Microchannel constituted of hydrophilic silicone resin
A technology made of silicone and resin, used in the field of microchannels, can solve the problems of inability to supply sufficient oxygen through channels, low oxygen permeability of substrates, and inability to obtain channels.
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Embodiment 1
[0092] (Synthesis of Macromonomer A)
[0093] 46 g of KF-6001 (manufactured by Shin-Etsu Chemical Co., Ltd.), 133 g of octamethylcyclotetrasiloxane, 28 g of 1,3,5-trimethyltrifluoropropylcyclotrisiloxane, 6.5 g of 1,3,5,7-tetramethylcyclotetrasiloxane, 234 g of chloroform, and 1.9 g of trifluoromethanesulfonic acid were reacted at 40° C. for 15 hours.
[0094] Then, after neutralizing by absorbing acid with diatomaceous earth, and purifying by distillation under reduced pressure, it was dissolved in 191 g of isopropanol, and mixed with 40.8 g of PKA- 5007 (manufactured by NOF Corporation) was used for hydrosilylation reaction. After repeatedly dissolving and washing the obtained reaction solution in an 80% methanol aqueous solution, the solvent was distilled off to obtain 136 g of siloxane diol having hydroxyl groups at both terminals. As a result of NMR (nuclear magnetic resonance spectrum) analysis of the obtained siloxane diol, the structure represented by the following f...
Embodiment 2 and Embodiment 3
[0105] To 90 parts by weight of the siloxane macromonomer containing urethane methacrylate group represented by the above formula (macromonomer A), 10 parts by weight of hydroxyethyl methacrylate (hereinafter referred to as HEMA ) or methacrylic acid (hereinafter referred to as MAA), and 0.5 parts by weight of D1173, and after preparing the composition in the same manner as in Example 1, its appearance was confirmed. Then, it was cured in the same manner as in Example 1 to obtain a transparent crosslinked body. The oxygen permeability coefficient, mechanical properties, and liquid contact angle of the obtained cured film were measured. Furthermore, after producing microchannels by the same curing method, bubble detachment properties were evaluated. The above results are shown in Table 1.
Embodiment 4 and Embodiment 5
[0107] (Synthesis of Macromonomer B)
[0108] 38.6 g of X-22-164 (manufactured by Shin-Etsu Chemical Co., Ltd.), 629 g of octamethylcyclotetrasiloxane, 36 g of 1,3,5,7-tetramethylcyclotetrasiloxane, 1.4 g trifluoromethanesulfonic acid, and the reaction was carried out at room temperature for 6 hours.
[0109] Then, after utilizing diatomaceous earth to absorb acid and carry out neutralization, after utilizing reduced pressure distillation to carry out purification, make it dissolve in the isopropanol of 300g, and in the presence of 0.7g platinum catalyst and the PKA-5007 of 409g (Japan Oils and Fats Co., Ltd.) for hydrosilylation reaction. After repeatedly dissolving and washing the obtained reaction solution with 80% acetone aqueous solution, 0.012 g of BHT and 0.006 g of MQ were added, and the solvent was distilled off to obtain 706 g of a siloxane macromolecule having methacrylate groups at both ends monomer. As a result of NMR (nuclear magnetic resonance spectrum) analy...
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