Green building material and application thereof

Abstract

The invention relates to a green building material and application thereof, and belongs to the technical field of building materials. The invention discloses a green building material which comprises the following raw materials in parts by weight: 80-100 parts of PET plastic particles, 5-10 parts of a chain extender, 1-2 parts of a phosphoric acid solution, 5-8 parts of a foaming agent, 15-30 parts of barium sulfate powder, 5-12 parts of a dispersing agent, 10-20 parts of a spherical carbon material and 4-6 parts of hexamethylene diisocyanate. The number of side chains of the PET plastic is increased through the chain extender, mutual friction between molecular chains is increased, more energy is consumed, and therefore the damping performance is improved. The foaming agent enables the base material to generate tiny pores, air with sound vibration moves relative to the base material, and kinetic energy is converted into internal energy to achieve the silencing effect. All the components are matched with one another to prepare the green building material which has the functions of sound insulation, noise reduction and fire prevention. The green building material prepared by the method is applied to the fields of water conservancy construction, house building and road construction.

Description

Technical Field

[0001] The present invention belongs to the technical field of building materials and relates to a green building material and its application. Background Art

[0002] The use of environmentally friendly green building materials can play a role in alleviating environmental pollution. By virtue of the low energy consumption and recyclable functions of this type of material, the pollution of building construction to the environment can be reduced, and the core problems in the development of the building industry can be solved.

[0003] Sound insulation materials provide some obstacles in the sound wave propagation path to block its propagation path. Due to the different characteristics of materials, the places and degrees of sound insulation are also different. Sound insulation materials also have a certain degree of physical flexibility, and its principle is to stimulate the interlayer where the vibration propagates when the sound wave is incident. There are also some special cases, that is, when the sound wave is not perpendicular to the interlayer and forms an angle θ with the layer. At this time, when the previous sound wave reaches the surface of the insulation layer, it will instead propagate laterally. If the bending wave propagation speed and the air speed of the sound wave gradually become consistent at the surface of the insulation layer, the sound wave will increase the bending vibration, and this phenomenon is called the matching effect. If the amplitude of the bending vibration is particularly large, then the energy radiation sound wave on the other side in the air will also be particularly large, which will reduce the sound insulation effect. In addition, sealed solid materials also have very good sound insulation effects. Currently, various synthetic fibers on the market are used in the manufacture of sound absorption and noise reduction materials, which have a porous structure, are soft in texture and easy to process and form. The material cost is low, and it is green and environmentally friendly, and is widely used in various fields such as transportation and construction. Summary of the Invention

[0004] The present invention relates to a green building material and its application, belonging to the technical field of building materials. The present invention discloses a green building material comprising the following raw materials in parts by weight: 80-100 parts of PET plastic particles, 5-10 parts of chain extender, 1-2 parts of phosphoric acid solution, 5-8 parts of foaming agent, 15-30 parts of barium sulfate powder, 5-12 parts of dispersant, and 10-20 parts of spherical carbon material. The present invention increases the number of side chains of PET plastic through a chain extender, increases the mutual friction between molecular chains, and dissipates more energy to improve the damping performance. The foaming agent makes the base material generate fine pores, and the air where the sound vibrates makes relative movement with the base material, converting kinetic energy into internal energy to play a sound absorption role. Each component cooperates with each other to prepare a green building material with sound insulation and noise reduction and fire prevention functions at the same time. The green building material prepared by this method is applied to the fields of water conservancy construction, housing construction and road construction.

[0005] The object of the present invention can be achieved by the following technical solutions:

[0006] A green building material, which comprises raw materials: PET plastic particles, chain extender, phosphoric acid solution, foaming agent, barium sulfate powder, dispersant, spherical carbon material, and hexamethylene diisocyanate.

[0007] Further, the green building material comprises the following raw materials in parts by weight: 80 - 100 parts of PET plastic particles, 5 - 10 parts of chain extender, 1 - 2 parts of phosphoric acid solution, 5 - 8 parts of foaming agent, 15 - 30 parts of barium sulfate powder, 5 - 12 parts of dispersant, 10 - 20 parts of spherical carbon material, and 4 - 6 parts of hexamethylene diisocyanate.

[0008] Further, the preparation method of the green building material comprises the following steps:

[0009] A1: Prepare PET plastic particles: Wash, dry, crush, and heat the recycled PET plastic bottles, and then melt and granulate them.

[0010] A2: Mix and stir the chain extender, hexamethylene diisocyanate, and phosphoric acid solution under the condition of introducing nitrogen, and then heat and react to form a polycondensate.

