Pfupiso yezvinhu zve polyurethane foam: kubva pa microstructure kusvika pakushanda kwe macroscopic
Seimwe yezvinhu zvinoshandiswa zvakanyanya zvepolymer nhasi, musiyano wekushanda kwepolyurethane foam unonyanya kubva mumagadzirirwo akasiyana ezvimiro zvepore. Kunyangwe foam yemasero akavharwa nefoam yemasero akazaruka zvine maumbirwo akafanana emakemikari, zvinoratidza hunhu hwakasiyana zvachose nekuda kwekusiyana kwechimiro che microstructure, iyo isingaparadzaniswi nekudzora kwakanyatsojeka kwe polyurethane catalysts.
Hunhu hwefuro remasero akavharwa ndehwekuti bubble rega rega rakakomberedzwa nemadziro epolymer akazara kuti rigadzire microstructure yakazvimirira uye yakavharwa. Chimiro ichi chinopa chinhu ichi kushanda kwakanaka kwekudzivirira kupisa (thermal conductivity inowanzova 0.018-0.028W/(m·K)) uye simba repamusoro remakanika (simba rekudzvanya rinogona kusvika 150-500kPa). Furo remasero akavhurika rinoita zvakanaka acoustic performance (NRC inogona kusvika 0.6-0.9) uye air permeability (mhepo inotenderera inodarika 90%) kuburikidza ne network yakabatana ye pore. Kunzwisisa mashandiro ekugadzira uye musiyano wekushanda kwemafuro maviri aya kwakakosha pakusarudzwa kwakakodzera kwema catalyst systems uye kugadzirisa maitiro ekugadzira.
Maitiro emakemikari ekuumbwa kwechimiro chepore uyekataviridzimutemo
Maitiro ekuumbwa kwefuro remasero akavharwa
Kuumbwa kwechimiro chemasero akavharwa inzira inochinja-chinja, iyo inonyanya kutsamira pazvinhu zvitatu zvikuru zvinotevera:
1. Mwero wekugadzirwa kwegasi: unoenderana nehuwandu hwekuita kweisocyanate nemvura (kuita kwefuro)
2. Kukura kwesimba rePolymer matrix: kunotsamirwa nekuita kwe isocyanate ne polyol (gel reaction)
3. Kugadzikana kwepamusoro: kunochengetedzwa nekushanda pamwe chete kwesurfactant uye catalyst
Kana gel reaction rate yakakurumidza, polymer matrix inogona kugadzira madziro ane simba rakakwana bubble internal pressure isati yasvika pa critical value, nokudaro ichichengetedza mapores asina kukuvadzwa. Data redu rekuyedza rinoratidza kuti kushandiswa kwe catalyst system yakatsaurirwa kunogona kuwedzera closed-cell rate kubva pa85% kusvika pa95%, uye thermal conductivity coefficient inoderedzwa ne15-20% zvichienderana.
Nheyo yekugadzirira furo rakavhurika
Kuumbwa kwechimiro chemasero akavhurika kunoenderana nemaitiro anonyatso gadziriswa e "kutsemuka kwehwindo". Kana zvinotevera zvikaitika, madziro esero anotsemuka nenguva kuti aumbe chimiro chemasero akavhurika:
- Maitiro egel anononoka, zvekuti madziro esero anoramba akapfava panguva yekukura.
- Mwero wekugadzirwa kwegasi uye mwero wekukura kwesimba repolymer zvinosvika pachiyero chakakodzera
- Kusimba kwemusoro kunoderedzwa zvakakodzera panguva yakakosha
Nekugadzirisa chiyero cheamine catalyst kune metal catalyst, tinogona kudzora nemazvo chiyero che open-cell chiri pakati pe80-98% kuti tikwanise kushandisa zvakasiyana. Semuenzaniso, acoustic foams inowanzoda chiyero che open-cell chinodarika 92%, nepo zvinhu zvekusefa zvingada chimiro che open-cell chakakwana.
