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A kind of biomass modified thermosetting resin and preparation method thereof

A thermosetting, biomass technology, applied in the field of cyclodextrin-based biomass-modified thermosetting resin and its preparation, can solve the problems of reducing the thermal stability of the resin, research blank, unfavorable to reduce the dielectric constant of the resin, etc. The effect of dielectric constant, accelerated curing reaction, excellent thermal stability

Inactive Publication Date: 2016-01-27
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First, the initial thermal degradation temperature of cyclodextrin is close to the curing and post-treatment temperature of heat-resistant thermosetting resin, so adding cyclodextrin directly to heat-resistant thermosetting resin will reduce the thermal stability of the resin
Second, the cyclodextrin molecule has a large number of hydroxyl groups and has strong polarity, which is not conducive to reducing the dielectric constant of the resin
However, research in this direction is still blank

Method used

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  • A kind of biomass modified thermosetting resin and preparation method thereof
  • A kind of biomass modified thermosetting resin and preparation method thereof
  • A kind of biomass modified thermosetting resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Preparation of cyclodextrin reaction solution

[0035] At 30°C, dissolve 0.005mol β-cyclodextrin in 10mL of 10mol / L sodium hydroxide solution to obtain a cyclodextrin solution; add 0.075mol epichlorohydrin dropwise to the cyclodextrin solution, and then Stir at ℃ for 1.5 hours to obtain a cyclodextrin reaction liquid.

[0036] 2. Preparation of cyclodextrin microspheres

[0037] At 30°C, add 60mL of kerosene and 0.0028mol of mixed emulsifier (by mass ratio, Span80:Tween80 is 3:1) to the cyclodextrin reaction liquid obtained in step 1, then raise the temperature to 50°C and keep it warm for 7 hours; After the reaction is finished, wash, filter with suction, and remove the solvent to obtain cyclodextrin microspheres. Its infrared spectrum, X-ray diffraction spectrum, scanning electron microscope, particle size distribution diagram, thermogravimetric curve, dielectric constant versus frequency variation diagram, and dielectric loss versus frequency variation diagram a...

Embodiment 2

[0049] 1. Preparation of cyclodextrin microspheres / cyanate ester-epoxy resin

[0050] According to the mass ratio, add 20g of bisphenol A epoxy resin (brand E-51), 80g of bisphenol A cyanate and 5g of cyclodextrin microspheres prepared in Example 1 into a beaker, and stir at 140°C After the resin is completely melted, take a sample and record it as a prepolymer. After continuing to heat for 3 hours, a uniform mixture is obtained; pour the mixture into a mold, and vacuum defoam for 30min. / 2h and 240°C / 4h processes for thermal curing to obtain cyclodextrin microspheres / cyanate-epoxy resin. The differential scanning calorimetry curve of the prepolymer and the thermogravity curve, dielectric constant-frequency curve and dielectric loss-frequency curve of the cured resin are respectively shown in the attached Figure 8 , 9 , 10, 11.

[0051] 2. Preparation of comparative examples

[0052] Add 20g of epoxy resin (grade E-51) and 80g of bisphenol A cyanate into a beaker, stir at...

Embodiment 3

[0059] 1. Preparation of cyclodextrin reaction solution

[0060] At 25°C, dissolve 1mol α-cyclodextrin in 1.8L of 10mol / L potassium hydroxide solution to obtain a cyclodextrin solution; add 16mol epichlorohydrin dropwise to the cyclodextrin solution, The mixture was stirred for 1 hour to obtain a cyclodextrin reaction liquid.

[0061] 2. Preparation of cyclodextrin microspheres

[0062] At 25°C, add 12L kerosene and 0.6mol mixed emulsifier (by mass ratio, Span80:Tween80 is 10:3) to the cyclodextrin reaction liquid obtained in step 1, then raise the temperature to 60°C and keep it warm for 8 hours; After the reaction is finished, wash, filter with suction, and remove the solvent to obtain cyclodextrin microspheres.

[0063] 3. Preparation of cyclodextrin microspheres / cyanate-epoxy resin

[0064] According to the mass ratio, add 20g of bisphenol A epoxy resin (brand E-51), 80g of bisphenol A cyanate and 8g of cyclodextrin microspheres obtained in step 2 into a beaker, and sti...

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Abstract

The invention relates to biomass modified thermosetting resin and a preparation method thereof. The biomass modified thermosetting resin is prepared by uniformly mixing 100 parts of molten thermo-settable resin and 1-10 parts of cyclodextrin microsphere by mass, and curing to obtain the biomass modified thermosetting resin. The cyclodextrin microsphere is prepared by polymerizing an epoxy chloropropane modified cyclodextrin inverse emulsion, not only has excellent heat stability and low polar group number, but also is low in grain size and is favorable for improving a modification effect with relatively low content. The biomass modified thermosetting resin has the characteristics of low dielectric constant and excellent heat stability; because the cyclodextrin microsphere has an active group on the surface thereof, curing of the thermosetting resin as well as control on dielectric property and heat stability of the modified thermosetting resin can be promoted through regulating content of the cyclodextrin microsphere. The preparation method is simple and easy to implement, high in safety and low in cost; all reagents are low-toxicity or non-toxic substances; the method is applicable to application on a large scale.

Description

technical field [0001] The invention relates to a thermosetting resin and a preparation method thereof, in particular to a cyclodextrin-based biomass-modified thermosetting resin and a preparation method thereof. technical background [0002] In recent years, with the rapid development of the electronic information industry, finding and developing new low dielectric constant materials has become the key to the research and development of new products and technologies. An effective way to prepare low dielectric constant materials is to introduce porous materials into polymers, thereby reducing the dielectric constant of polymers. [0003] It is worth mentioning that due to the urgent requirements of sustainable development and environmental protection, the research on biomass materials known for their green environmental protection has become a hot spot in the research and development of new materials. The so-called biomass materials refer to new materials processed and prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L79/04C08L79/08C08L5/08C08G59/40C08B37/16
Inventor 顾嫒娟唐燕南梁国正袁莉
Owner SUZHOU UNIV