[0011] A3: Add the PET plastic particles and foaming agent obtained in step A1 into the polycondensate, and then heat and react.

[0012] A4: Then add barium sulfate powder, dispersant, and spherical carbon material, carry out ultrasonic treatment and extrusion granulation to obtain the green building material.

[0013] Further, in step A2, the chain extender is composed of 1,4 - butanediol and sorbitol, and the mass ratio of the two is 1:1. The mass fraction of the phosphoric acid solution is 40% - 50%.

[0014] Further, in step A2, the stirring time is 15 - 20 min, the temperature increase refers to increasing the temperature to 30 - 35 °C, and the reaction time is 40 min.

[0015] Further, in step A3, the foaming agent is diisopropyl azodicarboxylate, and the heating refers to heating to 250 - 260 °C, and the reaction time is 30 - 40 min.

[0016] Further, in step A4, the dispersant is dipropylene glycol dimethyl ether, and the ultrasonic time is 20 - 30 min.

[0017] The application of a green building material.

[0018] Further, the green building material is applied in the fields of water conservancy construction, road construction, and housing construction.

[0019] The beneficial effects of the present invention:

[0020] (1) The present invention increases the number of side chains of PET plastics through a chain extender, increasing the mutual friction between molecular chains and consuming more energy, thereby improving the damping performance. The foaming agent causes the base material to generate fine pores, and the air in which the sound vibrates moves relative to the base material, converting kinetic energy into internal energy to play a sound-absorbing role. Barium sulfate powder acts as a filler to increase the density of the green building material, thereby playing a sound-insulating role.

[0021] (2) The spherical carbon material itself has a certain degree of flame retardancy and good compatibility with PET. Under the action of a dispersant, the spherical carbon material can be evenly dispersed in PET, endowing it with fireproof function.

[0022] (3) The present invention uses recycled PET plastic bottles as the base material, improving the waste recycling rate and utilization rate. Moreover, all raw materials used for preparing building materials are environmentally friendly materials, which can play a role in alleviating environmental pollution. With the low energy consumption and recyclable function of this type of material, it reduces the environmental pollution caused by building construction. Specific Embodiments

[0023] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following combines examples to detail the specific embodiments, structures, features, and their effects according to the present invention as follows.

[0024] Example 1

[0025] The green building material comprises the following raw materials in parts by weight: 80 parts of PET plastic particles, 3 parts each of 1,4-butanediol and sorbitol, 1 part of phosphoric acid solution, 5 parts of diisopropyl azodicarboxylate, 15 parts of barium sulfate powder, 5 parts of dipropylene glycol dimethyl ether, 10 parts of spherical carbon material, and 4 parts of hexamethylene diisocyanate.

[0026] The preparation method of the green building material comprises the following steps:

[0027] A1: Prepare PET plastic particles: Wash, dry, crush, and heat up the recycled PET plastic bottles, and then melt and granulate them;

[0028] A2: Mix 3 parts by weight each of 1,4-butanediol and sorbitol, 1 part by weight of phosphoric acid solution with a mass fraction of 40%, and 4 parts by weight of hexamethylene diisocyanate, and mix and stir them for 15 min under the condition of introducing nitrogen, then heat up to 30 °C and react for 40 min to form a condensate;

[0029] A3: Add 80 parts by weight of the PET plastic particles prepared in step A1 and 5 parts by weight of diisopropyl azodicarboxylate to the condensate, and heat to 250 °C and react for 30 min;

[0030] A4: Then add 15 parts by weight of barium sulfate powder, 5 parts by weight of dipropylene glycol dimethyl ether, and 10 parts by weight of spherical carbon material, perform ultrasonic treatment for 20 min, and extrude and granulate to obtain a green building material.

[0031] The spherical carbon material in step A4 is generated by the phase transition of asphalt substances at high temperature.

[0032] Example 2

[0033] The green building material contains the following raw materials in parts by weight: 90 parts of PET plastic particles, 4 parts each of 1,4-butanediol and sorbitol, 1.5 parts of phosphoric acid solution, 7 parts of diisopropyl azodicarboxylate, 22 parts of barium sulfate powder, 8 parts of dipropylene glycol dimethyl ether, 15 parts of spherical carbon material, and 5 parts of hexamethylene diisocyanate.

