetic or hybrid etc.)
![Page 18: International Conference on Sustainable Built Environment](https://reader036.fdocuments.in/reader036/viewer/2022062411/56816867550346895ddecf1e/html5/thumbnails/18.jpg)
Acknowledgement
Prof. Ajith De Alwis & Prof. Veranja karunarathne for the leadership given
Team NANCO
Loadstar Pvt, Ltd
![Page 19: International Conference on Sustainable Built Environment](https://reader036.fdocuments.in/reader036/viewer/2022062411/56816867550346895ddecf1e/html5/thumbnails/19.jpg)
Thank you …