1. Isishwankathelo se-methyl hydroxyethyl cellulose (MHEC)
I-Methyl hydroxyethyl cellulose (MHEC) i-cellulose ether engeyiyo ionic efunyenwe ngokuguqulwa kwe-methylation ngesiseko se-cellulose ye-hydroxyethyl. Ngenxa yesakhiwo sayo esiyingqayizivele se-molecular, i-MHEC ine-solubility efanelekileyo, i-thickening, i-adhesion, i-film-forming and surface work, kwaye isetyenziswe ngokubanzi kwiingubo, izinto zokwakha, iikhemikhali zemihla ngemihla kunye nezinye iindawo.
2. Isishwankathelo sezihluli zepeyinti
Iipeyinti zepeyinti ngamalungiselelo ekhemikhali asetyenziselwa ukususa iingubo ezingaphezulu njengesinyithi, iinkuni kunye neeplastiki. Abahluli bepeyinti besintu ubukhulu becala baxhomekeke kwiinkqubo ezirhabaxa zokunyibilikisa, ezifana nedichloromethane kunye netoluene. Nangona ezi khemikhali zisebenza kakuhle, zineengxaki ezifana nokuguquguquka okuphezulu, ubuthi kunye neengozi zokusingqongileyo. Ngokunyuka kwemithetho yokusingqongileyo engqongqo kunye nokuphuculwa kweemfuno zemeko yendawo yokusebenza, izihlunu zepeyinti ezisekwe emanzini kunye nezinetyhefu ephantsi ziye zaba yeyona nto iphambili kwintengiso.
3. Indlela yokusebenza ye-MHEC kwizihluli zepeyinti
Kwiipeyinti zepeyinti, i-MHEC idlala indima ebalulekileyo njenge-thickener kunye ne-rheology modifier:
Isiphumo sokuqina:
I-MHEC inesiphumo esihle sokuqina kwiinkqubo ezisekelwe emanzini. Ngokulungelelanisa i-viscosity yepeyinti yepeyinti, i-MHEC inokwenza i-stripper yepeyinti ibambelele kwindawo ethe nkqo okanye ethambekele ngaphandle kokugoba. Le propati ibaluleke kakhulu ngexesha lokusetyenziswa kweepeyinti zepeyinti kuba ivumela i-stripper yepeyinti ukuba ihlale kwindawo ekujoliswe kuyo ixesha elide, ngaloo ndlela iphucula umphumo wokuqhawula ipeyinti.
Zinzise inkqubo yokunqunyanyiswa:
Iipeyinti zepeyinti zihlala zinezithako ezahlukeneyo ezisebenzayo, ezinokuthi zihlume okanye zihlale ngexesha lokugcina. Ngokuphucula i-viscosity yesakhiwo sesisombululo, i-MHEC inokuthintela ngokufanelekileyo ukuchithwa kweengqungquthela eziqinileyo, ukugcina ukusabalalisa okufanayo kwezithako, kunye nokuqinisekisa ukusebenza okuzinzile kwepeyinti yepeyinti.
Lungisa iimpawu zerheological:
Ukusetyenziswa kweepeyinti zepeyinti kufuna ukuba ibe neempawu ezintle ze-rheological, oko kukuthi, inokuhamba kakuhle xa kunyanzeliswa amandla angaphandle, kodwa inokuqina ngokukhawuleza xa imile. I-molecular chain structure ye-MHEC inika iipropati ezintle zokunciphisa i-shear, oko kukuthi, kumazinga aphezulu e-shear, i-viscosity yesisombululo iya kuncipha, okwenza kube lula ukusebenzisa ipeyinti yepeyinti; ngelixa kwizinga eliphantsi lokucheba okanye kwi-static state, isisombululo se-viscosity siphezulu, esinceda izinto eziphathekayo zenze i-coating efanayo kwindawo ekujoliswe kuyo.
Ukukhuthaza ukwenziwa kwefilimu:
Ngethuba lenkqubo yokuqhawula ipeyinti, i-MHEC inokunceda umgca wepeyinti wenze ifilimu efanayo kwindawo ekujoliswe kuyo. Le filimu ayinako nje ukwandisa ixesha lesenzo sezithako ezisebenzayo, kodwa iphinde ikhulise amandla okugquma i-stripper yepeyinti ukuya kwinqanaba elithile, ukwenzela ukuba ikwazi ukungena ngokufanelekileyo kuzo zonke iindawo zokugqoka.