[0034] The preparation method of the green building material includes the following steps:

[0035] A1: Prepare PET plastic particles: Wash, dry, crush, and heat up the recycled PET plastic bottles, and melt and granulate them;

[0036] A2: 4 parts by weight each of 1,4-butanediol and sorbitol, 1.5 parts by weight of phosphoric acid solution with a mass fraction of 40%, and 5 parts by weight of hexamethylene diisocyanate. The four are mixed and stirred for 17 min under the condition of introducing nitrogen, and heated to 33 °C and reacted for 40 min to form a polycondensate;

[0037] A3: Add 90 parts by weight of the PET plastic particles in step A1 and 7 parts by weight of diisopropyl azodicarboxylate to the polycondensate, and heat to 255 °C and react for 35 min;

[0038] A4: Then add 22 parts by weight of barium sulfate powder, 8 parts by weight of dipropylene glycol dimethyl ether, and 15 parts by weight of spherical carbon material, perform ultrasonic treatment for 25 min, and extrude and granulate to obtain a green building material.

[0039] The spherical carbon material in step A4 is generated by the phase transition of asphalt substances at high temperature.

[0040] Example 3

[0041] The green building material contains the following raw materials in parts by weight: 100 parts of PET plastic particles, 5 parts each of 1,4-butanediol and sorbitol, 2 parts of phosphoric acid solution, 8 parts of diisopropyl azodicarboxylate, 30 parts of barium sulfate powder, 10 parts of dipropylene glycol dimethyl ether, 20 parts of spherical carbon material, and 6 parts of hexamethylene diisocyanate.

[0042] The preparation method of the green building material includes the following steps:

[0043] A1: Preparation of PET plastic particles: Wash, dry, crush and heat up the recycled PET plastic bottles, and then melt and granulate them;

[0044] A2: Mix and stir 5 parts by weight of 1,4 - butanediol, 5 parts by weight of sorbitol, 2 parts by weight of phosphoric acid solution with a mass fraction of 40% and 6 parts by weight of hexamethylene diisocyanate for 20 min under the condition of introducing nitrogen, and then heat up to 35 °C and react for 40 min to form a polycondensate;

[0045] A3: Add 100 parts by weight of the PET plastic particles in step A1 and 8 parts by weight of diisopropyl azodicarboxylate to the polycondensate, and heat to 260 °C and react for 40 min;

[0046] A4: Then add 30 parts by weight of barium sulfate powder, 10 parts by weight of dipropylene glycol dimethyl ether and 20 parts by weight of spherical carbon material, carry out ultrasonic treatment for 30 min, and then extrude and granulate to obtain a green building material.

[0047] The spherical carbon material in step A4 is produced by the phase transformation of asphalt - like substances at high temperature.

[0048] Comparative Example 1

[0049] On the basis of Example 3, remove 1,4 - butanediol and replace it with an equal weight of sorbitol, and keep other conditions the same as those in Example 3.

[0050] Comparative Example 2

[0051] On the basis of Example 3, remove sorbitol and replace it with an equal weight of 1,4 - butanediol, and keep other conditions the same as those in Example 3.

[0052] Comparative Example 3

[0053] On the basis of Example 3, the green building material contains the following raw materials in parts by weight: 100 parts of PET plastic particles, 5 parts each of 1,4 - butanediol and sorbitol, 2 parts of phosphoric acid solution, 30 parts of barium sulfate powder, 10 parts of dipropylene glycol dimethyl ether, 20 parts of spherical carbon material, and 6 parts by weight of hexamethylene diisocyanate.

[0054] The preparation method of the green building material includes the following steps:

[0055] A1: Preparation of PET plastic particles: Wash, dry, crush and heat up the recycled PET plastic bottles, and then melt and granulate them;

[0056] A2: Mix and stir 5 parts by weight of 1,4 - butanediol, 5 parts by weight of sorbitol, 2 parts by weight of phosphoric acid solution with a mass fraction of 40% and 6 parts by weight of hexamethylene diisocyanate for 20 min under the condition of introducing nitrogen, and then heat up to 35 °C and react for 40 min to form a polycondensate;

[0057] A3: Add 100 parts by weight of the PET plastic particles in step A1 to the polycondensate, heat to 260 °C and react for 40 min;

[0058] A4: Then add 30 parts by weight of barium sulfate powder, 10 parts by weight of dipropylene glycol dimethyl ether and 20 parts by weight of spherical carbon material, carry out ultrasonic treatment for 30 min, and extrude and pelletize to obtain the green building material.

[0059] The spherical carbon material in step A4 is produced by phase transformation of asphalt substances at high temperature.

[0060] Comparative Example 4

[0061] Based on Example 3, the green building material contains the following raw materials in parts by weight: 100 parts of PET plastic particles, 5 parts each of 1,4-butanediol and sorbitol, 2 parts of phosphoric acid solution, 8 parts of diisopropyl azodicarboxylate, 10 parts of dipropylene glycol dimethyl ether, 20 parts of spherical carbon material, and 6 parts by weight of hexamethylene diisocyanate.

