Preparation and properties of hollow glass microsphere-filled epoxy-matrix composites

Yung, Kam Chuen; Zhu, B.L.; Yue, Tai Man; Xie, Changsheng

doi:10.1016/j.compscitech.2008.10.014

Cited by 224 publications

(99 citation statements)

References 28 publications

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“…In Table 2, l e value of neat epoxy (sample E-0) is about 0.405 W/(m K) which is close to the reported data [35]. On the other hand, the results show that the l e value of the composite increased with the increasing of filler volume fraction.…”

Section: Effective Thermal Conductivity Of Compositessupporting

confidence: 78%

“…For example, Yung et al [35] had studied the effects of contents on the thermal conductivity of hollow glass beadfilled epoxy composites: it is concluded that the properties of these composites are improved expect for the decrease in thermal conductivity. However, few literatures focus on the thermal conductivity of three-component composite materials containing core-shell microPCMs randomly distributed in a continuous matrix because of its complex phase change behavior and thermal transmission process.…”

Section: Analysis Of Relative Thermal Conductivitymentioning

confidence: 99%

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Thermal conductivity of microPCMs-filled epoxy matrix composites

Wang

Huang

et al. 2011

Colloid Polym Sci

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Microencapsulated phase change materials (microPCMs) have been widely applied in solid matrix as thermal-storage or temperature-controlling functional composites. The thermal conductivity of these microPCMs/ matrix composites is an important property need to be considered. In this study, a series of microPCMs have been fabricated using the in situ polymerization with various core/shell ratio and average diameter; the thermal conductivity of microPCMs/epoxy composites were investigated in details. The results show that the microPCMs have smooth surface and regular global shape with compact methanolmelamine-formaldehyde shell. The shell thickness does not greatly influence the phase change behaviors of PCM. Moreover, smaller microPCMs embedded in epoxy can improve the thermal transmission ability of composites. The effect of thermal conductivity of composites can be improved with higher volume fraction (10-30%) of microPCMs; and smaller size microPCMs with the same content of PCM may also enhance the thermal transmission area in matrix. Modeling analysis of relative thermal conductivity indicates that mixing higher thermal conductivity additive in PCM or matrix is an appropriate method to improve the thermal conductivity of microPCMs/matrix composites.

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Section: Effective Thermal Conductivity Of Compositessupporting

confidence: 78%

Section: Analysis Of Relative Thermal Conductivitymentioning

confidence: 99%

Thermal conductivity of microPCMs-filled epoxy matrix composites

Wang

Huang

et al. 2011

Colloid Polym Sci

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“…Although similar effects are also expected in syntactic foams due to the presence of ceramic microballoons, currently the published literature is severely lacking in understanding the relations between CTE of syntactic foams and material parameters such as volume fraction, wall thickness, and properties of particles. CTE of glass microballoon (GMB)/epoxy syntactic foams is found explored in two previous studies where up to 2 wt% [5] and 51.3 vol% [20] addition of GMBs reduced the CTE of epoxy by 5 and 54.3 %, respectively. However, despite indicating that GMBs will reduce the CTE of composites, these experimental studies are limited to studying only a few material compositions in a narrow range and do not provide general understanding between CTE and various material parameters.…”

Section: Introductionmentioning

confidence: 98%

Thermal expansion behavior of hollow glass particle/vinyl ester composites

2012

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Ceramic particle-reinforced composites have better dimensional stability than the matrix polymer at high temperatures. In hollow-particle filled composites (syntactic foams), the coefficient of thermal expansion (CTE) can be controlled by two parameters simultaneously: wall thickness and volume fraction of particles, which are explored in this study. The CTE was experimentally measured to be up to 60.4 % lower than the matrix material with the addition of glass microballoons for the twelve compositions of syntactic foams characterized using a thermomechanical analyzer. The CTE values have a stronger dependence on particle volume fraction than the wall thickness within the range of parameters explored. The experimental trends are analyzed by using Turner's and Kerner's models modified for syntactic foams. The results from the modified Turner's model show close correlation with the experimental values with a maximum difference of ±15 %. Parametric studies show that syntactic foams of a wide range of densities can be tailored to obtain the same CTE value. The experimental and theoretical results are helpful in developing syntactic foams with desired properties for thermal applications.

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“…The most widely used polymers are thermoset resins such as epoxy resin. Studies that utilize epoxy resin as the matrix can be found in several works [22][23] and these studies put more focuses on the use of glass hollow microspheres as the dispersed phase [22]. Besides that, most published studies also used and investigated various processing techniques in the production of syntactic foams [24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

“…These materials were combined together using a simple casting technique. The developed EHoS were produced in-house, thus it would provide different approach in the production of syntactic foam compared to previously studied syntactic foams which usually utilized hollow spheres manufactured by established industries [23,[35][36][37]. Because the matrix and hollow sphere were made from the same materials, the high possibility of achieving good compatibility in the system is an added advantage.…”

Section: Introductionmentioning

confidence: 99%

Development and characterization of epoxy syntactic foam filled with epoxy hollow spheres

Samsudin¹,

Ariff²,

Zakaria³

et al. 2011

Express Polym. Lett.

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Abstract. The present study focuses on the development and characterization of epoxy syntactic foam filled with epoxy hollow spheres (ESF/EHoS). The epoxy syntactic foam (ESF) was produced by embedding epoxy hollow spheres (EHoS) into a mixture of epoxy-hardener and 3% KOH solution. An innovative approach and simple procedure was implemented in the preparation of the EHoS where expanded polystyrene (EPS) beads were used as initiation material. The EPS beads were coated with the epoxy resin and these coated EPS beads were later cured and post-cured at high temperature which will also shrink the EPS beads thus producing a hollow structure. The physical and compressive properties of the developed ESF were characterized. The progressive collapse of the syntactic foam was monitored in real-time with respect to percentage of strain during a compression test. Results also indicated that the (ESF/EHoS) showed similar deformation pattern with other types of syntactic foams which exhibited the common three regions of deformations.

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Preparation and properties of hollow glass microsphere-filled epoxy-matrix composites

Cited by 224 publications

References 28 publications

Thermal conductivity of microPCMs-filled epoxy matrix composites

Thermal conductivity of microPCMs-filled epoxy matrix composites

Thermal expansion behavior of hollow glass particle/vinyl ester composites

Development and characterization of epoxy syntactic foam filled with epoxy hollow spheres

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