基于废弃物资源化和声子晶体的轻薄隔声复合材料

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1、构的PC/PU复合材料，平均隔声性能为34.2dB（A），较空白PU材料提高了12dB（A），且兼具0.25的平均吸声性能。（4）PU吸声材料未经添加任何物质，仅在其基体中构造周期性管状气孔通道就可以有效增加材料的隔声性能。（5）以厚度为40mm的PC/LS/PU复合材料为吸隔音芯层，添加普通的面板层即可达到我国《民用建筑隔声设计规范》（GBJ118-88）规定的使用最多的一般性房屋三级隔声量标准（≥40dB(A)）；当同时引入薄阻尼层后，平均隔声量最大可达到46.3dB(A)，满足以上二级标准（≥

2、45(dB(A)），且厚度仅限在50mm以内，实现了轻薄化的设计目标。关键词：铜尾矿砂，煤矸石，石粉，发泡筋络改性，管阵列，吸隔声性能，复合材料II万方数据AbstractThinsoundinsulationcompositesandphononiccrystalhavebeenaresearchhotspotinthefieldofenvironmentalnoisereduction,particularlytheresearchofbroadbandsoundinsulationcompos

3、iteshasbecomeanewtrendinthedevelopmentofnoisereductionfunctionalecomaterials,whichhasgreatsignificanceforimprovingtheplotratioandreducingtheload-bearingofhigh-risebuildings.Exploringtomodifypolyurethanefoamwithwasteslag,andconstructatwo-dimensionalphot

4、oniccrystalstructurewithtubesarrayinwhich,notonlycanachievehybridcompositewithbroadbandsoundabsorptionandinsulationproperty，whichrealizesintegrationofcomposites’noisereductionperformanceandphotoniccrystal’slocalbandgapeffect,butalsorealizedthewasteslag

5、resourceutilization,itwillbevaluableinapplication.Basedonsolidwasteresourcerecoveryandphononcrystaltheory,alightandthinpolyurethane(PU)compositebothwithbroadbandacousticabsorptionandinsulationpropertieswasdesignedandpreparedinthisresearch.Itsacousticin

6、sulationwasimprovedbythemethodthatmixingwasteslag(WS)inPUmatrixandstrengthenedthemeridianofPUmatrix，meanwhile，theacousticinsulationdomainwasbroadenbysettingatwo-dimensionalarraystructureskeleton.First,orthogonalexperimentalmethodwasusedtostudythetechno

7、logyandprocessparametersofgangueslag(GS),coppertailingslag(CS)andlimestoneslag(LS)，threekindsofWSmodifiedPUcompositematerials.TheprocessparametersofthreekindsoundinsulationoptimalWS/PUcompositesandthreekindsoundabsorptionoptimalweredetermined,andbeveri

8、fied.Next,withPUmaterialsasmatrix,constructingtwodimensionalperiodictubesarraystructure(PC)inwhichduringthefoamingprocess,aPC/PUacousticabsorbingandinsulationcompositematerialwasprepared,andtheimpactfactorsofthesoundabsorptionandinsulat