• 专利附录
  • 专利说明
  • 权利要求
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    • 专利摘要:
    The present disclosure provides a thermal insulation and fireproof material and a preparation method thereof. The thermal—insulation fireproof material is prepared from the following raw materials: 20—30 parts by weight of tannin 5 extract solution, 10—20 parts by weight of furfuryl alcohol, 5—lO parts by weight of 37% (w/w) formaldehyde, 10—20 parts by weight of 65% (w/w) p—toluenesulfonic acid solution, 1— 5 parts by weight of Tween—80, and 5—30 parts by weight of water. The thermal—insulation and fireproof material of the 10 present disclosure has remarkable thermal insulation and fireproof effects and low cost.
    公开号:NL2026915A
    申请号:NL2026915
    申请日:2020-11-17
    公开日:2020-12-22
    发明作者:Zhou Xiaojian；Du Guanben；Li Jinxing；Liao Jingjing；Zhang Jun；Li Taohong；Ou Nianhua
    申请人:Univ Southwest Forestry；
    IPC主号:
    专利说明:

    THERMAL INSULATION AND FIREPROOF MATERIAL ANDPREPARATION THEREOF
    TECHNICAL FIELD The present disclosure relates to the field of materials, and in particular to a thermal insulation and fireproof material and a preparation method thereof.
    BACKGROUND With the implementation of low-carbon, energy-saving and safety policies and the improvement of consumer awareness, people attach more attention to thermal insulation and fireproof properties of materials. Polyurethane (PU) foam, polystyrene foam (EPS) and phenolic resin foam (PF) materials are important thermal insulation and fireproof materials in the field of construction and home appliances. Although polyurethane foam has excellent thermal insulation properties, it is expensive and flammable and releases highly toxic gases after burning, which has sounded the alarm time and time again. EPS board has high strength, excellent transparency, rigidity and chemical resistance, and moderate price, so it has always been favored by consumers, but it has defects such as flammability, high specificity, high thermal conductivity and proneness to stress cracking. PF has excellent thermal insulation properties, high flame retardancy, no melting, no dripping, low smoke density, stable chemical properties and other advantages under fire conditions. It is widely used as thermal insulation, sound insulating and flame retardant materials in the construction and automobile industries, but the cost is too high. One of the common points of the above foams is that raw materials are all derived from petrochemical derivatives. China is a country where per capita petrochemical resources are relatively scarce. Coupled with the impact of frequent fluctuations in the price of petrochemical products, thermal insulation and fireproof materials are in urgent need of upgrading. Therefore, effective use of biomass resources to gradually replace petrochemical products is inevitable.
    At present, it is reported that tannin-based biomass foam materials are prepared by using the structural similarity of tannin to phenol. The performance indexes of tannin-based biomass foam are systematically analyzed, and it is concluded that tannin-based foam materials have advantages of both polyurethane foam and phenolic resin foam, and the raw materials come from biomass. Throughout the synthesis process of the tannin-based biomass foam, biomass raw materials account for more than 95% of the total raw materials. However, the foam material has the characteristics of high brittleness and severe slag drop, so as not to be used directly in the field of thermal insulation and fire protection. The foam material can only be used after surface coating and veneering treatment.
    SUMMARY The present disclosure provides a thermal insulation and fireproof material with remarkable thermal insulation and fireproof effects and low cost.
    The present disclosure provides a thermal insulation and fireproof material, which is prepared from the following raw materials: 20-30 parts by weight of tannin extract solution {solvent is water), 10-20 parts by weight of furfuryl alcohol, 5-10 parts by weight of 37% (w/w) formaldehyde, 10- 20 parts by weight of 65% (w/w) p-toluenesulfonic acid solution, 1-5 parts by weight of Tween-80, and 5-30 parts by weight of water.
    The above thermal insulation and fireproof material is preferably prepared from the following raw materials: 30 parts by weight of tannin extract solution, 13 parts by weight of furfuryl alcohol, 7.4 parts by weight of 37% (w/w) formaldehyde, 15 parts by weight of 65% (w/w) p-
    toluenesulfonic acid solution, 3 parts by weight of Tween- 80, and 5 parts by weight of water.
    In the above thermal insulation and fireproof material, the tannin extract solution has a mass concentration of 40- 55%, a pH value of 4.0-6.0, and a tannin content of not less than 60%.
    In the above thermal insulation and fireproof material, cast molding is performed at one time with a resin foam layer and a solid resin layer.
