Block length determines the adsorption dynamics mode of triblock copolymers to a hydrophobic surface

2016 ◽  
Vol 142 ◽  
pp. 180-189 ◽  
Author(s):  
Yisheng Xu ◽  
Kaihang Shi ◽  
Shuangliang Zhao ◽  
Xuhong Guo ◽  
Jie Wang
Keyword(s):  
Triblock Copolymers ◽  
Hydrophobic Surface ◽  
Block Length ◽  
Adsorption Dynamics

Topical delivery of retinol emulsions co-stabilised by PEO-PCL-PEO triblock copolymers: effect of PCL block length

2012 ◽  
Vol 29 (8) ◽  
pp. 739-746 ◽  
Author(s):  
Heui Kyoung Cho ◽  
Jin Hun Cho ◽  
Sung-Wook Choi ◽  
In Woo Cheong
Keyword(s):  
Triblock Copolymers ◽  
Topical Delivery ◽  
Block Length

Mesoscopic Simulations of Adsorption and Association of PEO-PPO-PEO Triblock Copolymers on a Hydrophobic Surface: From Mushroom Hemisphere to Rectangle Brush

Langmuir ◽  
2016 ◽  
Vol 32 (44) ◽  
pp. 11375-11385 ◽  
Author(s):  
Xianyu Song ◽  
Shuangliang Zhao ◽  
Shenwen Fang ◽  
Yongzhang Ma ◽  
Ming Duan
Keyword(s):  
Triblock Copolymers ◽  
Hydrophobic Surface ◽  
Mesoscopic Simulations

Micellisation of triblock copolymers of ethylene oxide and 1,2-butylene oxide: Effect of B-block length

2011 ◽  
Vol 361 (1) ◽  
pp. 154-158 ◽  
Author(s):  
Adriana Cambón ◽  
Manuel Alatorre-Meda ◽  
Josué Juárez ◽  
Antonio Topete ◽  
Dharmista Mistry ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Triblock Copolymers ◽  
Block Length

scholarly journals Formation of Asymmetric and Symmetric Hybrid Membranes of Lipids and Triblock Copolymers

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 639 ◽  
Author(s):  
Hsiang-Chi Tsai ◽  
Yan-Ling Yang ◽  
Yu-Jane Sheng ◽  
Heng-Kwong Tsao
Keyword(s):  
Lipid Bilayers ◽  
Triblock Copolymers ◽  
Dissipative Particle Dynamics ◽  
Block Length ◽  
Hybrid Membranes ◽  
Loop Conformations ◽  
Long Time ◽  
Small X ◽  
Time Invariant ◽  
Loop Conformation

Hybrid membranes formed by co-assembly of AxByAx (hydrophilic-hydrophobic-hydrophilic) triblock copolymers into lipid bilayers are investigated by dissipative particle dynamics. Homogeneous hybrid membranes are developed as lipids and polymers are fully compatible. The polymer conformations can be simply classified into bridge- and loop-structures in the membranes. It is interesting to find that the long-time fraction of loop-conformation ( f L ) of copolymers in the membrane depends significantly on the hydrophilic block length (x). As x is small, an equilibrium f L * always results irrespective of the initial conformation distribution and its value depends on the hydrophobic block length (y). For large x, f L tends to be time-invariant because polymers are kinetically trapped in their initial structures. Our findings reveal that only symmetric hybrid membranes are formed for small x, while membranes with stable asymmetric leaflets can be constructed with large x. The effects of block lengths on the polymer conformations, such as transverse and lateral spans ( d ⊥ and d ‖ ) of bridge- and loop-conformations, are discussed as well.

scholarly journals Triblock copolymers of styrene and sodium methacrylate as smart materials: synthesis and rheological characterization

2017 ◽  
Vol 89 (11) ◽  
pp. 1641-1658 ◽  
Author(s):  
Marc Meijerink ◽  
Frank van Mastrigt ◽  
Linda E. Franken ◽  
Marc C. A. Stuart ◽  
Francesco Picchioni ◽  
...  
Keyword(s):  
Smart Materials ◽  
Hydrophobic Interactions ◽  
Triblock Copolymers ◽  
Systematic Investigation ◽  
Block Length ◽  
Major Influence ◽  
Materials Synthesis ◽  
Rheological Characterization ◽  
A Minor ◽  
Sodium Methacrylate

AbstractWell-defined amphiphilic triblock poly(sodium methacrylate)-polystyrene-poly(sodium methacrylate) (PMAA-b-PS-b-PMAA) copolymers characterized by a different length of either the hydrophilic or the hydrophobic block have been synthesized by ATRP. In solution the micelle-like aggregates consist of a collapsed PS core surrounded by stretched charged PMAA chains. The micelles are kinetically ‘frozen’ and as a consequence the triblock copolymers do not show a significant surface activity. The hydrophilic block length has a major influence on the rheology, the shortest PMAA blocks yielding the strongest gels (at the same total weight concentration). The hydrophobic block length has only a minor influence until a certain threshold, below which the hydrophobic interactions are too weak resulting in weak gels. A mathematical model is used to describe the micelle radius and the results were in good agreement with the experimentally found radius in transmission electron microscopy. The influences of the ionic strength, pH and temperature on the rheology has also been investigated, showing the potential of these polymers as smart hydrogels. The change in conformation of the hydrophilic corona from the collapsed state to the stretched state by changing the pH was quantified with zeta-potential measurements. To the best of our knowledge, this is the first systematic investigation of this kind of triblock copolymers in terms of their rheological behavior in water.

Interaction between bile salt sodium glycodeoxycholate and PEO–PPO–PEO triblock copolymers in aqueous solution

RSC Advances ◽  
2016 ◽  
Vol 6 (73) ◽  
pp. 69313-69325 ◽  
Author(s):  
S. Bayati ◽  
C. Anderberg Haglund ◽  
N. V. Pavel ◽  
L. Galantini ◽  
K. Schillén
Keyword(s):  
Aqueous Solution ◽  
Molecular Weight ◽  
Block Copolymer ◽  
Bile Salt ◽  
Bile Salts ◽  
Triblock Copolymers ◽  
Block Length ◽  
Molar Ratio ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles

Bile salts can associate to PEO–PPO–PEO block copolymer micelles and disintegrate them depending on the relative block length and molecular weight of the copolymers and bile salt/copolymer molar ratio.

Synthesis and self-assembly of ABC linear triblock copolymers to target CO2-responsive multicompartment micelles

RSC Advances ◽  
2016 ◽  
Vol 6 (89) ◽  
pp. 86728-86735 ◽  
Author(s):  
Hanbin Liu ◽  
Zanru Guo ◽  
Shuai He ◽  
Hongyao Yin ◽  
Yujun Feng
Keyword(s):  
Self Assembly ◽  
Triblock Copolymers ◽  
Block Length ◽  
Abc Triblock Copolymers ◽  
Spherical Micelles ◽  
Multicompartment Micelles ◽  
Stimulation Of

A series of ABC triblock copolymers were synthesized by tailoring the block length, suggesting polymers in a narrow composition window (0.34 ≤ fF ≤ 0.38) might transform from spherical micelles to multicompartment micelles upon stimulation of CO2.

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