Rheology and processing of bloodmeal-based thermoplastics

Velram Balaji Mohan; Casparus J. R. Verbeek; Velram Balaji Mohan; Casparus J. R. Verbeek

doi:10.3934/matersci.2015.4.546

AIMS Materials Science

2015, Volume 2, Issue 4: 546-559. doi: 10.3934/matersci.2015.4.546

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Research article

Rheology and processing of bloodmeal-based thermoplastics

Velram Balaji Mohan ^{1,2
,
,},
Casparus J. R. Verbeek ²

1.
Centre for Advanced Composite Materials, University of Auckland, Auckland, New Zealand, 1010;
2.
University of Waikato, Hamilton, New Zealand, 3240

Received: 28 October 2015 Accepted: 07 December 2015 Published: 12 December 2015

The objective of this research was to determine the rheological properties and processing behaviour of NTP using capillary rheometry and batch mixing. These were evaluated at constant plasticiser content, but using three different ratios of water to plasticiser (triethylene glycol, TEG). Each of these was evaluated at 115, 120 and 125 ℃. It was shown that NTP is a non-Newtonian, shear thinning fluid. It was found that viscosity is highly dependent on water content; decreasing with increasing water content. At a shear rate of 15 s-1, the apparent viscosity for the reference formulation (60 parts water per hundred parts bloodmeal) was 2000 Pa.s compared to 7000 Pa.s for the formulation containing 30 parts water and 30 parts TEG (at 115 ℃). Viscosity decreased slightly with increasing temperature and the degree of non-Newtonian behaviour was mostly unaffected by temperature. The flow behaviour index, n, was found to be in the range 0.11 to 0.17, with no discernable temperature dependence. In the reference formulation, the total amount of plasticiser and ratio water to TEG was higher, which resulted in slightly different flow behaviour with respect to temperature. Batch mixing revealed that NTP crosslinks rapidly after about three minutes and was strongly dependent on temperature and mixing speed.
- bioplastic,
- viscosity,
- rheology,
- processability,
- capillary rheometry
Citation: Velram Balaji Mohan, Casparus J. R. Verbeek. Rheology and processing of bloodmeal-based thermoplastics[J]. AIMS Materials Science, 2015, 2(4): 546-559. doi: 10.3934/matersci.2015.4.546

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Abstract

The objective of this research was to determine the rheological properties and processing behaviour of NTP using capillary rheometry and batch mixing. These were evaluated at constant plasticiser content, but using three different ratios of water to plasticiser (triethylene glycol, TEG). Each of these was evaluated at 115, 120 and 125 ℃. It was shown that NTP is a non-Newtonian, shear thinning fluid. It was found that viscosity is highly dependent on water content; decreasing with increasing water content. At a shear rate of 15 s-1, the apparent viscosity for the reference formulation (60 parts water per hundred parts bloodmeal) was 2000 Pa.s compared to 7000 Pa.s for the formulation containing 30 parts water and 30 parts TEG (at 115 ℃). Viscosity decreased slightly with increasing temperature and the degree of non-Newtonian behaviour was mostly unaffected by temperature. The flow behaviour index, n, was found to be in the range 0.11 to 0.17, with no discernable temperature dependence. In the reference formulation, the total amount of plasticiser and ratio water to TEG was higher, which resulted in slightly different flow behaviour with respect to temperature. Batch mixing revealed that NTP crosslinks rapidly after about three minutes and was strongly dependent on temperature and mixing speed.

References

[1]	Barron AE, Zuckerman RN (1999) Bioinspired polymeric materials: In-between proteins and plastics. Curr Opin Cell Biol 3: 681-687. doi: 10.1016/S1367-5931(99)00026-5
[2]	Cuq B, Gontard N, Guilbert S (1998) Proteins as agricultural polymers for packaging production. Cereal Chem 75: 1-9. doi: 10.1094/CCHEM.1998.75.1.1
[3]	Verbeek CJR, van den Berg LE (2011) Development of proteinous bioplastics using bloodmeal. J Polym Environ 19: 1-10. doi: 10.1007/s10924-010-0232-x
[4]	Adamy M, Verbeek CJR (2013) Injection-molding performance and mechanical properties of blood meal-based thermoplastics. Adv Polym Tech 32.
[5]	Gómez-Martínez D, Partal P, Martínez I, et al. (2009) Rheological behaviour and physical properties of controlled-release gluten-based bioplastics. Bioresource Technol 100: 28-1832.
[6]	Lutz R, Aserin A, Portnoy Y, et al. (2009) On the confocal images and the rheology of whey protein isolated and modified pectins associated complex. Colloid Surface B 69: 43-50. doi: 10.1016/j.colsurfb.2008.10.011
[7]	Mohamed A, Biresaw G, Xu J, et al. (2009) Oats protein isolate: Thermal, rheological, surface and functional properties. Food Res Int 42: 107-114. doi: 10.1016/j.foodres.2008.10.011
[8]	Orliac O, Silvestre F, Rouilly A, et al. (2003) Rheological studies, production, and characterization of injection-molded plastics from sunflower protein isolate. Ind Eng Chem Res 42: 1674-1680. doi: 10.1021/ie020913x
[9]	Ralston BE, Osswald TA (2008) Viscosity of soy protein plastics determined by screw-driven capillary rheometry. J Polym Environ 16: 169-176. doi: 10.1007/s10924-008-0098-3
[10]	Verbeek CJR, van den Berg LE (2010) Extrusion processing and properties of protein-based thermoplastics. Macromol Mater Eng 295: 10-21. doi: 10.1002/mame.200900167
[11]	Bier JM, Verbeek CJR, Lay MC (2013) Thermal and mechanical properties of bloodmeal-based thermoplastics plasticized with tri(ethylene glycol). Macromol Mater Eng 299: 85-95.
[12]	Hernandez-Izquierdo VM, Krochta JM (2008)Thermoplastic processing of proteins for film formation- a review. J Food Sci 73: 30-39.
[13]	Vanin FM, Sobral PJA, Menegalli FC, et al. (2005) Effects of plasticizers and their concentrations on thermal and functional properties of gelatin-based films. Food Hydrocolloid 19: 899-907. doi: 10.1016/j.foodhyd.2004.12.003
[14]	Zhang Y, Han J (2008) Sorption isotherm and plasticization effect of moisture and plasticizers in pea starch film. J Food Sci 73: E313-E324. doi: 10.1111/j.1750-3841.2008.00867.x
[15]	Verbeek CJR, Koppel NJ (2012) Moisture sorption and plasticization of bloodmeal-based thermoplastics. J Mater Sci 47: 1187-1195. doi: 10.1007/s10853-011-5770-7
[16]	Çengel YA, Turner RH, Cimbala JM (2012) Fundamentals of thermal-fluid sciences with student resource dvd, McGraw-Hill, Boston.
[17]	Chhabra RP, Richardson JF (2011) Non-newtonian flow and applied rheology: Engineering applications, Butterworth-Heinemann.
[18]	Grellmann W, Seidler S (2007) Polymer testing, Hanser Verlag, Cincinnati,.
[19]	Vlachopoulos J, Strutt D (2003) The role of rheology in polymer extrusion in New Technology for Extrusion Conference. Milan, Italy, 20-21.
[20]	Wang H, Jiang L, Fu L( 2007) Properties of molded soy protein isolate plastics. J Appl Polym Sci 106: 3716-3720.
[21]	Li YD, Zeng JB, Li WD, et al. (2009) Rheology, crystallization, and biodegradability of blends based on soy protein and chemically modified poly(butylene succinate). Ind Eng Chem Res 48: 4817-4825. doi: 10.1021/ie801718f

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