    The present disclosure further provides a method for preparing the above-mentioned thermal insulation and fireproof material, which is prepared according to the following steps: 1): adding water, furfuryl alcohol, formaldehyde and p- toluenesulfonic acid solution to the tannin extract solution, stirring well and letting stand for 3-5 min to obtain a solution A, where: the solution A is ensured to be at pH < 2, because only under strong acid conditions, a subsequent solution Al can be quickly cured; in addition, under strongly acidic conditions, it is easy to foam after rapid stirring after adding Tween-80 to a subsequent solution AZ; 2): dividing the solution A into a first part Al and a second part A2, and pouring the first part Al into a forming mold; 3): adding Tween-80 to the second part A2, stirring for 5-10 min, and controlling stirring speed at 1,000-2,000 r/min to completely foam the solution and obtain a foam; 4): pouring the foam into the upper layer of the forming mold, stirring for 1-2 min, and controlling stirring speed at 50-100 r/min, so that the foam is smoothly and evenly spread on the upper layer of the forming mold; 5): letting the foam stand to achieve pre-curing and immobilization of both resin and foam; 6): transferring the forming mold to an oven at 60-80°C and drying for 8-12 h, and completely curing to obtain the thermal insulation and fireproof material.
    In the present disclosure, during the foam preparation, the tannin extract solution and the furfuryl alcohol are used as matrix resin, and under the action of formaldehyde as a cross-linking agent, the main component tannin in the tannin extract solution and formaldehyde undergo cross- linking polycondensation reaction. Furfuryl alcohol not only reacts with formaldehyde and tannins, and but also undergoes self-polycondensation, rapidly forming tannin/furan resin, and the resin is cured in the presence of strong acid (p- toluenesulfonic acid).
    The present disclosure has the following beneficial effects: The thermal insulation and fireproof material of the present disclosure has remarkable thermal insulation and fireproof effects and low cost. In addition, the thermal insulation and fireproof material of the present disclosure has excellent wear resistance on the solid part of the composite material and the foam part is not easy to drop slag after one-time casting melding. Because of this, the thermal insulation and fireproof material of the present disclosure does not need to be coated and veneered again. The thermal insulation and fireproof material has very small thermal conductivity, certain oxygen index, and remarkable thermal insulation and flame retardant effects, which can be directly used in the construction and household appliance industry; with low manufacturing cost and environmental pollution, and the thermal insulation and fireproof material is a green environmental protection material.
    BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a schematic cross-sectional view of the thermal insulation and fireproof material of the present disclosure, where 1 is a foam layer, 2 is a solid resin layer, or 1 is a solid resin layer, and 2 is a foam layer.
    DETAILED DESCRIPTION The following embodiments may enable those skilled in the art to more fully understand the present disclosure, but do not limit the present disclosure in any way.
    Embodiment 1: A thermal insulation and fireproof material of the present disclosure was prepared from the following raw materials by weight: 30 parts by weight of 45% tannin extract solution (solvent was water), 13 parts by weight of furfuryl alcohol, 7.4 parts by weight of formaldehyde (37%): 15 parts by weight of p-toluenesulfonic acid solution (65%), 3 parts by weight of Tween-80, and 5 parts by weight of water.
    The present disclosure provided a method for preparing a thermal insulation and fireproof material, which was prepared according to the following steps. The amounts of materials in the preparation method are as described above: 1): Water, furfuryl alcohol, formaldehyde and p- toluenesulfonic acid solution was added to 45% tannin extract solution, stirred well, and let stand for 3-5 min to obtain a solution A, where the solution A was ensured to be at pH S 2.
    2): Half of the solution A as Al was poured into a forming mold, and the remaining half of the solution A served as AZ.
    3): Tween-80 was added to the A2, stirred vigorously for 8 min, and stirring speed was controlled at 1,500 r/min to completely foam the solution.
    4): The foam was slowly poured into the upper layer of the forming mold, and stirred slowly with a stirrer for 1- 2 min; the stirring speed was controlled at 60 r/min, so that the foam was evenly spread on the upper layer of the mold.
    5): The mold was let stand for 2 h to achieve the pre- curing and immobilization of both resin and foam.
    6): The mold was transferred to an oven at 75°C and dried for 12 h to completely cure the mold to obtain a thermal insulation and fireproof material. FIG. 1 shows a schematic cross-sectional view of the thermal insulation and fireproof material of the present disclosure, where a foam layer 2 is disposed above a solid resin layer 1. The reason why the prepared thermal insulation and fireproof material does not require coating or veneering is because the solid part of the composite material has high wear resistance and the foam part has a small slag drop rate, so that there is no need for coating and veneering treatment again.