[0062] The preparation method of the green building material includes the following steps:

[0063] A1: Prepare PET plastic particles: Wash, dry, crush and heat up the recycled PET plastic bottles, and melt and pelletize them;

[0064] A2: Mix and stir 5 parts by weight each of 1,4-butanediol and sorbitol, 2 parts by weight of phosphoric acid solution with a mass fraction of 40%, and 6 parts by weight of hexamethylene diisocyanate under the condition of introducing nitrogen for 20 min, heat to 35 °C and react for 40 min to form a polycondensate;

[0065] A3: Add 100 parts by weight of the PET plastic particles in step A1 and 8 parts by weight of diisopropyl azodicarboxylate to the polycondensate, heat to 260 °C and react for 40 min;

[0066] A4: Then add 10 parts by weight of dipropylene glycol dimethyl ether and 20 parts by weight of spherical carbon material, carry out ultrasonic treatment for 30 min, and extrude and pelletize to obtain the green building material.

[0067] The spherical carbon material in step A4 is produced by phase transformation of asphalt substances at high temperature.

[0068] Comparative Example 5

[0069] Based on Example 2, the green building material contains the following raw materials in parts by weight: 90 parts of PET plastic particles, 4 parts each of 1,4-butanediol and sorbitol, 1.5 parts of phosphoric acid solution, 7 parts of diisopropyl azodicarboxylate, 22 parts of barium sulfate powder, 15 parts of spherical carbon material, and 5 parts by weight of hexamethylene diisocyanate.

[0070] The preparation method of the green building material comprises the following steps:

[0071] A1: Prepare PET plastic particles: Wash, dry, crush and heat up the recycled PET plastic bottles, and then melt and granulate them;

[0072] A2: Mix 4 parts by weight of 1,4-butanediol and 4 parts by weight of sorbitol, 1.5 parts by weight of phosphoric acid solution with a mass fraction of 40% and 5 parts by weight of hexamethylene diisocyanate, and mix and stir them for 17 min under the condition of introducing nitrogen, then heat up to 33 °C and react for 40 min to form a polycondensate;

[0073] A3: Add 90 parts by weight of the PET plastic particles in step A1 and 7 parts by weight of diisopropyl azodicarboxylate to the polycondensate, and heat up to 255 °C and react for 35 min;

[0074] A4: Then add 22 parts by weight of barium sulfate powder and 15 parts by weight of spherical carbon material, carry out ultrasonic treatment for 25 min, and extrude and granulate to obtain the green building material.

[0075] The spherical carbon material in step A4 is generated by the phase transition of asphalt-like substances at high temperature.

[0076] Comparative Example 6

[0077] Based on Example 2, the green building material contains the following raw materials in parts by weight: 90 parts of PET plastic particles, 4 parts each of 1,4-butanediol and sorbitol, 1.5 parts of phosphoric acid solution, 7 parts of diisopropyl azodicarboxylate, 22 parts of barium sulfate powder, 8 parts of dipropylene glycol dimethyl ether, and 5 parts by weight of hexamethylene diisocyanate.

[0078] The preparation method of the green building material comprises the following steps:

[0079] A1: Prepare PET plastic particles: Wash, dry, crush and heat up the recycled PET plastic bottles, and then melt and granulate them;

[0080] A2: Mix 4 parts by weight of 1,4-butanediol, 4 parts by weight of sorbitol, 1.5 parts by weight of phosphoric acid solution with a mass fraction of 40% and 5 parts by weight of hexamethylene diisocyanate, and mix and stir them for 17 min under the condition of introducing nitrogen, then heat up to 33 °C and react for 40 min to form a polycondensate;

[0081] A3: Add 90 parts by weight of the PET plastic particles in step A1 and 7 parts by weight of diisopropyl azodicarboxylate to the polycondensate, and heat up to 255 °C and react for 35 min;

[0082] A4: Then add 22 parts by weight of barium sulfate powder and 8 parts by weight of dipropylene glycol dimethyl ether, carry out ultrasonic treatment for 25 min, and extrude and granulate to obtain the green building material.

[0083] 1. Sound insulation performance test.

[0084] The green building materials prepared in Examples 1 to 3 and Comparative Examples 1 to 4 were respectively made into samples with the specifications of length × width × thickness of 25 cm × 25 cm × 10 mm. The sound insulation performance of Examples 1 to 3 and Comparative Examples 1 to 4 was tested in accordance with GB / T20247-2006 "Acoustic Measurement in Reverberation Rooms". The test results are shown in Table 1.

