Preparation and properties of phase‐change heat‐storage UV curable polyurethane acrylate coating

Shi, Yeting; Wu, Yijian; Zhu, Lizhi; Shentu, Baoqing; Wang, Zhixue

doi:10.1002/app.41266

Cited by 19 publications

(5 citation statements)

References 24 publications

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“…In summary, the system of first order ordinary differential equations, i.e., state variable equations, solved during the cooling season is composed of Equations (6), (8), and (10). Conversely, the state variable equations solved during the heating season are composed of Equations (7), (9), and (11).…”

Section: Reference Modelmentioning

confidence: 99%

“…Researchers such as Madhumathi et al [5] and Zhu et al [6] investigated the use of phase change materials to improve energy consumption due to climate control in dwellings located in hot environments. Similarly, Tan et al [7] and Shi et al [8] investigated the use of phase change coatings for heat management. In the early 60s, increased capacitance was part of a solar building plan through the study of geodesic domes [9,10].…”

Section: Introductionmentioning

confidence: 99%

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A First-Order Study of Reduced Energy Consumption via Increased Thermal Capacitance with Thermal Storage Management in a Micro-Building

2015

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This study uses a first-order approximation of a micro-building to investigate the major factors determining how increased thermal capacitance (ITC) with thermal storage management (TSM) can reduce energy consumption in locations with relatively mild weather conditions such as the southeastern part of the United States of America. In this study, ITC is achieved through water circulation between a large storage tank and pipes embedded within the building envelope. Although ITC results in a larger dominant time constant for the thermal response of a building, an adaptive allocation and control of the added capacitance through TSM significantly improves the benefits of the extra capacitance. This paper compares two first-order models for a micro-building: a reference case model with a single lumped thermal capacitance associated with the building, and another model, with the building's capacitance plus the capacitance of the water system. Results showed that the ITC/TSM system reduced the cost of conditioning the building by reducing the operating time of both the cooling and the heating systems. May through September, the air conditioning operating time was reduced by an average of 70%, and October through April, the operation of the heating system was reduced by an average of 25%.

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Section: Reference Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A First-Order Study of Reduced Energy Consumption via Increased Thermal Capacitance with Thermal Storage Management in a Micro-Building

2015

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“…[ 33,34 ] 2) Reactivity of PCMs component is not high enough, so photo or thermal initiating, high temperature curing, or post‐treatment is inevitable. [ 35 ] For example, Tan et al. [ 36 ] prepared paraffin/high‐density polyethylene (HDPE) phase‐change coatings on Al substrates via spray technique, but considerable amount of polyurethane and curing agent were used since paraffin/HDPE composite powder could not self‐cross‐link.…”

Section: Introductionmentioning

confidence: 99%

Ultra‐Stable Phase Change Coatings by Self‐Cross‐Linkable Reactive Poly(ethylene glycol) and MWCNTs

Cui

Wang

et al. 2021

Adv Funct Materials

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Form‐stable phase change materials (PCMs) have great potential to regulate the unbalanced heat demand and supply, yet most of the PCMs are in powder, plate, or bulk rigid forms, difficult to adhere to the heat source or target substrates. Herein, PCMs coatings based on reactive poly(ethylene glycol) (RPEG) are developed for direct thermal energy exchange and storage. RPEG with highly reactive silanol groups is obtained by reaction of PEG with 3‐isocyanatopropyltriethoxysilane (IPTS), followed by hydrolyzation in weak acid. Cross‐linked PCMs coatings are obtained on various substrates, including cotton fabric, wood, tinplate, and even irregular objects. The coatings show obvious solid‐solid phase transition properties and high energy storage densities (142.8 J g−1). Multi‐walled carbon nanotubes (MWCNTs) are further doped into the coatings aided by a self‐cross‐linkable dispersant. The composite coatings exhibit excellent high‐temperature form stability and rapid thermal exchange properties owing to the formation of the cross‐linked network between RPEG and MWCNTs. Thermal regulation clothes are prepared by a spray coating method, which show no performance deterioration after washing three times, indicating good washing durability.

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“…In terms of PUAs, PUAs have a wide range of applications such as painting, coatings, adhesives, foams, textiles, membranes, packaging overcoat films, and biomedical materials, especially for oligomers. The wide application originates from its unique properties, including high solution, low melting viscosity, and three‐dimensional architectures . On one hand, UV‐curable polyurethane acrylate (PUA) represents a major trend due to concern about environmental impacts and low energy consumption; however, one major drawback is their polymerization shrinkage, which would lead to failure and shorten service life of photopolymerization materials .…”

Section: Introductionmentioning

confidence: 99%

Aqueous PUA emulsion prepared by dispersing polyurethane prepolymer in polyacrylate emulsion

Yuan

Wang

Cui

et al. 2015

J of Applied Polymer Sci

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Waterborne polyurethane/polyacrylate (PUA) emulsions were prepared by dispersing polyurethane (PU) prepolymer in polyacrylate (PA) emulsion; therefore, the PU particles formed in the presence of PA nanoparticles. The particle size and its distribution of the composite PUA emulsion were determined by dynamic light scattering. The result shows that the average particle size increases initially and then decreases with increasing PA content, which is confirmed by transmission electron microscope characterization. The surface properties of PUA films were analyzed by water contact angle and atomic force microscope topography. It indicates that the water contact angle and the average roughness of the composite PUA films are larger than those of the PU film. Meanwhile, mechanical properties test, scanning electron microscopy, and thermogravimetric analyses disclose that the PUA films are characterized by enhanced tensile strength, rough fractured surface, and good thermal stability. The preparation method proposed in this article is an effective and convenient way to manufacture composite PUA emulsion. The composite PUA emulsion can be potentially used in coatings.

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Preparation and properties of phase‐change heat‐storage UV curable polyurethane acrylate coating

Cited by 19 publications

References 24 publications

A First-Order Study of Reduced Energy Consumption via Increased Thermal Capacitance with Thermal Storage Management in a Micro-Building

A First-Order Study of Reduced Energy Consumption via Increased Thermal Capacitance with Thermal Storage Management in a Micro-Building

Ultra‐Stable Phase Change Coatings by Self‐Cross‐Linkable Reactive Poly(ethylene glycol) and MWCNTs

Aqueous PUA emulsion prepared by dispersing polyurethane prepolymer in polyacrylate emulsion

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