Imperial College London

DrJanetWong

Faculty of EngineeringDepartment of Mechanical Engineering

Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 8991j.wong

 
 
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Location

 

671City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Guo:2018:10.3390/polym10030336,
author = {Guo, Y and di, Mare L and Li, R and Wong, J},
doi = {10.3390/polym10030336},
journal = {Polymers},
pages = {336--336},
title = {Cargo release from polymeric vesicles under shear},
url = {http://dx.doi.org/10.3390/polym10030336},
volume = {10},
year = {2018}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - In this paper we study the release of cargo from polymeric nano-carriers under shear. Vesicles formed by two star block polymers— A12B6C2 ( ABC ) and A12B6A2 ( ABA )—and one linear block copolymer— A14B6 ( AB ), are investigated using dissipative particle dynamics (DPD) simulations. A - and C -blocks are solvophobic and B -block is solvophilic. The three polymers form vesicles of different structures. The vesicles are subjected to shear both in bulk and between solvophobic walls. In bulk shear, the mechanisms of cargo release are similar for all vesicles, with cargo travelling through vesicle membrane with no preferential release location. When sheared between walls, high cargo release rate is only observed with ABC vesicle after it touches the wall. For ABC vesicle, the critical condition for high cargo release rate is the formation of wall-polymersome interface after which the effect of shear rate in promoting cargo release is secondary. High release rate is achieved by the formation of solvophilic pathway allowing cargo to travel from the vesicle cavity to the vesicle exterior. The results in this paper show that well controlled target cargo release using polymersomes can be achieved with polymers of suitable design and can potentially be very useful for engineering applications. As an example, polymersomes can be used as carriers for surface active friction reducing additives which are only released at rubbing surfaces where the additives are needed most.
AU - Guo,Y
AU - di,Mare L
AU - Li,R
AU - Wong,J
DO - 10.3390/polym10030336
EP - 336
PY - 2018///
SN - 2073-4360
SP - 336
TI - Cargo release from polymeric vesicles under shear
T2 - Polymers
UR - http://dx.doi.org/10.3390/polym10030336
UR - http://www.mdpi.com/2073-4360/10/3/336
UR - http://hdl.handle.net/10044/1/58414
VL - 10
ER -