Isitashi i-ether yigama elivamile lekilasi lesitashi esiguquliwe esiqukethe izibopho ze-ether ku-molecule, eyaziwa nangokuthi isitashi se-etherified, esisetshenziswa kakhulu kwezokwelapha, ukudla, izindwangu, ukwenza iphepha, amakhemikhali ansuku zonke, i-petroleum nezinye izimboni. Namuhla sichaza ngokuyinhloko indima yesitashi ether odakeni.
Isingeniso se-Starch Ether
Okuvame kakhulu futhi okuvame ukusetshenziswa yisitashi samazambane, isitashi se-tapioca, isitashi sombila, isitashi sikakolweni, njll. Uma kuqhathaniswa nesitashi sokusanhlamvu esinamafutha aphezulu kanye nokuqukethwe kwamaprotheni, isitashi sesitshalo sezimpande esifana namazambane kanye ne-tapioca isitashi simsulwa kakhulu.
Isitashi siyinhlanganisela ye-polysaccharide macromolecular eyakhiwe yi-glucose. Kunezinhlobo ezimbili zama-molecule, aqondile futhi anegatsha, abizwa ngokuthi i-amylose (cishe ama-20%) kanye ne-amylopectin (cishe ama-80%). Ukuze kuthuthukiswe izakhiwo zesitashi ezisetshenziswa ezintweni zokwakha, izindlela ezingokwenyama nezamakhemikhali zingasetshenziswa ukuyiguqula ukuze izakhiwo zayo zifaneleke kakhulu ngezinjongo ezahlukene zezinto zokwakha.
Isitashi se-Etherified sihlanganisa izinhlobo ezahlukene zemikhiqizo. Okufana ne-carboxymethyl starch ether (CMS), i-hydroxypropyl starch ether (HPS), i-hydroxyethyl isitashi ether (HES), i-cationic isitashi ether, njll. I-hydroxypropyl isitashi ether evame ukusetshenziswa.
Indima ye-hydroxypropyl isitashi ether odakeni
1) Khulisa udaka, ukhuphule i-anti-sagging, anti-sagging kanye nezakhiwo ze-rheological zodaka.
Isibonelo, ekwakhiweni kwe-adhesive tile, putty, kanye ne-plastering mortar, ikakhulukazi manje lapho ukufafaza ngomshini kudinga uketshezi oluningi, njengodaka olusekelwe ku-gypsum, kubaluleke kakhulu (i-gypsum efafazwe ngomshini idinga ukumanzi okuphezulu kodwa izobangela ukuwohloka okukhulu. , isitashi sika-Ether singenza lokhu kuntuleka).
Uketshezi kanye nokumelana ne-sag kuvame ukuphikisana, futhi ukwanda kwe-fluidity kuzoholela ekwehleni kokumelana ne-sag. Udaka olunezici ze-rheological lungakuxazulula kahle lokho kuphikisana, okungukuthi, lapho kusetshenziswa amandla angaphandle, i-viscosity iyancipha, ithuthukise ukusebenza nokusebenza kahle, futhi lapho amandla angaphandle ehoxiswa, i-viscosity iyanda futhi ukumelana nokunciphisa kuyathuthukiswa.
Ngomkhuba wamanje wokwanda kwendawo yamathayili, ukwengeza isitashi ether kungathuthukisa ukumelana nokushelela kokunamathela kwethayela.
2) Amahora okuvula anwetshiwe
Ngezinto zokunamathisela zamathayili, zingahlangabezana nezidingo zokunamathisela okukhethekile kwamathayela (I-Class E, i-20min enwetshwe ku-30min ukuze ifinyelele ku-0.5MPa) enweba isikhathi sokuvula.
Izakhiwo zangaphezulu ezithuthukisiwe
Isitashi i-ether singenza ingaphezulu lesisekelo segypsum nosimende bushelelezi, kube lula ukulisebenzisa, futhi linomphumela omuhle wokuhlobisa. Kubaluleke kakhulu ukuplasta udaka nodaka oluncane lokuhlobisa olufana ne-putty.
Indlela yokusebenza ye-hydroxypropyl starch ether
Lapho isitashi se-ether sincibilika emanzini, sizohlakazwa ngokufanayo ohlelweni lodaka lukasimende. Njengoba i-molecule ye-starch ether inesakhiwo senethiwekhi futhi ikhokhiswa kabi, izodonsa izinhlayiya zikasimende ezikhokhiswa kahle futhi isebenze njengebhuloho lenguquko ukuze ixhume usimende, ngaleyo ndlela inikeze Inani elikhulu lokukhiqiza le-slurry lingathuthukisa i-anti-sag noma i-anti-slip. umphumela.
Umehluko phakathi kwe-hydroxypropyl starch ether ne-cellulose ether
1. I-ether yesitashi ingathuthukisa ngempumelelo izakhiwo zokulwa nokushelela kanye nokushelela kodaka
I-cellulose ether ngokuvamile ingathuthukisa kuphela i-viscosity nokugcinwa kwamanzi kwesistimu kodwa ayikwazi ukuthuthukisa izakhiwo zokulwa nokucwila kanye nokunqanda ukushelela.
2. Ukuqina kanye ne-viscosity
Ngokuvamile, i-viscosity ye-cellulose ether icishe ibe amashumi ezinkulungwane, kuyilapho i-viscosity yesitashi ether ingamakhulu ambalwa kuya ezinkulungwaneni ezimbalwa, kodwa lokhu akusho ukuthi isitashi ether sinempahla enamandla yokungenisa umoya, kuyilapho isitashi ether singenayo indawo yokungenisa umoya. .
5. Isakhiwo se-molecule ye-cellulose ether
Nakuba kokubili isitashi kanye ne-cellulose kwakhiwa ama-molecule e-glucose, izindlela zabo zokuqamba zihlukile. Ukuma kwawo wonke ama-molecule e-glucose kusitashi kuyefana, kuyilapho lokho kwe-cellulose kuphambene, futhi ukuma kwe-molecule ye-glucose eseduze kuphambene. Lo mehluko wesakhiwo uphinde unqume umehluko ezindaweni ze-cellulose nesitashi.
Isikhathi sokuthumela: Apr-10-2023