Cwj pwm:Hydroxyethyl cellulose (HEC CAS: 9004-62-0) yog ntxhiab tsw dawb lossis daj, tsw, thiab yooj yim ntws hmoov. Soluble hauv ob qho dej txias thiab dej kub, tab sis feem ntau insoluble nyob rau hauv feem ntau cov kuab tshuaj emolic. Tus nqi pH hloov me ntsis hauv thaj tsam ntawm 2-12, tab sis cov viscosity txo dhau qhov no.
Tus nqi:Hydroxyethyl cellulose (HEC CAS CAS: 9004-62-0) yog feem ntau siv thickener rau cellulose raws cov inclined organ. Nws yog dej-soluble tsis muaj kev sib xyaw uas muaj peev xwm ua kom zoo rau cov pa, acids, thiab cov enzymes, thiab tuaj yeem hla tsis tau los ntawm cu2 + nyob rau hauv alkaline tej yam kev mob. Nws yog qhov ruaj khov khov, tsis tshwm sim gel thaum cua sov, tsis precipitate nyob rau hauv acidic tej yam kev mob, thiab muaj cov khoom zoo-ua cov cuab yeej. Nws cov kua aqueous tuaj yeem ua rau cov yeeb yaj kiab pob tshab thiab muaj cov tshuaj lom neeg ntawm alkaline, thiab muaj kev sib tw ua yeeb yaj kiab, noo noo khaws cia, noo noo kev tiv thaiv, thiab kev tiv thaiv. Lub luag haujlwm ntawm cov thickeners hauv dej-ua cov inks yog kom tuab. Ntxiv cov thickeners rau tus mem kua nce ntxiv nws viscosity, uas tuaj yeem txhim kho lub cev thiab tshuaj ruaj khov ntawm number cas; Vim tias qhov nce hauv viscosity, cov rheology ntawm tus cwj mem tuaj yeem tswj tau thaum luam ntawv; Cov xim thiab muab tub lim rau hauv cov number cas tsis yooj yim rau nag lossis daus, nce kev cia khoom ruaj khov ntawm dej number case.
Txuj Ci Ntau Lawm: Alkali cellulose yog lub ntuj polymer uas muaj cov pab pawg hydroxyl ntawm txhua lub nplhaib fiber ntau. Cov pab pawg hydroxyl tshaj plaws los tsim hydroxyethyl cellulose. Soak lub paj rwb nyoos linter lossis ua kom zoo nkauj hauv 30% kua alkali, thiab coj nws tawm rau nias tom qab ib nrab ib teev. Nias kom txog thaum Lub Tsev Dej Alkaline Cov dej alkaline nce txog 1: 2.8, thiab tom qab ntawd tsoo nws. Lub crushed alkali cellulose muab tso rau hauv reactor, ntim, nqus tsev, thiab muaj nitrogen. Cov tshuaj lom neeg pheej ua kom yooj yim nqus thiab muaj cov nitrogen los hloov cov huab cua hauv reactor. Nias rau hauv cov dej ua ntej ethylene oxide kua, hla dej txias rau hauv reactor tsho, thiab tswj cov tshuaj tiv thaiv kub txog li 25 ℃ rau tau txais ib tug crude hydroxyethyl cellulose khoom. Cov khoom crude yog ntxuav nrog cawv, neutralized nrog acetic acid rau ph 4-6, thiab cross-txuas nrog glyoxal rau kev laus. Tom qab ntawd ntxuav nrog dej, centrifuge, lub cev qhuav dej, qhuav, thiab zom kom muaj hydroxyethyl cellulose.
Lub sijhawm Post: Mar-28-2023
