Ii-catalysts ze-polyurethane zidlala indima ebalulekileyo ekuvelisweni kwe-foam yeseli evulekileyo, into esetyenziswa kakhulu kumashishini ahlukeneyo. I-foam yeseli evulekileyo, ebonakaliswa bulwakhiwo lweseli oludibeneyo, ivumela umoya kunye nolwelo ukuba ludlule, okwenza kube lula ukuphefumla nokuthamba. Olu lwakhiwo lukhethekileyo luyahlula kwi-foam yeseli evaliweyo, eneeseli ezizimeleyo ezibonelela ngemo eqinileyo neqinileyo.
Ukusetyenziswa kweFoam yeSeli evulekileyo
Ifoam evulekileyo iluncedo kwiinkalo ezininzi ngenxa yeempawu zayo ezahlukileyo. Enye yezona zinto ziphambili ekusetyenzisweni kwayo kushishino lwefenitshala, apho isetyenziswa kwimiqamelo kunye neempahla zokuhlamba impahla ukuze inike intuthuzelo kunye nenkxaso. Indalo yayo ethambileyo neguquguqukayo yenza ukuba ilungele oomatrasi, imiqamelo kunye nezihlalo.
Kwicandelo leemoto, i-open-cell foam isetyenziswa kwizihlalo ezixineneyo kunye ne-acoustic insulation. Amandla e-foam okufunxa isandi kunye nokungcangcazela aphucula intuthuzelo kunye nokuzola kweekhabhini zezithuthi. Ukongeza, ubume bayo obulula bunegalelo ekusebenzeni kakuhle kwezithuthi ngokunciphisa ubunzima ngaphandle kokuphazamisa intuthuzelo.
Enye indlela ebalulekileyo yokusebenzisa i-open-cell foam kushishino lokwakha. Isetyenziswa njengesixhobo sokukhusela i-spray foam esinceda ekulawuleni amaqondo obushushu angaphakathi ngokubonelela nge-thermal insulation. Ukuphefumla kwe-foam kukwanceda ekuthinteleni ukuqokelelana komswakama, ngaloo ndlela kunciphisa umngcipheko wokungunda kunye ne-mildew.
Ifoam evulekileyo ikwaxhaphakile kwishishini lokupakisha. Iimpawu zayo zokubopha zikhusela izinto ezibuthathaka ngexesha lokuthunyelwa nokuphathwa. Ngaphezu koko, ukukwazi kwayo ukuhambelana neemilo ezahlukeneyo kuyenza ifaneleke kwizisombululo zokupakisha ezenziwe ngokwezifiso.
Indima yeePolyurethane Catalysts kwi-Open-Cell Foam Synthesis
Ukwenziwa kwe-polyurethane foam evulekileyo kubandakanya ukusabela okuntsonkothileyo kweekhemikhali, apho ii-polyurethane catalysts zibalulekile. Ezi catalysts zichaphazela amazinga okusabela kunye neempawu zokugqibela ze-foam. Kukho iintlobo ezimbini eziphambili zee-catalysts ezisetyenziswa kule nkqubo: ii-amine catalysts kunye nee-metal-based catalysts.
IiCatalysts zeAmine: Ezi zisetyenziswa kakhulu ekuveliseni ifoam evulekileyo ngenxa yokukwazi kwazo ukulawula ibhalansi phakathi kweempendulo ze-urethane (polyol-isocyanate) kunye ne-urea (water-isocyanate). Imizekelo yee-catalysts ze-amine ibandakanya i-triethylenediamine (TEDA), i-bis(dimethylaminoethyl)ether (BDMAEE), kunye ne-N,N-dimethylcyclohexylamine (DMCHA). Ezi catalysts zinceda ekudaleni isakhiwo se-open-cell ngokuchaphazela ukunyuka kwefoam kunye namaxesha ejeli, ukuqinisekisa ukwakheka kweseli okulinganayo nokulinganayo.
IiCatalysts Ezisekelwe Kwisinyithi: Iikhompawundi ze-Organotin zii-catalysts eziqhelekileyo ezisekelwe kwisinyithi ezisetyenziswa kwimveliso ye-polyurethane foam. Ezi catalysts zikhawulezisa ukusabela kwe-isocyanate-polyol, ziphucula iimpawu zoomatshini kunye nokuzinza kwe-foam. I-Dibutyltin dilaurate (DBTDL) kunye ne-stannous octoate zimizekelo eqhelekileyo yee-catalysts ze-organotin ezisetyenziswa kule nkqubo.
Isiphelo
I-polyurethane foam evulekileyo, enezicelo zayo ezininzi, ixhomekeke kakhulu kwiimpendulo ezichanekileyo nezilawulwayo eziququzelelwa zii-polyurethane catalysts. Ngokuqonda indima yezi catalysts, abavelisi banokuphucula iipropati ze-foam ukuze zihlangabezane neemfuno ezithile zesicelo, ukuqinisekisa ukusebenza okuphezulu kunye nokuthembeka kumashishini ahlukeneyo. Njengomthengisi wee-polyurethane catalysts, sizinikele ekuboneleleni ngezinto ezibalulekileyo ezifunekayo ukuvelisa i-open-cell foam ekumgangatho ophezulu, ukuxhasa ubuchule kunye nokugqwesa kweli candelo liguqukayo.
Ixesha leposi: Juni-11-2024