I-Hydroxyethyl cellulose (HEC) iyisithako esimhlophe noma esiphuzi esikhanyayo, esingenaphunga, esingenabo ubuthi, esine-fibrous noma esiwuphuphu. Yenziwe ngama-linters kakotini aluhlaza noma i-pulp ecociwe efakwe ku-30% we-caustic soda ewuketshezi. Ngemva kwesigamu sehora, iyakhishwa bese icindezelwa. Cindezela kuze kube yilapho isilinganiso samanzi e-alkaline sifinyelela ku-1:2.8, bese siyichoboza. Ilungiswa ngokusabela kwe-etherification futhi ingeye-non-ionic soluble cellulose ethers. I-Hydroxyethyl cellulose iyisithako esibalulekile kupende we-latex. Ake sigxile endleleni yokusebenzisa i-hydroxyethyl cellulose HEC kupende we-latex kanye nezinyathelo zokuphepha.
1. Ifakwe utshwala obungumama ukuze isetshenziswe: qala usebenzise i-hydroxyethyl cellulose HEC ukulungisa utshwala obungumama obunomthamo ophezulu, bese uyifaka emkhiqizweni. Inzuzo yale ndlela ukuthi inokuguquguquka okukhulu futhi ingafakwa ngqo emkhiqizweni oqediwe, kodwa kumele igcinwe kahle. Izinyathelo zale ndlela zifana nezinyathelo eziningi eziku-method 2; umehluko ukuthi asikho isidingo se-agitator eshefa kakhulu, futhi amanye ama-agitator anamandla anele okugcina i-hydroxyethyl cellulose ihlakazeke ngokulinganayo esixazululweni angaqhubeka ngaphandle kokuyeka Hlanganisa kuze kube yilapho incibilika ngokuphelele ibe yisisombululo esiqinile. Kodwa-ke, kufanele kuqashelwe ukuthi i-fungicide kumele ifakwe ku-aquilator engumama ngokushesha okukhulu.
2. Faka ngqo ngesikhathi sokukhiqiza: le ndlela ilula kakhulu futhi ithatha isikhathi esifushane kakhulu. Faka amanzi ahlanzekile ebhakedeni elikhulu elinomshini wokuxuba osezingeni eliphezulu. Qala ukuxuba njalo ngesivinini esiphansi bese uhlinza kancane kancane i-hydroxyethyl cellulose engxubeni ngokulinganayo. Qhubeka uvuselela kuze kube yilapho zonke izinhlayiya zimanzi. Bese ufaka izithasiselo kanye nezinye izithako ezahlukahlukene. Njengemibala, izinsiza zokuhlakaza, amanzi e-ammonia, njll. Hlanganisa kuze kube yilapho yonke i-hydroxyethyl cellulose HEC ichitheka ngokuphelele (i-viscosity yesisombululo iyanda ngokusobala) bese ufaka ezinye izingxenye kufomula yokusabela.
Njengoba i-hydroxyethyl cellulose HEC ephathwe phezulu iqinile njengempuphu noma i-fibrous, lapho ulungisa i-hydroxyethyl cellulose mother liquor, naka amaphuzu alandelayo:
(1) Uma usebenzisa i-high-viscosity hydroxyethyl cellulose HEC, ukuhlushwa kotshwala obungumama akufanele kube ngaphezu kuka-2.5-3% (ngesisindo), ngaphandle kwalokho utshwala obungumama buzoba nzima ukusingatha.
(2) Ngaphambi nangemva kokufaka i-hydroxyethyl cellulose HEC, kumele ivuselelwe njalo kuze kube yilapho ikhambi selicacile futhi licacile ngokuphelele.
(3) Kangangokunokwenzeka, engeza i-antifungal agent kusenesikhathi.
(4) Izinga lokushisa lamanzi kanye nenani le-pH lamanzi kunobuhlobo obusobala nokuncibilika kwe-hydroxyethyl cellulose, ngakho-ke kufanele kunakwe ngokukhethekile.
(5) Ungafaki ezinye izinto ze-alkaline engxubeni ngaphambi kokuba i-hydroxyethyl cellulose powder imanziswe ngamanzi. Ukuphakamisa i-pH ngemva kokumanzisa kuzosiza ukuncibilika.
(6) Kumelwe ihlungwe kancane kancane ethangini lokuxuba, futhi ungangezi inani elikhulu noma ufake ngqo i-hydroxyethyl cellulose eyakhe izigaxa namabhola ethangini lokuxuba.
Izici ezibalulekile ezithinta ukujiya kopende we-latex:
(1) Ukugqwala kwesithambisi-zinto eziphilayo.
(2) Enqubweni yokwenza upende, ingabe ukulandelana kwezinyathelo zokwengeza isithambisi kufanelekile.
(3) Ukuthi inani le-activator engaphezulu namanzi asetshenziswe kufomula yopende kufanelekile yini.
(4) Isilinganiso senani lezinye izinto zokujiya zemvelo nenani le-hydroxyethyl cellulose ekwakhiweni kopende.
(5) Uma kwakheka i-latex, okuqukethwe yi-catalysts ezisele kanye namanye ama-oxide.
(6) Izinga lokushisa liphezulu kakhulu ngesikhathi sokuhlakazeka ngenxa yokuxubha ngokweqile.
(7) Uma amabhamuza omoya amaningi ehlala kupende, kulapho i-viscosity iphakama khona.
I-viscosity ye-hydroxyethyl cellulose HEC ishintsha kancane kububanzi be-pH obungu-2-12, kodwa i-viscosity iyancipha ngale kwalolu bubanzi. Inezimpawu zokujiya, ukumisa, ukubopha, ukuhlanganisa, ukuhlakaza, ukugcina umswakama nokuvikela i-colloid. Izixazululo ezinhlotsheni ezahlukene ze-viscosity zingalungiswa. Azizinzile ngaphansi kokushisa okuvamile kanye nengcindezi, gwema umswakama, ukushisa, kanye nokushisa okuphezulu, futhi zinokuncibilika kukasawoti okuhle kakhulu kuma-dielectric, futhi isixazululo sayo samanzi sivunyelwe ukuqukatha amazinga aphezulu kasawoti futhi sihlala sizinzile.
Isikhathi sokuthunyelwe: Ephreli-01-2023