Method of preparing polymeric hollow microspheres by three-dimensional random flow field
A hollow microsphere and polymer technology, which is used in the field of polymer processing and molding, can solve the problems of uneven wall thickness, poor spheroidization of polymer hollow microspheres, and reduced mechanical properties, so as to improve sphericity and uniform wall thickness. properties, overcoming fixed orientation problems, reducing the effect of aspherical tendencies
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[0030] Example 1:
[0031] A method for preparing polymer hollow microspheres using a three-dimensional random flow field includes the following steps:
[0032] Step 1. Prepare a 0.05wt% polyacrylic acid aqueous solution and filter with a 5μm filter membrane to obtain W2 outer water phase solution; use PTFE material to process a threaded hemispherical container; add W2 outer water phase solution to the hemispherical container Medium; The size of the hemispherical container is 5cm in outer diameter, 3cm in inner diameter, and 1cm in wall thickness of the container;
[0033] Step 2. Dissolve poly-αmethylstyrene in fluorobenzene to prepare 12wt% O oil phase solution; use distilled water as W1 internal water phase, and use microfluidic technology to produce W1 internal water phase / O oil phase / W2 external phase Water phase double compound milk particles;
[0034] Step 3. Use the hemispherical container containing the W2 outer water phase solution to collect the double composite milk parti...
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[0037] Example 2:
[0038] A method for preparing polymer hollow microspheres using a three-dimensional random flow field includes the following steps:
[0039] Step 1. Prepare 1wt% polyacrylic acid aqueous solution and filter with 5μm membrane to obtain W2 outer water phase solution; use PTFE material to process threaded hemispherical container; add W2 outer water phase solution to the hemispherical container ; The size of the hemispherical container is 6cm in outer diameter, 4cm in inner diameter, and 1cm in wall thickness of the container;
[0040] Step 2: Dissolve polystyrene in toluene to prepare 15wt% O oil phase solution; use distilled water as W1 internal water phase, and use microfluidic technology to produce W1 internal water phase / O oil phase / W2 external water phase dual composite Milk particles
[0041] Step 3. Use the hemispherical container containing the W2 outer water phase solution to collect the double composite milk particles, and screw the two hemispherical contai...
Example Embodiment
[0044] Example 3:
[0045] A method for preparing polymer hollow microspheres using a three-dimensional random flow field includes the following steps:
[0046] Step 1. Prepare 1.5wt% polyvinyl alcohol aqueous solution, filter with 5μm membrane to obtain W2 outer water phase solution; use PTFE material to process threaded hemispherical container; add W2 outer water phase solution to hemisphere In the device
[0047] Step 2: Dissolve deuterated polystyrene in 1,2-dichloroethane to prepare a 10wt% O oil phase solution; use distilled water as the W1 internal water phase, and use microfluidic technology to produce W1 internal water / O Oil phase / W2 outer water phase dual composite emulsion particles;
[0048] Step 3. Use the hemispherical container containing the W2 outer water phase solution to collect the double composite milk particles, and screw the two hemispherical containers tightly to form a spherical container that encapsulates the W2 outer water phase and the double composite mil...
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