[0085] Table 1 Test results of sound insulation performance of Examples 1 to 3 and Comparative Examples 1 to 4

[0086] Sample Sound insulation quantity (dB) Example 1 26.59 Example 2 24.81 Example 3 26.41 Comparative example 1 18.46 Comparative example 2 19.02 Comparative example 3 21.45 Comparative example 4 20.75

[0087] The greater the sound insulation quantity, the better the sound insulation effect. It can be seen from Table 1 that the sound insulation quantities of Comparative Examples 1 to 4 are significantly smaller than those of Examples 1 to 3, and the sound insulation quantity of Example 1 is the largest. The synergy of 1,4-butanediol and sorbitol increases the number of side chains of PET plastic, and the mutual friction between molecular chains increases, consuming more energy to improve the damping performance and further improving the sound insulation effect. Diisopropyl azodicarboxylate makes the substrate produce fine pores, and the air vibrating with sound makes relative movement with the substrate, converting kinetic energy into internal energy to play a sound absorption role. Barium sulfate powder, as a filler, increases the density of the green building material, thus playing a role in sound insulation.

[0088] 2. Flame retardancy performance test

[0089] The flame retardancy performance of the green building materials prepared in Examples 1 to 3 and Comparative Examples 5 to 6 was tested in accordance with GB / T16172-2007. The cone calorimetry test was carried out on specimens with the size of 100 mm × 100 mm × 3 mm using the British FTT cone calorimeter. The average value was taken after testing the root specimens. The test results are shown in Table 2.

[0090] Table 2 Test results of flame retardancy performance of the green building materials of Examples 1 to 3 and Comparative Examples 5 to 6

[0091]

[0092]

[0093] The smaller the heat release rate, the slower the flame spread speed, and the lower the total release increase rate is not conducive to igniting other materials. It can be obtained from Table 2 that the heat release rate and total release in Examples 1 to 3 are less than those in Comparative Examples 5 to 6. The spherical carbon material itself has certain flame retardancy. Under the action of the dispersant, the spherical carbon material can be evenly dispersed in PET to make it have flame retardant function.

[0094] The above are only the preferred embodiments of the present invention and do not impose any formal limitations on the present invention. Although the present invention has been disclosed above in the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the above-disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A green building material, characterized in that: The green building material comprises the following raw materials: PET plastic particles, a chain extender, a phosphoric acid solution, a foaming agent, barium sulfate powder, a dispersant, a spherical carbon material, and hexamethylene diisocyanate.

2. A green building material according to claim 1, characterized in that: The green building material comprises the following raw materials in parts by weight: 80 to 100 parts of PET plastic particles, 5 to 10 parts of chain extender, 1 to 2 parts of phosphoric acid solution, 5 to 8 parts of foaming agent, 15 to 30 parts of barium sulfate powder, 5 to 12 parts of dispersant, 10 to 20 parts of spherical carbon material, and 4 to 6 parts of hexamethylene diisocyanate.

3. A green building material according to claim 2, characterized in that: The preparation method of the green building material comprises the following steps: A1: Preparation of PET plastic particles: Wash, dry, crush, heat and melt the recycled PET plastic bottles into granules; A2: The chain extender, hexamethylene diisocyanate and phosphoric acid solution are mixed and stirred under the condition of nitrogen flow, and the temperature is increased to react to form a polycondensate; A3: adding the PET plastic particles and the foaming agent prepared in step A1 to the polycondensate and heating for reaction; A4: Then add barium sulfate powder, dispersant and spherical carbon material, perform ultrasonic treatment, and extrude granulation to obtain green building materials.

4. A green building material according to claim 3, characterized in that: In the step A2, the chain extender is composed of 1,4-butanediol and sorbitol, the mass ratio of the two is 1:1, and the mass fraction of the phosphoric acid solution is 40% to 50%.

5. A green building material according to claim 3, characterized in that: The stirring time in step A2 is 15 to 20 minutes, the heating refers to heating to 30 to 35° C., and the reaction time is 40 minutes.

6. A green building material according to claim 3, characterized in that: In the step A3, the foaming agent is diisopropyl azodicarboxylate, the heating is to heat to 250-260° C., and the reaction time is 30-40 min.

7. A green building material according to claim 3, characterized in that: In the step A4, the dispersant is dipropylene glycol dimethyl ether, and the ultrasonication time is 20 to 30 minutes.

8. Use of the green building material as claimed in claim 1.

9. The use of a green building material according to claim 8, characterized in that: The green building material is applied to the fields of water conservancy construction, road construction and house construction.

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