Isishwankathelo sezinto ze-polyurethane foam: ukusuka kwi-microstructure ukuya kwi-macroscopic performance
Njengenye yezona zinto zisetyenziswa kakhulu kwi-polymer namhlanje, umahluko wokusebenza kwe-polyurethane foam uvela kakhulu kwiindlela ezahlukeneyo zokwakha ii-pore. Nangona i-closed-cell foam kunye ne-open-cell foam zineempawu ezifanayo zeekhemikhali, zibonisa iipropati zomzimba ezahlukeneyo ngokupheleleyo ngenxa yomahluko kwi-microstructure, engenakuhlukaniswa nolawulo oluchanekileyo lwee-polyurethane catalysts.
Uphawu lwefoam evaliweyo kukuba iqamza ngalinye lijikelezwe ludonga olupheleleyo lwepolymer ukwenza isakhiwo esizimeleyo nesivaliweyo. Esi sakhiwo sinika izinto ukusebenza okugqwesileyo kokugquma ubushushu (ukuqhuba kobushushu kudla ngokuba yi-0.018-0.028W/(m·K)) kunye namandla aphezulu oomatshini (amandla okucinezela anokufikelela kwi-150-500kPa). Ifoam evulekileyo ifumana ukusebenza okuhle kwe-acoustic (i-NRC inokufikelela kwi-0.6-0.9) kunye nokuvuleka komoya (isantya sokujikeleziswa komoya sidlula i-90%) ngenethiwekhi ye-pore edibeneyo. Ukuqonda indlela yokwakheka kunye nomahluko wokusebenza kwezi foam zimbini kubalulekile ekukhetheni ngokuchanekileyo iinkqubo ze-catalyst kunye nokwenza ngcono iinkqubo zemveliso.
Indlela yekhemikhali yokwakheka kwesakhiwo seembobo kunyeisikhuthaziummiselo
Indlela yokwenziwa kwefoam kwiiseli ezivaliweyo
Ukwakhiwa kwesakhiwo se-closed-cell yinkqubo yokulingana okuguquguqukayo, exhomekeke kakhulu kwezi zinto zintathu zilandelayo:
1. Izinga lokuveliswa kwegesi: limiselwa lizinga lokusabela kwe-isocyanate kunye namanzi (impendulo ye-foaming)
2. Izinga lophuhliso lwamandla e-polymer matrix: limiselwa lizinga lokusabela kwe-isocyanate kunye ne-polyol (i-gel reaction)
3. Uzinzo lomphezulu: lugcinwa yimpembelelo yokusebenzisana kwe-surfactant kunye ne-catalyst
Xa izinga lokusabela kwejeli likhawuleza ngokwaneleyo, i-polymer matrix inokwenza ifilimu yodonga enamandla aneleyo ngaphambi kokuba uxinzelelo lwangaphakathi lwebhamuza lufikelele kwixabiso elibalulekileyo, ngaloo ndlela igcina iimbobo zingasebenzi. Idatha yethu yovavanyo ibonisa ukuba ukusetyenziswa kwenkqubo ye-catalyst ezinikeleyo kunokunyusa izinga le-closed-cell ukusuka kwi-85% ukuya ngaphezulu kwe-95%, kwaye i-thermal conductivity conductivity incitshiswa nge-15-20% ngokufanelekileyo.
Umgaqo wokulungiselela i-foam evulekileyo
Ukwakheka kwesakhiwo seeseli ezivulekileyo kuxhomekeke kwindlela elawulwa ngokuchanekileyo "yokuqhekeka kwefestile". Xa kuhlangatyezwana nale miqathango ilandelayo, udonga lweseli luya kuqhekeka ngexesha lokwenza isakhiwo seeseli ezivulekileyo:
- Ukusabela kwejeli kuyalibaziseka, ukuze udonga lweseli luhlale luthambile ngexesha lokukhula
- Izinga lokuveliswa kwegesi kunye nezinga lokuphuhliswa kwamandla epolymer zifikelela kumlinganiselo ofanelekileyo
- Uxinzelelo lomphezulu luncitshiswa ngokufanelekileyo kwinqanaba elibalulekileyo
Ngokulungisa umlinganiselo we-amine catalyst kwi-metal catalyst, sinokulawula ngokuchanekileyo umlinganiselo we-open-cell ngaphakathi koluhlu lwe-80-98% ukuhlangabezana neemfuno ezahlukeneyo zesicelo. Umzekelo, ama-acoustic foams adla ngokufuna umlinganiselo we-open-cell ongaphezulu kwe-92%, ngelixa izixhobo zesihluzi zinokufuna isakhiwo se-open-cell ngokupheleleyo.
