CN102977430B - Nano wollastonite powder modified composite sound absorbing material and preparation method thereof - Google Patents

Abstract

The invention discloses a nano wollastonite powder modified composite sound absorbing material. The material is prepared from the following raw materials in parts by weight: 100-120 parts of barite powder, 50-60 parts of ceramsite, 40-50 parts of nano wollastonite powder, 80-90 parts of styrene-butadiene latex, 55-65 parts of modified tree ashes, 15-20 parts of talcum powder, 20-30 parts of mulberry fibers, 10-20 parts of nanocarbon, 20-30 parts of EVA (ethylene-vinyl acetate copolymer), 15-20 parts of POE (polyolefin elastomer), 5-10 parts of NBR (nitrile-butadiene rubber), 5-8 parts of trioctyl trimellitate, 4-6 parts of ammonium polyphosphate, 1-2 parts of calcium stearate and 1-2 parts of zinc stearate. The material has the beneficial effects that the problem of developing and researching the sound absorbing material urgently is solved and the novel sound absorbing material which meets the requirements, can stand the tests of harsh environments and has the advantages of high tensile strength, high elongation, high breaking strength, good sound absorbing effect and the like is prepared.

Description

Composite sound-absorbing material of a kind of nano-silicon limestone flour modification and preparation method thereof

Technical field

The present invention relates to composite sound-absorbing material of a kind of nano-silicon limestone flour modification and preparation method thereof, belong to investigation of materials and production technical field.

Background technology

Along with the development of industrial production, communications and transportation, urban architecture, and the increase of the density of population, the increasing of home amenity (sound equipment, air-conditioning, televisor etc.), neighbourhood noise is day by day serious, and it has become large public hazards of polluting human society environment.Noise not only can affect hearing, but also cardiovascular systems, neural system, endocrine system to people has a negative impact.

Existing sound absorbent material also has compound, but the compound performance index excellence of inorganic material and organic materials is less.See on the whole, China's sound absorbent material industry product working ability deficiency, in the research and development of high-end sound absorbent material with produce and exist larger gap compared with developed countries, as: all kinds vehicles (passenger vehicle, subway, high ferro), especially in recent years the demand of the sound absorbent material such as manned spacecraft, also lack and be connected with the market-construction industry of product maximum, lack market awareness and building products working ability.Therefore, be badly in need of at present research and development one and can stand harsh and unforgiving environments test, have that tensile strength is high, elongation is high, breaking tenacity is high, sound-absorbing effect is good and the sound-absorbing material of the advantage such as low cost of manufacture.

Summary of the invention

The object of the invention is to, composite sound-absorbing material of a kind of nano-silicon limestone flour modification and preparation method thereof is provided, solves the formula of matrix material, reduce the production cost that adopts single kind or plurality of raw materials, improve the tensile strength of sound-absorbing effect and the material of material, elongation, breaking tenacity simultaneously.Be used for spraying silk and make acoustical cotton.

The technical solution used in the present invention is as follows:

A composite sound-absorbing material for nano-silicon limestone flour modification, its raw material by following weight part is made: ground barium sulfate 100-120, haydite 50-60, nano-silicon limestone flour 40-50, styrene-butadiene latex 80-90, modification trees ashes 55-65, talcum powder 15-20, mulberry fibre 20-30, nano-sized carbon 10-20, EVA 20-30, POE 15-20, NBR 5-10, trioctyl trimellitate 5-8, ammonium polyphosphate 4-6, calcium stearate 1-2, Zinic stearas 1-2.

Described modification trees ashes are made by following methods: first use 10-15% salt acid soak trees ashes 3-4h, deionized water wash is clean, with 10-12% sodium hydroxide solution, soak 3-4h again, extremely neutral with deionized water wash again, dry, add and be equivalent to the sodium lignosulfonate of trees ashes weight 2-3%, the Union carbide A-162 of 1-2%, the epoxidation tri-glyceride of 2-3%, the ceramics powder of 3-5%, high speed 1200-1500r/min stirs 20-30min, and ovendry power breakdown mill becomes ultrafine powder.

The preparation method of the composite sound-absorbing material of nano-silicon limestone flour modification, is characterized in that comprising the following steps:

(1) ground barium sulfate, haydite, nano-silicon limestone flour is dry except moisture respectively, drying temperature is 110-120 ℃, be 2-3h time of drying, by rear, by formulation ratio, ground barium sulfate, haydite, nano-silicon limestone flour, talcum powder, styrene-butadiene latex are added in high-speed mixer, speed with 500-800rpm at 150-160 ℃ is uniformly mixed 3-5min, add modification trees ashes to continue blend 5-8min, it is stand-by that material is cooled to normal temperature again;

(2) EVA, NBR, POE, trioctyl trimellitate, ammonium polyphosphate, calcium stearate, Zinic stearas are added Mixers with Multi-direction Movement carry out just mixed, just mixed 4-6min, then enter high-speed mixer, add nano-sized carbon, mulberry fibre, speed with 1500-2000rpm at 105-110 ℃ stirs 2-5min, and it is stand-by that material is cooled to normal temperature;

(3) material above-mentioned steps (1) and step (2) being made adds twin screw mixing forcing machine to process, and according to product index, requires Temperature Setting scope 180-280 ℃, then the material of extruding is dropped into granulator granulation, obtains composite sound-absorbing material.

