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CN-122011679-A - Fiberboard material and preparation method thereof

CN122011679ACN 122011679 ACN122011679 ACN 122011679ACN-122011679-A

Abstract

The invention relates to the technical field of high polymer materials, and discloses a fiber board material and a preparation method thereof, wherein the preparation method comprises the following steps: adding epoxy resin, epoxy flame retardant and cardanol modified polyphenylene sulfide into a mixer, stirring for 30-40min at 40-50 ℃, then adding esterified straw, continuing stirring for 20-30min to obtain premix, adding phenolic amine curing agent into the premix, rapidly stirring for 3-5min, paving on a die, hot-pressing for 20-30min at 8-15MPa and 100-120 ℃, forming, cooling, and demoulding to obtain the fiber board material. The fiber board material prepared by the invention has good water resistance, stain resistance, oil resistance and flame retardance.

Inventors

  • ZHANG XIAOFEI
  • SUN HUAZHONG

Assignees

  • 淮安安沙美新材料有限公司

Dates

Publication Date
20260512
Application Date
20260320

Claims (10)

  1. 1. The fiber board material is characterized by comprising, by weight, 20-25 parts of epoxy resin, 10-12 parts of esterified straws, 3-5 parts of epoxy-based flame retardant, 1-2 parts of cardanol modified polyphenylene sulfide and 6-8 parts of phenolic amine curing agent; The epoxy flame retardant is prepared by reacting triglycidyl isocyanurate with 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide; The cardanol modified polyphenylene sulfide is prepared by reacting cardanol with 1, 2-epoxy-5-hexene to obtain alkenyl modified cardanol, reacting the subsequent alkenyl modified cardanol with 1, 3-tetramethyl disiloxane, and reacting the subsequent alkenyl modified cardanol with chloromethylated polyphenylene sulfide fibers.
  2. 2. The fiber board material according to claim 1, wherein the preparation method of the esterified straw comprises the steps of sequentially adding straw, deionized water, sodium hydroxide and chloroacetic acid into a reactor, controlling the pH to 9-10, reacting for 10-12 hours at 80-90 ℃, after the reaction is finished, carrying out suction filtration, washing to be neutral, and drying for 4-6 hours at 50-60 ℃ to obtain the esterified straw.
  3. 3. The fiber board material according to claim 2, wherein the dosage ratio of straw, deionized water, sodium hydroxide, chloroacetic acid is 1-1.1g:20-22ml:0.18-0.19g:0.42-0.46g.
  4. 4. The fiber board material according to claim 1, wherein the epoxy-based flame retardant is prepared by adding triglycidyl isocyanurate into a reactor, stirring and melting at 110-120 ℃, then slowly adding 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and xylene solution into the reactor within 1-2h, heating to 140-150 ℃, stirring and reacting for 6-8h, cooling to room temperature after the reaction is finished, filtering, washing and drying to obtain the epoxy-based flame retardant.
  5. 5. The fiber board material according to claim 4, wherein the usage ratio of triglycidyl isocyanurate, 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and xylene is 11.9-12g:8.8-8.9g:50-60mL.
  6. 6. The fiber board material according to claim 1, wherein the preparation method of the cardanol modified polyphenylene sulfide comprises the following steps: Adding cardanol, triethylbenzyl ammonium chloride and 4-methoxyphenol into a reactor, stirring and heating to 80-90 ℃, then slowly dropwise adding 1, 2-epoxy-5-hexene into the reactor, heating to 100-110 ℃ after the dropwise adding is finished, reacting for 6-8 hours, and performing reduced pressure distillation, washing and drying to obtain alkenyl modified cardanol; Adding 1, 3-tetramethyl disiloxane into a toluene solvent under the protection of nitrogen, stirring and heating to 80-90 ℃, then dropwise adding a Karster catalyst, adding alkenyl modified cardanol into the mixture after dropwise adding, carrying out heat preservation and stirring for reaction for 60-80min, cooling to room temperature after the reaction is finished, carrying out reduced pressure distillation, purifying, and drying to obtain silane modified cardanol; Adding chloromethylated polyphenylene sulfide fiber and silane modified cardanol into N, N-dimethylformamide solvent, stirring and mixing, then adding potassium carbonate and sodium iodide, reacting for 36-40h at 90-100 ℃, cooling to room temperature after the reaction is finished, precipitating, filtering, flushing a filter cake with deionized water for 3-4 times, then placing the filter cake into a Soxhlet extractor, heating to 85-95 ℃ by using absolute ethyl alcohol as an extraction solvent, extracting for 16-20h, and finally vacuum drying for 8-12h at 60-80 ℃ to obtain cardanol modified polyphenylene sulfide.
  7. 7. The fiber board material according to claim 6, wherein the dosage ratio of cardanol, triethylbenzyl ammonium chloride, 4-methoxyphenol, 1, 2-epoxy-5-hexene in the first step is 10-10.1g:0.1-0.12g:0.01-0.02g:4.8-4.9g.
  8. 8. The fiber board material according to claim 6, wherein the dosage ratio of toluene, 1, 3-tetramethyl disiloxane, the cassiterite catalyst, the alkenylated modified cardanol in the step (ii) is 15-20ml:2.7-2.8g:0.05-0.06ml:3.2-3.3g.
  9. 9. The fiber board material according to claim 6, wherein the dosage ratio of N, N-dimethylformamide, chloromethylated polyphenylene sulfide fiber, silane modified cardanol, potassium carbonate, sodium iodide in the third step is 25-30mL:1.5-1.6g:1.8-1.9g:1.4-1.5g:0.12-0.14g.
  10. 10. The method for preparing the fiber board material according to any one of claims 1 to 9, wherein the preparation method comprises the steps of adding epoxy resin, an epoxy-based flame retardant and cardanol modified polyphenylene sulfide into a mixer, stirring for 30 to 40 minutes at a temperature of between 40 and 50 ℃, then adding esterified straws, continuing stirring for 20 to 30 minutes to obtain a premix, adding a phenolic amine curing agent into the premix, rapidly stirring for 3 to 5 minutes, paving on a die, hot-pressing for 20 to 30 minutes at a temperature of between 8 and 15MPa, cooling, and demoulding to obtain the fiber board material.

