A New Method to Synthesize Microcapsule and Its Application in Controllable Photodegradation of Polymers

Yu, Fei; Liu, Yan-Ping; Shu-ren, Yao

doi:10.1295/polymj.34.302

Cited by 6 publications

(3 citation statements)

References 8 publications

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“…In addition, the degradation degree of the MEMC agents decreased after encapsulation of PLA resin on its surface, which was resulted from the improved thermal stability compared with that of the EMC. This was beneficial for the application of EMC in the matrices, such as plastics and rubber composites, which requires higher operating temperature 16–18…”

Section: Resultsmentioning

confidence: 99%

“…This was beneficial for the application of EMC in the matrices, such as plastics and rubber composites, which requires higher operating temperature. [16][17][18] Analysis of Influencing Parameters on the Particle Size of MEMC Effect of PLA Concentration on the Particle Size. The effect of PLA concentration was found to have a major influence on the final particle diameter ( Figure 5).…”

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confidence: 99%

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Preparation and characterization of ethyl menthane carboxamide microcapsules using PLA

Wang¹,

Dong²

2012

J of Applied Polymer Sci

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Using polylactic acid (PLA) as wall and ethyl menthane carboxamide (EMC) as core substance, microencapsulated EMC (MEMC) agents were prepared based on solvent evaporation method. The structure and morphology of MEMC were analyzed by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and laser particle size analyzer. The MEMC agents had a mean diameter of about 10-20 lm. Moreover, the thermal properties of the MEMC agents were measured by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The melting point and thermal stability were improved due to the encapsulation of PLA resin. In addition, polyvinyl alcohol (PVA) and PLA concentration, stirring rate, and oil/water ratio were investigated for their effects on the particle size. As demonstrated by experimental results, the diameters of the microcapsules decreased with increasing stirring rate and oil/water ratio, and increased with increasing PLA concentration.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Preparation and characterization of ethyl menthane carboxamide microcapsules using PLA

Wang¹,

Dong²

2012

J of Applied Polymer Sci

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“…Self-healing microcapsule is realized through mechanically cracking the microcapsule shell to allow the core ingredients to stream out and adhere to the deformation or fracture in buildings [16]. Such idea is also utilized to achieve photodegradation function by microencapsulation [17].…”

Section: Introductionmentioning

confidence: 99%

Interfacial Polycondensation Synthesis of Optically Sensitive Polyurea Microcapsule

Liu

et al. 2014

Journal of Chemistry

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TMPTA prepolymer resin and photoinitiators of ITX/TPO had been encapsulated in core-shell structured microcapsules as optical responding ingredients based on interfacial polycondensation method, and polyurea structured microcapsule shell had been formed on the sheared O/W interface. The synthesized microcapsule had regular core-shell structure with the diameter of about 0.455 μm and shell thickness of about 40 nm. UV-visible absorption spectra indicated that the encapsulated ITX and TPO photoinitiators could efficiently absorb UV irradiation. Under exposure, the C=C bonds absorbance of the microencapsulated TMPTA decreased rapidly and then nearly unchanged during further exposure after 30 s. This implied that the optical response was achieved by C=C bond cleavage of TMPTA monomer initiated by the photoinitiator radicals, to form network polymers in microcapsules. The relative crosslinking rate was about 50%. Due to core polymer formation, the thermal phase change temperature of exposed microcapsules was narrowed and ranged from 105 to 205°C, compared with that from 125 to 260°C of unexposed microcapsules. Furthermore, the image density decrease at longer irradiation time had also verified the optical responding function of the synthesized microcapsules in macroscopic viewpoint.

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Polymer Photochemistry

Allen¹

2007

Photochemistry

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A New Method to Synthesize Microcapsule and Its Application in Controllable Photodegradation of Polymers

Cited by 6 publications

References 8 publications

Preparation and characterization of ethyl menthane carboxamide microcapsules using PLA

Preparation and characterization of ethyl menthane carboxamide microcapsules using PLA

Interfacial Polycondensation Synthesis of Optically Sensitive Polyurea Microcapsule

Polymer Photochemistry

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