Synthesis and phase transition energy storage capability of a cross-linked PEG/LACE copolymer

Maimaiti, Halidan; Xu, Sumei; Aerken, Xuekelaiti; Wumaier, Minawar

doi:10.1039/c4ra15984e

Cited by 5 publications

(2 citation statements)

References 17 publications

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“…Tw opeaks at q = 1.36 1/ (2q (CuKa) = 19.48 8)and at q = 1.65 1/ (2q = 23.68 8)were observed, similar to diffraction pattern of crystalline PEG. [13] When the pre-formed cubes were heated to 70 8 8Conanaluminum substrate for 1h, their cubic morphology was destroyed ( Figure S5(b)). These results imply that the evaporation-induced crystallization of PEG block of micelles is one important factor for the formation of cubes.T his crystallization is likely kinetically controlled and is constrained by the pre-assembly of the micellar aggregates under particular drying conditions.…”

Section: Angewandte Chemiementioning

confidence: 99%

Formation of Polymeric Nanocubes by Self‐Assembly and Crystallization of Dithiolane‐Containing Triblock Copolymers

et al. 2017

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Template-free fabrication of non-spherical polymeric nanoparticles is desirable for various applications, but has had limited success owing to thermodynamic favorability of sphere formation. Herein we present a simple way to prepare cubic nanoparticles of block copolymers by self-assembly from aqueous solutions at room temperature. Nanocubes with edges of 40-200 nm are formed spontaneously on different surfaces upon water evaporation from micellar solutions of triblock copolymers containing a central poly(ethylene oxide) block and terminal trimethylene carbonate/dithiolane blocks. These polymers self-assemble into 28±5 nm micelles in water. Upon drying, micelle aggregation and a kinetically controlled crystallization of central blocks evidently induce solid cubic particle formation. An approach for preserving the structures of these cubes in water by thiol- or photo-induced crosslinking was developed. The ability to solubilize a model hydrophobic drug, curcumin, was also explored.

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Section: Angewandte Chemiementioning

confidence: 99%

Formation of Polymeric Nanocubes by Self‐Assembly and Crystallization of Dithiolane‐Containing Triblock Copolymers

et al. 2017

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“…In previous studies, it was reported that conventional PCMs such as paraffins (CH 3 –(CH 2 ) n –CH 3 ), poly(ethylene glycol) (PEG), and fatty acids could be easily grafted onto cellulose or cellulosic fabrics for the fabrication of shape stable SSPCMs. − However, SSPCMs synthesized in this manner are strongly rigid, even at temperatures above its phase change temperature. A lack of physical flexibility is ascribed to the low degree of grafting due to the large steric hindrance between the hydroxyl groups of cellulose and the linear chains of PCMs .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Thermal-to-Flexible Phase Change Materials Based on Cellulose/Modified Graphene Composites for Thermal Management of Solar Energy

Qian¹,

Han²,

Zhang

et al. 2019

ACS Appl. Mater. Interfaces

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The applications of phase change materials (PCMs) in some practical circumstances are currently limited due to the constant strong rigidity, poor thermal conductivity, and low photoabsorption property. Therefore, the design of flexibility-enhanced, highly efficient PCMs is greatly desirable and challenging. In this work, novel PCM composites (CPmG-x) with stable forms and thermally induced flexibility were successfully prepared by grafting the comblike poly-(hexadecyl acrylate) polymer (PA16, phase change working substance) onto a cellulose support by atom transfer radical polymerization (ATRP). Modified graphene (GN16) was incorporated into the synthesized material to enhance its enthalpy, thermal conductivity, and physical strength. The prepared CPmG-x composites exhibit excellent softness and flexibility after phase transition of PA16. The addition of GN16 increases the thermal conductivity and enthalpy of CPmG-x materials to 1.32 W m −1 K −1 (9 wt % GN16) and 103 J g −1 (5 wt % GN16), respectively. Assessments of the solar-to-thermal energy conversion and storage efficiencies indicate that CPmG-x composites possess great potential for use in thermal energy management applications and solar energy collection systems.

show abstract

Formation of Polymeric Nanocubes by Self‐Assembly and Crystallization of Dithiolane‐Containing Triblock Copolymers

et al. 2017

View full text Add to dashboard Cite

Template-free fabrication of non-spherical polymeric nanoparticles is desirable for various applications,b ut has had limited success owing to thermodynamic favorability of sphere formation. Herein we present as imple way to prepare cubic nanoparticles of blockcopolymers by self-assembly from aqueous solutions at room temperature.Nanocubes with edges of 40-200 nm are formed spontaneously on different surfaces upon water evaporation from micellar solutions of triblock copolymers containing ac entral poly(ethylene oxide) block and terminal trimethylene carbonate/dithiolane blocks.T hese polymers self-assemble into 28 AE 5nmmicelles in water.Upon drying, micelle aggregation and ak inetically controlled crystallization of central blocks evidently induce solid cubic particle formation. An approach for preserving the structures of these cubes in water by thiol-or photo-induced crosslinking was developed. The ability to solubilizeamodel hydrophobic drug, curcumin, was also explored.

show abstract

Synthesis and phase transition energy storage capability of a cross-linked PEG/LACE copolymer

Cited by 5 publications

References 17 publications

Formation of Polymeric Nanocubes by Self‐Assembly and Crystallization of Dithiolane‐Containing Triblock Copolymers

Formation of Polymeric Nanocubes by Self‐Assembly and Crystallization of Dithiolane‐Containing Triblock Copolymers

Enhanced Thermal-to-Flexible Phase Change Materials Based on Cellulose/Modified Graphene Composites for Thermal Management of Solar Energy

Formation of Polymeric Nanocubes by Self‐Assembly and Crystallization of Dithiolane‐Containing Triblock Copolymers

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