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| 001 | 843618 | ||
| 005 | 20240619083544.0 | ||
| 024 | 7 | _ | |a 10.1016/j.colsurfa.2018.01.052 |2 doi |
| 024 | 7 | _ | |a 0927-7757 |2 ISSN |
| 024 | 7 | _ | |a 1873-4359 |2 ISSN |
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| 037 | _ | _ | |a FZJ-2018-01200 |
| 041 | _ | _ | |a English |
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| 100 | 1 | _ | |a Liu, Yi |0 P:(DE-Juel1)159482 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Self-, co-organisation behaviour and encapsulation efficiency of waterborne polyurethane pre–polymers |
| 260 | _ | _ | |a Amsterdam [u.a.] |c 2018 |b Elsevier Science |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a Polyurethane-prepolymers are the precursor for waterborne polyurethane coating applications. The physical–chemical behavior of the pre-polymers are worth thorough investigation, since they will largely influence the final properties of coating products [1–3]. In this paper, we experimentally studied the self-, co-organization characteristics and encapsulation efficiency of a polyurethane pre-polymer in aqueous electrolyte environment, by means of light scattering and small angle X-ray scattering. Due to the amphiphilic nature, pre-polymers are expected to form micelles in water. Systematic studies were conducted on dispersions at different pre-polymer concentrations and salt concentrations. Our experiments show that the micelles have a radius of about 10 nm and are stable over a broad range of salt concentrations; only at high salt, 100 mM NaCl, we observe the onset of colloidal instability. Moreover, we find that the amphiphilic pre-polymers are able to encapsulate hydrophobic counterparts, forming particles with radii of about 130 nm. The threshold ratio of hydrophilic over hydrophobic pre-polymers to form stable dispersion is found to be 5:1. |
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| 700 | 1 | _ | |a Tennebroe, Ronald |0 P:(DE-HGF)0 |b 3 |
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