Isitashi ether
I-starch ether, impushana emhlophe ecolisisiwe etholakala emithonjeni yezitshalo zemvelo, ingena kunqubo eyinkimbinkimbi yokuguqulwa ebonakala ngokusabela okukhulu kwe-etherification, elandelwa inqubo eyaziwa ngokuthi ukomiswa kwesifutho. Okwenza i-starch ether ihluke ukwakheka kwayo, okungahlanganisi ama-plasticizer, okwenza kube ukukhetha okukhangayo kwezinhlelo zokusebenza ezihlukahlukene emikhakheni yokudla, yezemithi, neyezimboni. Isici sayo esiyinhloko sisesilinganisweni saso esimangalisayo sokujiya ngokushesha, isici esithuthukisa kakhulu ukusetshenziswa kwayo okusebenzayo ezinhlobonhlobo zokubunjwa. Leli khono lokujiya ngokushesha libaluleke kakhulu ezimeni lapho izinhlelo zokusebenza ezizwelayo isikhathi zidinga ukuguqulwa okusheshayo kokuvumelana kwengxube, okuvumela izinqubo zokukhiqiza eziphumelelayo ngaphandle kokuyekethisa ikhwalithi.
Isitashi i-ether futhi iyaziqhenya nge-viscosity emaphakathi, ebonisa ibhalansi eyenza ibe nezinto eziningi ezisetshenziswayo eziningi. Le viscosity yenza kube lula amandla ayo okugcina amanzi ngempumelelo, okubalulekile ezinhlelweni ezidinga okuqukethwe komswakama ukuzinza noma ukusebenza. Izici ezisebenzayo zokujiya kanye nokugcinwa kwamanzi zisho ukuthi inani elincane kuphela le-starch ether elidingekayo ukuze kuzuzwe imiphumela efiselekayo, engaholeli nje kuphela ekongeni izindleko kodwa futhi enciphisa umkhondo wemvelo ohambisana nezinqubo zokukhiqiza. Ngokudinga amazinga aphansi okwengeza, isitashi i-ether sinomthelela ekwakhiweni okusimeme futhi okuvumelana nemvelo, ngaleyo ndlela kuhehe izimboni ezigxile ekwehliseni imfucuza kanye nokwenza kahle ukusetshenziswa kwezinsiza.
Ngaphezu kwalokho, isitashi ether sithuthukisa kakhulu ukumelana ne-sag yezinto, ikakhulukazi lezo ezithambekele ekugelezeni kwamandla adonsela phansi noma ekuwohlokeni. Leli khono elimelene nokulengiswa kwamanje livumela imikhiqizo ukuthi ilondoloze isimo sayo esakhiwe ngesikhathi sokugcinwa nokusetshenziswa, okubalulekile ezimbonini ezifana nezokwakha nokunakekela komuntu siqu, lapho ubuqotho bomkhiqizo bubalulekile ekusebenzeni nokwaneliseka kwabathengi. Ngokunciphisa ubungozi bokuhlukaniswa noma ukuxazululwa, i-starch ether iqinisekisa ukuthi imikhiqizo yokugcina iletha imiphumela engashintshi futhi igcina ikhwalithi kuyo yonke impilo yayo yeshalofu.
Enye inzuzo evelele yesitashi ether ukuthambisa kwayo okuyingqayizivele. Le ndawo ithuthukisa ukusebenza kokusebenza kwezinto, idale ukuhamba komsebenzi okushelelayo ngesikhathi sokucubungula. Ezilungiselelweni zokukhiqiza, lapho imishini nemishini isebenza ngokuqhubekayo, ukungezwa kwe-starch ether kungaholela ekwenyukeni kokusebenza kahle kanye nokuncipha kokuguga kwemishini. Ukuphatha okushelelayo akusizi nje kuphela izilinganiso zokukhiqiza ezingcono kodwa futhi kuthuthukisa ulwazi lomsebenzisi, okwenza kube lula ku-opharetha ukusebenza ngezinto ngaphandle kokuhlangabezana nokunamathela okungafunwa noma ukunqwabelana.
Izinzuzo ezixubile zesitashi ether ziyibeka njengengxenye ebalulekile kuzo zonke izimboni ezihlukahlukene. Inhlanganisela yokujiya kwayo okuphumelelayo, i-viscosity emaphakathi, ukugcinwa komswakama, ukumelana nokuntenga, kanye nokuthambisa kukhombisa ukuguquguquka kwayo nokusebenza kwayo kukhemistri yokwakheka. Njengoba izimboni ziqhubeka nokuthuthuka futhi zifuna izixazululo ezintsha ezibonisa kokubili ikhwalithi nokusimama, isitashi ether sigqama njengesithako esinokwethenjelwa esihlangabezana nemibandela eqinile yokusebenza kuyilapho sibambelela ezenzweni zokuqaphela imvelo.
Sengiphetha, i-starch ether iyisibonelo sokuhlangana kwemvelo nobuchwepheshe, iguqula okuphuma kokunye kwezitshalo zemvelo kube izinto ezisebenzayo, ezisebenza kahle kakhulu ezithuthukisa izinhlelo zokusebenza ezihlukene zezimboni. Izinzuzo zayo zidlulela ngale kwezithako eziyisisekelo; kuhlanganisa ukuzibophezela ekusebenzeni kahle, ukusimama, kanye nekhwalithi, okwenza kube ukukhetha okuncanyelwayo kubakhiqizi abahlose ukusungula izinto ezintsha kuyilapho begcina isibopho sezemvelo. Ngakho-ke, ukuhlola okuqhubekayo kanye nokusetshenziswa kwesitashi ether kungenzeka kuqhubekisele phambili inqubekelaphambili emikhakheni eminingi, kugcizelela ukubaluleka kwayo okukhulayo endaweni yokubunjwa kwesimanje kanye nokuthuthukiswa komkhiqizo.
