I-Hydroxypropyl starch ether (HPS)futhii-cellulose etherkukhona izithasiselo zamakhemikhali ezimbili ezivamile zokwakha, ezisetshenziswa kabanzi ezintweni zokwakha, ezifana nodaka, impuphu ephuthiwe, i-coatings, njll. Nakuba zinokufana kwezinye izakhiwo, kunomehluko omkhulu ezicini eziningi ezifana nemithombo yempahla eluhlaza, izakhiwo zamakhemikhali, izakhiwo ezibonakalayo. , imiphumela yohlelo lokusebenza, nezindleko.
1. Imithombo yezinto ezibonakalayo kanye nesakhiwo samakhemikhali
I-Hydroxypropyl starch ether (HPS)
I-HPS isuselwe kwisitashi semvelo futhi itholakala ngokusabela kokuguqulwa kwe-etherification. Imikhiqizo yayo eyinhloko ummbila, ukolweni, amazambane nezinye izitshalo zemvelo. Ama-molecule esitashi akhiwa amayunithi e-glucose axhunywe amabhondi e-α-1,4-glycosidic kanye nenani elincane lamabhondi e-α-1,6-glycosidic. Ngemuva kwe-hydroxypropylation, iqembu le-hydrophilic hydroxypropyl lingeniswa esakhiweni samangqamuzana e-HPS, linikeze ukuqina okuthile, ukugcinwa kwamanzi kanye nemisebenzi yokuguqula.
i-cellulose ether
Ama-cellulose ethers asuselwa ku-cellulose yemvelo, njengokotini noma ukhuni. I-Cellulose yakhiwa amayunithi e-glucose axhunywe ngamabhondi e-β-1,4-glycosidic. Ama-cellulose ether ajwayelekile ahlanganisa i-hydroxypropyl methylcellulose (HPMC), i-methylcellulose (MC), i-hydroxyethyl cellulose (HEC), njll. Lezi zinhlanganisela zethula izingxenye ezihlukile ngokusabela kwe-etherification futhi zinokusimama okuphezulu kwamakhemikhali kanye nezakhiwo ezibonakalayo.
2. Izinto ezibonakalayo
Izici zokusebenza ze-HPS
Ukuqina: I-HPS inomphumela omuhle wokujiya, kodwa uma iqhathaniswa ne-cellulose ether, ikhono layo lokujiya libuthakathaka kancane.
Ukugcinwa kwamanzi: I-HPS inokugcinwa kwamanzi okusesilinganisweni futhi ifanele izinto zokwakha eziphansi kuya ezimaphakathi.
Ukusebenza: I-HPS ingathuthukisa ukusebenza kodaka futhi inciphise ukuwohloka ngesikhathi sokwakha.
Ukumelana nezinga lokushisa: I-HPS izwela kakhulu izinga lokushisa futhi ithintwa kakhulu izinga lokushisa elizungezile.
Izici zokusebenza ze-cellulose ethers
Ukuqina: I-Cellulose ether inomphumela oqinile wokujiya futhi ingakhuphula kakhulu i-viscosity yodaka noma i-putty.
Ukugcinwa kwamanzi: I-Cellulose ether inezici ezinhle kakhulu zokugcina amanzi, ikakhulukazi ezindaweni zokushisa eziphakeme, ezinganweba isikhathi sokuvula udaka futhi kuvimbele ukulahlekelwa kwamanzi ngokweqile.
Ukusebenza kahle: I-Cellulose ether inhle kakhulu ekuthuthukiseni ukusebenza kahle futhi inganciphisa ngempumelelo izinkinga ezifana nokuqhekeka kanye nempushana.
Ukumelana nezinga lokushisa: I-Cellulose ether inokuvumelana nezimo eziqinile ekushintsheni kwezinga lokushisa nokusebenza okuzinzile.
3. Imiphumela yohlelo lokusebenza
Umphumela wohlelo lokusebenza weI-HPS
Odaka olomile, i-HPS idlala ikakhulukazi indima yokuthuthukisa ukusebenza, ukuthuthukisa ukugcinwa kwamanzi, nokunciphisa ukuhlukaniswa nokuhlukaniswa. Iyonga futhi ifanele ukusetshenziswa ezimeni ezinezidingo zokulawula izindleko eziphezulu, njengempushana ye-putty yangaphakathi evamile, udaka lokulinganisa phansi, njll.
Umphumela wokusetshenziswa kwe-cellulose ether
Ama-cellulose ethersasetshenziswa kakhulu odakeni olusebenza kahle kakhulu, izinto zokunamathisela zamathayela, izinto ezisekelwe ku-gypsum kanye nezinhlelo zokuvala udonga zangaphandle. Izakhiwo zayo eziphakeme zokuqina nokugcinwa kwamanzi zingathuthukisa kakhulu amandla okubopha kanye nokusebenza okuphikisana nokushelela kwezinto, futhi kufanelekile ikakhulukazi kumaphrojekthi anezidingo eziphezulu ekusebenzeni kokwakhiwa kanye nekhwalithi yomkhiqizo ophelile.
4. Izindleko kanye nokuvikelwa kwemvelo
izindleko:
I-HPS inezindleko eziphansi futhi ifanele ukusetshenziswa ezimakethe ezinganaki amanani. Ama-cellulose ether ayabiza kakhulu, kodwa asebenza kahle kakhulu futhi ayabiza ekufuneni amaphrojekthi wokwakha.
Ukuvikelwa kwemvelo:
Zombili zitholakala ezintweni zemvelo futhi zinezindawo ezinhle zemvelo. Kodwa-ke, ngenxa yokuthi ama-reagents amakhemikhali ambalwa asetshenziswa enqubweni yokukhiqiza ye-HPS, umthwalo wayo wemvelo ungase ube phansi.
5. Isisekelo sokukhetha
Izidingo zokusebenza: Uma unezidingo eziphakeme zokujiya kanye nezindawo zokugcina amanzi, kufanele ukhethe i-cellulose ether; ngezinto zokwakha ezingabizi kakhulu kodwa ezidinga ukuthuthukiswa okuthile ekusebenzeni, ungacabangela ukusebenzisa i-HPS.
Izimo zokusetshenziswa: Ukwakhiwa kwezinga lokushisa eliphezulu, ukwahlukanisa odongeni kwangaphandle, ukunamathela kwamathayili nezinye izimo ezidinga ukusekelwa kokusebenza okuphezulu zifaneleka kakhulu i-cellulose ether; nge-putty evamile yangaphakathi yodonga noma udaka oluyisisekelo, i-HPS inganikeza izixazululo zezomnotho nezisebenzayo.
I-Hydroxypropyl isitashi etherfuthii-cellulose ether ngayinye inezinzuzo zayo futhi idlala indima ehlukene ezintweni zokwakha. Ukukhetha kudinga ukucatshangelwa ngokugcwele ngokusekelwe ezidingweni zokusebenza, ukulawula izindleko, indawo yokwakha nezinye izici zephrojekthi ethile ukuze kuzuzwe umphumela wokusetshenziswa ongcono kakhulu.
Isikhathi sokuthumela: Nov-21-2024