    Embodiment 2: A thermal insulation and fireproof material of the present disclosure was prepared from the following raw materials by weight: 20 parts by weight of 45% tannin extract solution, 10 parts by weight of furfuryl alcohol, 5 parts by weight of formaldehyde (37%): 10 parts by weight of p- toluenesulfonic acid solution (65%), 5 parts by weight of Tween-80, and 10 parts by weight of water.
    The present disclosure provided a method for preparing a thermal insulation and fireproof material, which was prepared according to the following steps. The amounts of materials in the preparation method are as described above: 1): Water, furfuryl alcohol, formaldehyde and p- toluenesulfonic acid solution was added to tannin extract solution, stirred well, and let stand for 3-5 min to obtain a solution A, where the solution A was ensured to be at pH < 2, 2): Half of the solution A as Al was poured into a forming mold, and the remaining half of the solution A served as A2.
    3): Tween-80 was added to the A2, stirred vigorously for 8 min, and stirring speed was controlled at 2,000 r/min to completely foam the solution.
    4): The foam was slowly poured into the upper layer of the forming mold, and stirred slowly with a stirrer for 1- 2 min; the stirring speed was controlled at 60 r/min, so that the foam was evenly spread on the upper layer of the mold.
    5): The mold was let stand for 2 h to achieve the pre- curing and immobilization of both resin and foam.
    6): The mold was transferred to an oven at 65°C and dried for 8 h to completely cure the mold.
    Embodiment 3: A thermal insulation and fireproof material of the present disclosure was prepared from the following raw materials by weight: 20 parts by weight of tannin extract solution (40-50%), 10 parts by weight of furfuryl alcohol, parts by weight of formaldehyde (37%): 10 parts by weight of p-toluenesulfonic acid solution (65%), 3 parts by weight 10 of Tween-80, and 15 parts by weight of water.
    The present disclosure provided a method for preparing a thermal insulation and fireproof material, which was prepared according to the following steps. The amounts of materials in the preparation method are as described above: 1): Water, furfuryl alcohol, formaldehyde and p- toluenesulfonic acid solution was added to tannin extract solution, stirred well, and let stand for 3-5 min to obtain a solution A, where the solution A was ensured to be at pH < 2.
    2): One-third of the solution A as Al was poured into a forming mold, and the remaining 2/3 of the solution A served as AZ.
    3): Tween-80 was added to the A2, stirred vigorously for 8 min, and stirring speed was controlled at 1,200 r/min to completely foam the solution.
    4): The foam was slowly poured into the upper layer of the forming mold, and stirred slowly with a stirrer for 1- 2 min; the stirring speed was controlled at 100 r/min, so that the foam was evenly spread on the upper layer of the mold.
    5): The mold was let stand for 2 h to achieve the pre- curing and immobilization of both resin and foam.
    6): The mold was transferred to an oven at 80°C and dried for 10 h to completely cure the mold.
    Comparative Embodiment 1 Except for the differences described below, the preparation method was the same as that in Embodiment 1. The raw material ratio was as follows: 30 parts by weight of 45% tannin extract solution (solvent was water), 10 parts by weight of furfuryl alcohol, 5 parts by weight of formaldehyde (37%), 10 parts by weight of p-toluenesulfonic acid solution (65%), 0 parts by weight of Tween-80, and 5 parts by weight of water. After stirring uniformly, solution A was totally prepared into a solution Al and cured for 8 h at 60°C. The thermal conductivity of the composite material prepared under this condition was much higher than that prepared by formulas of Embodiments 1 to 3, with poor thermal insulation performance, as shown in Table 1.
    Comparative Embodiment 2 Except for the differences described below, the preparation method was the same as that in Embodiment 1. The raw material ratio was as follows: 30 parts by weight of 45% tannin extract solution (solvent was water), 20 parts by weight of furfuryl alcohol, 5 parts by weight of formaldehyde (37%): 10 parts by weight of p-toluenesulfonic acid solution (65%), 5 parts by weight of Tween-80, and 30 parts by weight of water. The stirring speed was 1,000 r/min, and the stirring time was 5 min. Solution A was totally prepared into a solution A2 and cured for 8 h at 60°C. The foam composite material prepared under this condition was too brittle and had a high slag drop rate, which was not conducive to operation and must be used after coating or veneering.