Icebo lokukhetha nokwenza ngconoisikhuthaziinkqubo
Inkqubo ekhethekileyo yokunceda i-foam evaliweyo
Ukuveliswa kwefoam evaliweyo esebenza kakhulu kufuna ukulinganisela iimpendulo ezintathu ezibalulekileyo:
1. Impendulo ye-foam (ukuveliswa kwegesi): ii-catalysts ze-triethylenediamine (TEDA) ezifana ne-MXC-102 zihlala zikhethwa
2. I-Gel reaction (ukwakheka kwepolymer): Kucetyiswa ukuba kubekho uthotho lwe-octoate lwe-MXC-T12
3. I-Trimerization reaction (ukumelana nobushushu okuphuculweyo): Ii-catalysts ezikhethekileyo ze-isocyanurate ezifana ne-MXC-15
Iikhatalyst ze-MXC-CF200 ezihlanganisiweyo esizenzileyo zilungele ngokukodwa ukusetyenziswa kwefoam evaliweyo kwaye zineempawu ezilandelayo:
- Izinga leeseli ezivaliweyo lizinzile ngaphezulu kwama-93%
- Izinga lotshintsho lobukhulu <1.5% (70℃, iiyure ezingama-48)
- Ukuhambelana okugqibeleleyo neearhente zokuvuthela ze-HFO
- Ukuthobela imigangatho yokukhusela umlilo kwishishini lokwakha
Isisombululo esikhethekileyo se-catalyst kwi-foam evulekileyo
Eyona nto iphambili ekuvelisweni kwefoam evulekileyo kukulibazisa ukusabela kwejeli ngelixa uqinisekisa ukuba iyasebenza emva kokupholisa. Uthotho lwethu lwe-MXC-OF300 lubonelela ngezi zinto zilandelayo:
- Imingxunya evulekileyo elawulwa ngokuchanekileyo (ihlengahlengiswa nge-85-99%)
- Ukuqina okugqwesileyo (ukujiya kwebhola ngaphezulu kwama-65%)
- Iimpawu zevumba eliphantsi (i-VOC < 50μg/m³)
- Ukuhambelana okuhle nee-retardants zomlilo
Kubaluleke kakhulu ukuba i-MXC-OF350 catalyst yethu entsha ephuhlisweyo ifikelela kulawulo oluchanekileyo lwesakhiwo seseli evulekileyo ngendlela eyahlukileyo yokulibaziseka kokusebenza, isombulula ngempumelelo ingxaki yesiphene seseli evaliweyo edla ngokubonakala kwiifoam ezinokumelana okuphezulu.
Iindlela zophuhliso lwetekhnoloji kunye nezisombululo ezintsha
Ngenxa yemithetho yokusingqongileyo engqongqo ngakumbi kunye neemfuno ezahlukeneyo zokusetyenziswa kwesiphelo, itekhnoloji ye-polyurethane catalyst ijongene nemingeni kunye namathuba amatsha:
1. Inkqubo yefoam evaliweyo ene-thermal conductivity ephantsi kakhulu:
- Phuhlisa ii-catalysts ezihambelana ngokugqibeleleyo nesizukulwana esitsha see-HFO blowing agents
- Itekhnoloji ye-Nanocomposite catalytic iphucula ukuthembeka kweeseli ezivaliweyo
- Ithagethi yokuqhuba ubushushu: <0.018W/(m·K)
2. Itekhnoloji yefoam evulekileyo ekrelekrele:
- Ulawulo lwe-Gradient open porosity (i-porosity eyahlukileyo kwiindawo ezahlukeneyo)
- Inkqubo yokunceda abantu abanengxaki yokusingqongileyo
- Isihluzi sefoam esivulekileyo esinokuphinda sisetyenziswe
3. Izisombululo ezizinzileyo zokutsala amandla:
- Uphuhliso lwe-catalyst olusekelwe kwi-bio
- Inkqubo yokukhupha i-VOC ephantsi
- Iteknoloji yokunyanga ngobushushu obuphantsi (ukonga amandla angaphezu kwama-30%)
Inkxaso yobuchwephesha kunye neenkonzo
Sinikezela ngenkxaso yobugcisa epheleleyo kubavelisi be-polyurethane kwihlabathi liphela:
- Inkonzo yovavanyo lwelebhu: bonelela ngengxelo yovavanyo lokuqala zingadlulanga iiyure ezingama-72
- Ukulungiswa komgca wemveliso: isikhokelo sobugcisa kwindawo kunye nokulungiswa kwenkqubo
- Uphuhliso oluzenzekelayo: phuhlisa inkqubo yokunceda abantu abakhubazekileyo ngokweemfuno ezizodwa
- Uqeqesho lobuchwephesha: Bamba rhoqo iiseminari zobuchwepheshe befoam kunye nokusetyenziswa kwe-catalyst
Ukuze ufumane ulwazi oluneenkcukacha zobugcisa okanye ukufaka isicelo sovavanyo lwesampulu yasimahla, nceda unxibelelane neqela lethu lobugcisa ngale ndlela ilandelayo:
- Email: info@mingxuchem.com
- Iwebhusayithi: https://www.mingxuchem.com/
Ukukhetha inkqubo ye-catalyst efanelekileyo linyathelo eliphambili ekwenzeni ngcono ukusebenza kwe-foam kunye nokuphucula ukusebenza kakuhle kwemveliso. Masisebenzisane ukukhuthaza uphuhliso olutsha lwetekhnoloji ye-polyurethane foam.
Ixesha leposi: Meyi-06-2025