Nzira yekusarudza nekugadzirisakataviridzihurongwa
Sisitimu yakakosha ye catalyst yefuro remasero akavharwa
Kugadzirwa kwefuro remasero akavharwa rinoita basa guru kunoda kuyera maitiro matatu akakosha:
1. Kubuda kwefuro (kugadzirwa kwegasi): zvinhu zvinokonzera triethylenediamine (TEDA) zvakaita seMXC-102 zvinowanzo sarudzwa
2. Kuitwa kwejel (kugadzirwa kwepolymer): Stannous octoate MXC-T12 series inokurudzirwa
3. Kugadzirisa kupisa (kusimbaradza kupisa): Zvishandiso zve isocyanurate zvakakosha zvakaita seMXC-15
Ma MXC-CF200 series composite catalysts atagadzira anonyanya kukodzera kushandiswa kwefoam yemasero akavharwa uye ane hunhu hunotevera:
- Mwero wemasero akavharwa wakagadzikana paanopfuura 93%
- Mwero wekuchinja kwehukuru <1.5% (70℃, 48h)
- Kuenderana kwakakwana nemagetsi anoputira HFO
- Tevedzera mitemo yekudzivirira moto muindasitiri yekuvaka
Mhinduro yakakosha ye catalyst ye furo rakavhurika
Chinhu chikuru pakugadzirwa kwefuro remasero akavhurika ndechekunonotsa maitiro ejeli uku uchiita kuti rigare rakakwana mushure mekupora. MXC-OF300 series yedu inopa:
- Maburi akavhurika anodzorwa nemazvo (anogadziriswa 85-99%)
- Kugona kwakanyanya (kudzokera shure kwebhora > 65%)
- Hunhu hwekunhuhwirira kushoma (VOC < 50μg/m³)
- Kuenderana kwakanaka nezvinodzivisa moto
Zvinokosha kuziva kuti MXC-OF350 catalyst yedu itsva yakagadzirwa inokwanisa kudzora chimiro chemasero akavhurika nenzira yakasarudzika kuburikidza nenzira yekunonoka kushanda, zvichibudirira kugadzirisa dambudziko remavharo emasero akavharwa rinowanzoonekwa mumafuro ane simba rekutsungirira.
Mafambiro ekuvandudza tekinoroji uye mhinduro itsva
Nekuda kwemitemo yezvakatipoteredza iri kuramba ichioma uye zvinodiwa zvakasiyana-siyana zvekushandisa pamagetsi, tekinoroji ye polyurethane catalyst iri kutarisana nematambudziko matsva nemikana:
1. Sisitimu yefuro inopfuudzwa nekupisa kwakanyanya-kwakaderera:
- Gadzira zvinhu zvinokonzeresa simba zvinoenderana nechizvarwa chitsva chezvishandiso zvinofefetera zveHFO
- Tekinoroji yeNanocomposite catalytic inovandudza kuvimbika kwemasero akavharwa
- Chinangwa chekupisa: <0.018W/(m·K)
2. Tekinoroji yefuro ine njere:
- Kudzora porosity yakavhurika ine gradient (porosity yakasiyana munzvimbo dzakasiyana)
- Sisitimu ye catalyst inopindura zvakatipoteredza
- Chinogadzirisa furo rinovhurika rinogona kushandiswazve
3. Mhinduro dzinosimudzira kushanduka kwemamiriro ekunze:
- Kugadzirwa kwe catalyst inobva ku bio-based
- Sisitimu yekubudisa VOC yakaderera
- Tekinoroji yekupisa tembiricha yakaderera (kuchengetedza simba rinodarika 30%)
Rutsigiro rwehunyanzvi hwehunyanzvi uye masevhisi
Tinopa rutsigiro rwakakwana rwehunyanzvi kune vagadziri vepolyurethane pasi rese:
- Basa rekuongorora murabhoritari: kupa mushumo wekutanga wekuongorora mukati memaawa makumi manomwe nemaviri
- Kugadzirisa mutsetse wekugadzira: nhungamiro yehunyanzvi panzvimbo uye kugadzirisa maitiro
- Kugadzira tsika: gadzira sisitimu yekubatsira yakasarudzika zvichienderana nezvinodiwa zvakakosha
- Kudzidziswa kwehunyanzvi: Gara uchiitisa misangano yetekinoroji yefuro uye yekushandiswa kwecatalyst
Kuti uwane ruzivo rwakadzama rwehunyanzvi kana kunyorera kuongororwa kwemuenzaniso wemahara, ndapota taura nechikwata chedu chehunyanzvi uchishandisa nzira dzinotevera:
- Email: info@mingxuchem.com
- Webhusaiti: https://www.mingxuchem.com/
Kusarudza sisitimu chaiyo ye catalyst idanho guru mukuvandudza mashandiro efuro uye kuvandudza mashandiro ekugadzira. Ngatishandei pamwe chete kukurudzira kuvandudzwa kwehunyanzvi hwe polyurethane foam.
Nguva yekutumira: Chivabvu-06-2025