    In the following, performances of the thermal insulation and fireproof materials in the embodiments and comparative embodiments were tested. The test results of thermal insulation and fireproof indexes are shown in Table 1.
    G Table 1 Thermal Oxygen Foam thickness/resin conductivity index solid thickness (N/ (m-K) {%) Embodiment 28 7:1 et loon Embodiment 28.8 7:1 pe oe Embodiment 32 14:1 pe om [FO En Embodiment 0.046 1 Comparative enn 7 1:0 Embodiment 0.015 2 From Table 1, the thermal insulation and fireproof material prepared by the present disclosure has very low thermal conductivity, which is significantly lower than that of other thermal insulation materials that have been widely used, and has excellent thermal insulation performance; the thermal insulation and fireproof material reaches a standard oxygen index, has a certain fireproof property, which is obviously better than that of polyurethane foam and polystyrene foam with good thermal insulation performance. The thermal conductivity of the polyurethane foam is between
    0.015 and 0.03 W/ (m-K), and the oxygen index of unmodified polyurethane is usually less than 26%; the thermal conductivity of the polystyrene foam is between 0.04 and
    0.15 W/ (m-X), and the oxygen index of the polystyrene foam is generally around 26%. In addition, the thickness of a composite foam layer and a solid layer can be adjusted by the amount of the solutions Al and AZ. Through the settings of Comparative Embodiments 1 and 2, Comparative Embodiment 1 shows that the material is a solid resin material, which is unfoamed and has relatively high thermal conductivity, thereby having poor thermal insulation. Comparative Embodiment 2 shows that the presence of a large amount of water makes the material less dense, brittle and difficult to handle, so the material can be used only after veneering or coating treatment during use.
    Those skilled in the art should understand that the above embodiments are only exemplary, and various changes, substitutions and alterations can be made without departing from the spirit and scope of the present application.
    权利要求:
    Claims (6)
    [1]
    Thermal insulating and fire-resistant material, wherein the thermal insulating and fire-resistant material is prepared from the following raw materials: 20-30 parts by weight of tannin extract solution, 10-20 parts by weight of furfuryl alcohol, 5-10 parts by weight of 37% (wt. / wt) formaldehyde, 10-20 parts by weight of 65% (w / w) p-toluenesulfonic acid solution, 1-5 parts by weight of Tween-80, and 5-30 parts by weight of water.
    [2]
    A thermal insulating and fire-resistant material according to claim 1, wherein the thermal insulating and fire-resistant material is preferably prepared from the following raw materials: 30 parts by weight of tannin extract solution, 13 parts by weight of furfuryl alcohol, 7.4 parts by weight. 37% (w / w) formaldehyde, 15 parts by weight of 65% (w / w) p-toluenesulfonic acid solution, 3 parts by weight of Tween-80, and 5 parts by weight of water.
    [3]
    The thermal insulating and fire-resistant material of claim 1, wherein the tannin extract solution has a mass concentration of 40-50%, a pH value of 4.0-6.0, and a tannin content of not less than 60%.
    [4]
    The thermal insulating and fire-resistant material according to claim 1, wherein molding of a mold is carried out simultaneously with a resin foam layer and a solid resin layer.
    [5]
    The thermally insulating and fire resistant material according to claim 1, wherein the thermally insulating and fire resistant material is prepared according to the following steps:
    1} adding water, furfuryl alcohol, formal-
    dehyde and p-toluenesulfonic acid solution to the tannin extract solution, stir it well and let it stand for 3-5 min to obtain a solution A, ensuring the solution A at pH ≤ 2;
    2) dividing the solution A into a first portion A1 and a second portion A2, and pouring the first portion A1 into a mold;
    3) adding Tween-80 to the second portion A2, stirring for 5-10 min, and controlling stirring speed at 1,000-2,000 rpm to allow the solution to foam completely and obtain a foam;
    4) pouring the foam into the top layer of the mold, stirring for 1-2 min, and controlling stirring speed at 5-100 r / min, so that the foam spreads smoothly and evenly on the top layer of the mold is becoming;
    5) allowing the foam to stand to achieve pre-cure and immobilization of both resin and foam Le;
    [6]
    6) moving the mold to an oven at 60-80 ° C and drying for 8-12 hours, and allowing it to fully cure to obtain the thermally insulating and fire-resistant material. -0-0-0-
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CN202010184786.2A|CN111333801A|2020-03-17|2020-03-17|Thermal insulation fireproof material and preparation method thereof|
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