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제안 방법
- In this study, 5-ethylidene-2-norbornene (ENB) and ENB blended with a custom synthesized crosslinker are microencapsulated with an MUF polymer shell in a water medium using in-situ emulsion polymerization.
- Based on our preliminary work to evaluate the effect of such manufacturing parameters as reaction temperature, amount of emulsifier, and amount and ratio of reactants, optimal processing conditions have been determined and used in this work. The microcapsules are analyzed by means of optical and scanning electron microscopy to observe the capsule morphology and the MUF shell wall thickness.
- 2. Procedure to synthesize the melamine-urea-formaldehyde (MUF) microcapsules containing ENB and ENB+CL used in this study.
- In this work, ENB- and ENB+CL-filled microcapsules surrounded by a melamine-urea-formaldehyde (MUF) shell material were synthesized and evaluated using a series of different manufacturing parameters including reaction temperature, amount of emulsifier, and amount and ratio of reactants. In Figure 3, images from an optical microscope (OM) are shown for microcapsules produced by two different compositions of MUF reactants, increasing the relative amount of formaldehyde from 7.
- 5, are shown in Figure 4 for both the ENB and the ENB+CL core material. Based on preliminary experiments, optimum manufacturing parameters were determined and used to generate high quality MUF microcapsules containing ENB or ENB+CL core material. White and free flowing powder-like microcapsules formed with the MUF thermosetting polymer shell were obtained after drying and characterized in more details.
대상 데이터
- % in H2O (F) (Sigma-Aldrich, USA) to produce the MUF polymer shell in an aqueous solution. Sodium lauryl sulfate (SLS, Junsei, Japan) was used as an emulsifier, and poly(vinyl alcohol) (PVA, degree of polymerization=1500, degree of hydrolysis=99.0 mol%, Junsei, Japan) as a stabilizer.
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