Beneficial effect of the present invention is as follows:

The present invention passes through formula adjustment and process modification, utilize the inorganic powders such as modification trees ashes clad nano wollastonite powder, ground barium sulfate, thereby the sound-absorbing effect and the intensity that improve sound absorbent material, solved the contradiction that sound absorbent material intensity and sound absorption qualities can not get both well.The invention solves the research and development problem of current anxious sound absorbent material, produced the harsh and unforgiving environments that can stand satisfying the demands and tested, there is the sound-absorbing material of the advantages such as tensile strength is high, elongation is high, breaking tenacity is high, sound-absorbing effect is good.Owing to having adopted the inorganic material of larger proportion, therefore reduced production cost, simultaneously because the intensity of inorganic material is higher, improved the mechanical property of material.

Embodiment

A composite sound-absorbing material for nano-silicon limestone flour modification, its raw material by following weight part is made: 115 parts of ground barium sulfates, 60 parts of haydites, 45 parts of nano-silicon limestone flours, 88 parts of styrene-butadiene latexes, 56 parts, modification trees ashes, 16 parts of talcum powder, 30 parts of mulberry fibres, 15 parts of nano-sized carbon, 30 parts of EVA, 16 parts of POE, 10 parts of NBR, 6 parts of trioctyl trimellitates, 4 parts of ammonium polyphosphates, 2 parts of calcium stearates, 2 parts of Zinic stearass.

Wherein, described modification trees ashes are made by following methods: first use 10% salt acid soak trees ashes 4h, deionized water wash is clean, with 10% sodium hydroxide solution, soak 4h again, extremely neutral with deionized water wash again, dry, add and be equivalent to the sodium lignosulfonate of trees ashes weight 2.5%, 2% Union carbide A-162,2.5% epoxidation tri-glyceride, 4% ceramics powder, high speed 1500r/min stirs 20min, and ovendry power breakdown mill becomes ultrafine powder.

The preparation method of the composite sound-absorbing material of nano-silicon limestone flour modification, is characterized in that comprising the following steps:

(1) ground barium sulfate, haydite, nano-silicon limestone flour is dry except moisture respectively, drying temperature is 120 ℃, be 2h time of drying, by rear, by formulation ratio, ground barium sulfate, haydite, nano-silicon limestone flour, talcum powder, styrene-butadiene latex are added in high-speed mixer, speed with 800rpm at 160 ℃ is uniformly mixed 3min, add modification trees ashes to continue blend 5min, it is stand-by that material is cooled to normal temperature again;

(2) EVA, NBR, POE, trioctyl trimellitate, ammonium polyphosphate, calcium stearate, Zinic stearas are added Mixers with Multi-direction Movement carry out just mixed, just mixed 6min, then enter high-speed mixer, add nano-sized carbon, mulberry fibre, speed with 1600rpm at 110 ℃ stirs 5min, and it is stand-by that material is cooled to normal temperature;

(3) material above-mentioned steps (1) and step (2) being made adds twin screw mixing forcing machine to process, and according to product index, requiring Temperature Setting is 245 ℃, then the material of extruding is dropped into granulator granulation, obtains composite sound-absorbing material.

Detect index: sound absorption coefficient 1.23, tensile strength 1376kPa, elongation 55%, breaking tenacity 4937N/m.4412 yuan/ton of costs.

Claims (2)

1. the composite sound-absorbing material of nano-silicon limestone flour modification, it is characterized in that, its raw material by following weight part is made: ground barium sulfate 100-120, haydite 50-60, nano-silicon limestone flour 40-50, styrene-butadiene latex 80-90, modification trees ashes 55-65, talcum powder 15-20, mulberry fibre 20-30, nano-sized carbon 10-20, EVA 20-30, POE 15-20, NBR 5-10, trioctyl trimellitate 5-8, ammonium polyphosphate 4-6, calcium stearate 1-2, Zinic stearas 1-2;

Described modification trees ashes are made by following methods: first use 10-15% salt acid soak trees ashes 3-4h, deionized water wash is clean, with 10-12% sodium hydroxide solution, soak 3-4h again, extremely neutral with deionized water wash again, dry, add and be equivalent to the sodium lignosulfonate of trees ashes weight 2-3%, the Union carbide A-162 of 1-2%, the epoxidation tri-glyceride of 2-3%, the ceramics powder of 3-5%, high speed 1200-1500r/min stirs 20-30min, and ovendry power breakdown mill becomes ultrafine powder.

2. a preparation method for the composite sound-absorbing material of nano-silicon limestone flour as claimed in claim 1 modification, is characterized in that comprising the following steps:

(1) ground barium sulfate, haydite, nano-silicon limestone flour is dry except moisture respectively, drying temperature is 110-120 ℃, be 2-3h time of drying, then by formulation ratio, ground barium sulfate, haydite, nano-silicon limestone flour, talcum powder, styrene-butadiene latex are added in high-speed mixer, speed with 500-800rpm at 150-160 ℃ is uniformly mixed 3-5min, add modification trees ashes to continue blend 5-8min, it is stand-by that material is cooled to normal temperature again;

(2) EVA, NBR, POE, trioctyl trimellitate, ammonium polyphosphate, calcium stearate, Zinic stearas are added Mixers with Multi-direction Movement carry out just mixed, just mixed 4-6min, then enter high-speed mixer, add nano-sized carbon, mulberry fibre, speed with 1500-2000rpm at 105-110 ℃ stirs 2-5min, and it is stand-by that material is cooled to normal temperature;

(3) material above-mentioned steps (1) and step (2) being made adds twin screw mixing forcing machine to process, and according to product index, requires Temperature Setting scope 180-280 ℃, then the material of extruding is dropped into granulator granulation, obtains composite sound-absorbing material.