Description

Fiberboard material and preparation method thereof Technical Field The invention relates to the technical field of high polymer materials, in particular to a fiber board material and a preparation method thereof. Background The polymer composite board is widely applied in a plurality of fields such as construction, furniture manufacturing and the like, has the characteristics of flexible raw material design, adjustable performance and the like, is prepared by taking agriculture and forestry biomass such as straw and the like as a filler, is an important way for realizing high-value utilization of agriculture and forestry waste and relieving shortage of wood resources, and has the characteristics of uniform material, stable structure and the like when being used as a common product of the composite board, but has some defects in the use process. In terms of water resistance, the common fiberboard taking the straw as the raw material is easy to absorb water because the straw is rich in hydrophilic hydroxyl groups, has poor interfacial compatibility with a resin matrix and is easy to form a micro-gap inside the board, and the board can expand and deform after absorbing water, so that the appearance of the board is affected, and the strength and the service life of the board are reduced. When the plate is in a humid environment for a long time, the invasion of water can destroy the fiber structure inside the plate, and simultaneously, the mechanical properties such as static bending strength, internal bonding strength and the like of the plate can be greatly reduced, so that the reliability and stability of the plate in practical application are affected. In the aspects of stain resistance and oil resistance, the surface of the traditional fiber board is easy to be attached by stains and greasy dirt, and is difficult to clean, so that the attractiveness of the board is affected, and the performance of the board is also possibly adversely affected. In the aspect of flame retardance, the flame retardance of many fiber boards is poor, when emergency situations such as fire disaster are met, common fiber boards are easy to burn, a large amount of smoke and toxic gas can be generated in the burning process, and the life safety of personnel is seriously threatened. In summary, the existing fiber board material has obvious defects in water resistance, pollution resistance, oil resistance and flame retardance, and cannot meet the requirements of application scenes with higher requirements on board performance. Therefore, the development of a fiber board material with good water resistance, pollution resistance, oil resistance and flame retardance is of great practical significance. Disclosure of Invention In order to overcome the defects of the prior art, the invention aims to provide a fiber board material and a preparation method thereof, and the fiber board material prepared by the method has good water resistance, pollution resistance, oil resistance and flame retardance. In order to achieve the aim, the invention provides the following technical scheme that the fiber board material comprises, by weight, 20-25 parts of epoxy resin, 10-12 parts of esterified straws, 3-5 parts of epoxy-based flame retardant, 1-2 parts of cardanol modified polyphenylene sulfide and 6-8 parts of phenolic amine curing agent; The epoxy flame retardant is prepared by reacting triglycidyl isocyanurate with 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide; The cardanol modified polyphenylene sulfide is prepared by reacting cardanol with 1, 2-epoxy-5-hexene to obtain alkenyl modified cardanol, reacting the subsequent alkenyl modified cardanol with 1, 3-tetramethyl disiloxane, and reacting the subsequent alkenyl modified cardanol with chloromethylated polyphenylene sulfide fibers. Further, the preparation method of the esterified straw comprises the steps of sequentially adding straw, deionized water, sodium hydroxide and chloroacetic acid into a reactor, controlling the pH to 9-10, reacting for 10-12 hours at 80-90 ℃, filtering after the reaction is finished, washing to be neutral, and drying for 4-6 hours at 50-60 ℃ to obtain the esterified straw. Further, the dosage ratio of the straw to the deionized water to the sodium hydroxide to the chloroacetic acid is 1-1.1g to 20-22mL to 0.18-0.19g to 0.42-0.46g. In the above steps, the addition of sodium hydroxide provides a strongly alkaline environment, which activates hydroxyl groups on the surface of the straw into oxyanions, and then the added chloroacetic acid and the activated oxyanions undergo a bimolecular nucleophilic substitution reaction, and the chlorine atoms are taken as leaving groups to fall off, so that carbon chains containing carboxyl groups are grafted on the surface of the straw, and esterified straw is obtained. Further, the preparation method of the epoxy flame retardant comprises the steps of adding triglycidyl isocyanurate into a reactor, stirring and melting at 110-12