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Liquid crystal epoxy resin with shape memory effect and preparation method and application thereof
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An epoxy resin, memory effect technology
Inactive Publication Date: 2012-06-20
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI +1
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[0005] In order to overcome the defects of poor mechanical properties and thermal properties of existing large-scale space shape memory components, the primary purpose of the present invention is to provide a liquid crystal epoxy resin with good mechanical properties and thermal properties and a shape memory effect
Method used
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Embodiment 1
[0037] A liquid crystal epoxy shape memory material prepared by the following method:
[0038] Heat and melt 100 parts of epoxy resin biphenol diglycidyl ether at 175°C, then add 20 parts of n-octylamine, mix well, and finally add 15 parts of 4,4'-diaminodiphenylmethane, melt and mix well ; Pour the resulting mixture into a preheated mold at 155°C, solidify at 170°C for 4 hours, then cure at 200°C for 2 hours, and then cool to 20°C to obtain a liquid crystal epoxy shape memory material;
[0039] Said parts are parts by weight.
[0040] The thermal response temperature of the liquid crystal epoxy shape memory material prepared in this embodiment is 90-140°C.
Embodiment 2
[0042] A liquid crystal epoxy shape memory material prepared by the following method:
[0043] Heat and melt 100 parts of epoxy resin (composed of bisphenoldiglycidyl ether and bisphenol A epoxy resin E-51 in a mass ratio of 1:2) at 16°C, and then add 1.22 parts of monohydric aliphatic amineEthylamine, mix well, and finally add 16 parts of 4,4'-diaminodiphenylmethane, melt and mix; pour the resulting mixture into a preheated mold at 140°C, solidify at 40°C for 8 hours, and then Curing for 0.5 hours, then cooling to 25°C to obtain a liquid crystal epoxy shape memory material;
[0044] Said parts are parts by weight.
[0045] The thermal response temperature range of the shape memory of the liquid crystal epoxy shape memory material prepared in this embodiment is 80-140°C.
Embodiment 3
[0047] A liquid crystal epoxy shape memory material prepared by the following method:
[0048] Heat and melt 100 parts of biphenol diglycidyl ether at 190°C, then add 42.59 parts of monohydric aliphatic amine n-hexadecylamine, mix well, and finally add 20 parts of 4,4'-diaminodiphenylmethane, Melting and mixing; pour the resulting mixture into a preheated mold at 170°C, solidify at 100°C for 6 hours, then solidify at 210°C for 1 hour, and then cool to 30°C to obtain a liquid crystal epoxy shape memory material;
[0049] Said parts are parts by weight.
[0050] The thermal response temperature range of the shape memory of the liquid crystal epoxy shape memory material prepared in this embodiment is 70-120°C.
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Abstract
The invention belongs to the field of material engineering and discloses a liquid crystalepoxy resin with a shape memory effect and a preparation method and application thereof. The preparation method of the liquid crystalepoxy resin with the shape memory effect comprises the following steps: heating to melt 100 parts of epoxy resin, adding 1.22-42.59 parts of unitary aliphatic amine, mixing uniformly, finally adding 10.57-26.20 parts of curing agent, and melting uniformly; pouring the obtained mixture into a preheating mould, heating to cure, and cooling to 20-30 DEG C to obtain the liquidcrystal epoxy shape memory material. The thermal response temperature of the liquid crystal epoxy resin with the shape memory effect can be adjusted conveniently, and the liquid crystal epoxy resin is short in thermal response time and high in shape recovery speed and still has the good shape memory effect after being subjected to repeated and circulatory shape memory.
Description
technical field [0001] The invention belongs to the field of material engineering, and in particular relates to a shape memory material, in particular to a liquid crystal epoxy resin with a shape memory effect and a preparation method and application thereof. Background technique [0002] In recent years, the introduction of mesogens into smart materials has become a hot spot in the field of materials research. In 2003, Patrick T. Mather et al. first synthesized and studied a thermosetting smectic C-type liquid crystal elastomer with shape memory effect. They heated this liquid crystal elastomer above the clearing point, and the smectic C-type multi-domain cross-linked system lost its smectic order. At this time, it was stretched and then cooled, and the stretched cross-linked system could maintain its smectic order. The stretched shape. When the system is heated above the clearing point again, the system will return to its original shape. Since the shape recovery tempera...
Claims
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Application Information
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