4. Indlela yokusebenzisa i-MHEC kwiipeyinti zepeyinti
Ukulungiswa kwesisombululo esimanzi:
I-MHEC ihlala ikhona kwifom yepowder kwaye kufuneka ilungiswe kwisisombululo samanzi ngaphambi kokusetyenziswa. Umkhuba jikelele kukongeza kancinci i-MHEC kumanzi axokozelayo ukunqanda ukuhlangana. Kufuneka kuqatshelwe ukuba i-solubility ye-MHEC iya kuchaphazeleka ngokushisa kwamanzi kunye nexabiso le-pH. Ukushisa kwamanzi aphezulu (50-60 ℃) kunokukhawulezisa inkqubo yokuchithwa kwe-MHEC, kodwa ukushisa okuphezulu kakhulu kuya kuchaphazela ukusebenza kwayo kwe-viscosity.
Idityaniswe kwii-strippers zepeyinti:
Xa ulungiselela ii-strippers zepeyinti, isisombululo samanzi se-MHEC sihlala sidityaniswa ngokucothayo kwisiseko solwelo lwepeyinti phantsi kokuvuselela. Ukuze kuqinisekiswe ukusabalalisa okufanayo, isantya esongezelelweyo se-MHEC akufanele sikhawuleze, kwaye ukuvuselela kufuneka kuqhutyelwe kude kube isisombululo esifanayo sifunyenwe. Le nkqubo idinga ukulawula isantya esishukumisayo ukuthintela ukubunjwa kwamaqamza.
Uhlengahlengiso lwefomula:
Isixa se-MHEC kwiipeyinti zepeyinti ngokuqhelekileyo zihlengahlengiswa ngokwefomula ethile kunye nokusebenza okujoliswe kuyo kwiipeyinti zepeyinti. Isixa esiqhelekileyo sokudibanisa siphakathi kwe-0.1% -1%. Isiphumo sokuqina esinamandla kakhulu sinokubangela ukugquma okungalinganiyo okanye i-viscosity egqithisileyo, ngelixa idosi engonelanga isenokungafezekisi i-viscosity efanelekileyo kunye neempawu ze-rheological, ngoko ke kuyafuneka ukuba kunyuswe ukusetyenziswa kwayo ngovavanyo.
5. Izinto eziluncedo ze-MHEC kwiipeyinti zepeyinti
Ukhuseleko kunye nokhuseleko lokusingqongileyo:
Xa kuthelekiswa ne-thickeners yendabuko, i-MHEC i-ether ye-cellulose engekho i-ionic, ayinayo izinto ezinobuthi kunye neziyingozi, ikhuselekile kumzimba womntu kunye nokusingqongileyo, kwaye ihambelana nolwalathiso lophuhliso lwekhemistri eluhlaza yanamhlanje.
Ukuzinza okugqwesileyo: I-MHEC inozinzo oluhle lweekhemikhali kwi-pH ebanzi (pH 2-12), inokugcina isiphumo esizinzileyo sokuqina kwiinkqubo ezahlukeneyo zokuqhawula ipeyinti, kwaye ayiphazamiseki lula ngamanye amacandelo kwinkqubo.
Ukuhambelana kakuhle: Ngenxa yobume be-MHEC obungeyiyo i-ionic, ihambelana kakuhle nezona zithako ezisebenzayo, aziyi kusebenzisana okanye zibangele ukungazinzi kwenkqubo, kwaye ifanelekile kwiindidi ezahlukeneyo zokuqulunqwa kwepeyinti yepeyinti.
Isiphumo esisebenzayo sokuqina: I-MHEC inokubonelela ngesiphumo esibalulekileyo sokuqina, ngaloo ndlela inciphisa ubungakanani bezinye i-thickeners kwi-stripper yepeyinti, yenza lula ifomula kunye nokunciphisa iindleko.
I-Methyl hydroxyethyl cellulose (MHEC) isetyenziswe ngokubanzi kwi-strippers yepeyinti yanamhlanje ngenxa yokuqina kwayo okugqwesileyo, ukuzinza kunye nokuhambelana. Ngoyilo lwefomula efanelekileyo kunye nokusetyenziswa, i-MHEC inokuphucula kakhulu ukusebenza kweepeyinti zepeyinti, ibenze babonise ukusebenza okuphezulu kunye nokukhuselwa kwendalo kwizicelo eziphathekayo. Kwixesha elizayo, ngophuhliso oluqhubekayo lwetekhnoloji yepeyinti yepeyinti kunye nokuphuculwa ngakumbi kweemfuno zokhuseleko lokusingqongileyo, amathuba okusetyenziswa kwe-MHEC kwiipeyinti zepeyinti ziya kuba zibanzi.
Ixesha lokuposa: Jun-14-2024