I-Hydroxyethyl Cellulose Physical and Chemical Properties
Izakhiwo zokubukeka Lo mkhiqizo unomucu omhlophe kuya kokuphuzi okhanyayo noma oqinile oyimpuphu, awunabuthi futhi awunambitheki
Iphoyinti lokuncibilika 288-290 °C (dec.)
Ukuminyana 0.75 g/mL ku-25 °C(lit.)
Ukuncibilika Kuncibilika emanzini. Ayincibiliki kuzincibilikisi ezivamile zemvelo. Iyancibilika emanzini abandayo nasemanzini ashisayo, futhi ngokuvamile ayincibiliki kuzincibilikisi eziningi eziphilayo. I-viscosity ishintsha kancane kububanzi bevelu engu-PH 2-12, kodwa i-viscosity yehla ngale kwalolu bubanzi. Inemisebenzi yokujiya, ukumisa okwesikhashana, ukubopha, ukufaka emulsifying, ukuhlakaza, nokugcina umswakama. Izixazululo kumabanga ahlukene we-viscosity zingalungiswa. Inoncibilika kahle kasawoti kuma-electrolyte.
Njenge-surfactant engeyona i-ionic, i-hydroxyethyl cellulose inalezi zinto ezilandelayo ngaphezu kokujiya, ukumisa okwesikhashana, ukubopha, ukuntanta, ukwenza ifilimu, ukuhlakazeka, ukugcina amanzi kanye nokuhlinzeka ngama-colloid avikelayo:
1. I-HEC inyibilika emanzini ashisayo noma emanzini abandayo, izinga lokushisa eliphezulu noma abilayo ngaphandle kwemvula, ukuze ibe nohlu olubanzi lwezimpawu ze-solubility kanye ne-viscosity, kanye ne-gelation engashisi;
2. Ayiyona i-ionic futhi ingahlala nohlu olubanzi lwama-polymers ancibilika emanzini, ama-surfactants, nosawoti. Kuyinto enhle kakhulu ye-colloidal thickener yezixazululo eziphezulu ze-electrolyte;
3. Umthamo wokugcina amanzi uphakeme ngokuphindwe kabili kunalowo we-methyl cellulose, futhi unokulawula ukugeleza okungcono.
4. Uma kuqhathaniswa ne-methyl cellulose eyaziwayo kanye ne-hydroxypropyl methyl cellulose, ikhono lokuhlakaza le-HEC libi kakhulu, kodwa ikhono le-colloid lokuvikela liqine kakhulu.
Izidingo zobuchwepheshe namazinga ekhwalithi ye-hydroxyethyl cellulose
Izinto: I-Index molar substitution (MS) 2.0-2.5 Umswakama (%) ≤5 Amanzi angancibiliki (%) ≤0.5 PH inani 6.0-8.5 Heavy metal (ug/g) ≤20 Umlotha (%) ≤5 Viscosity (mpa. s) 2% 20 ℃ isixazululo esinamanzi 5-60000 lead (%) ≤0.001
Ukusetshenziswa kwe-hydroxyethyl cellulose
【Sebenzisa oku-1】Isetshenziswa njenge-surfactant, i-latex thickener, i-colloidal protective agent, i-oil exploration fracturing fluid, i-polystyrene ne-polyvinyl chloride dispersant, njll.
[Sebenzisa 2] Isetshenziswa njengesinciphisi nesinciphisi sokulahlekelwa uketshezi kuketshezi lokumba olusekelwe emanzini kanye noketshezi oluphelele, futhi inomphumela osobala wokujiya oketshezini lokumba amanzi ane-brine. Ingasetshenziswa futhi njengesinciphisi sokulahlekelwa uketshezi losimende womthombo wamafutha. Ingaxhunyaniswa ne-polyvalent metal ions ukwenza ijeli.
[Sebenzisa 3] Lo mkhiqizo usetshenziswa njenge-polymeric dispersant ye-gel fracturing fluid esekelwe emanzini, i-polystyrene ne-polyvinyl chloride ekumbiweni kwe-fracturing. Ingasetshenziswa futhi njenge-emulsion thickener embonini yepende, i-hygrostat embonini ye-electronics, i-anticoagulant ye-cement kanye ne-ejenti yokugcina umswakama embonini yezokwakha. I-Ceramic industry glazing kanye ne-toothpaste binder. Ibuye isetshenziswe kabanzi ekunyatheliseni nasekudayeni, izindwangu, ukwenza amaphepha, imithi, inhlanzeko, ukudla, ugwayi, izibulala-zinambuzane kanye nezinto ezicisha umlilo.
[Sebenzisa i-4] Isetshenziswa njenge-surfactant, i-colloidal protective agent, i-emulsification stabilizer ye-vinyl chloride, i-vinyl acetate namanye ama-emulsions, kanye ne-viscosifier, i-dispersant, ne-dispersion stabilizer ye-latex. Isetshenziswa kakhulu ekwenzeni izinto zokumboza, imicu, ukudaya, ukwenza amaphepha, izimonyo, imithi, izibulala-zinambuzane, njll. Iphinde ibe nokusetshenziswa okuningi ekuhloleni uwoyela nasembonini yemishini.
【Sebenzisa 5】I-Hydroxyethyl cellulose inemisebenzi engaphezulu, ukujiya, ukumisa okwesikhashana, ukubopha, ukwenza ifilimu, ukwakheka kwefilimu, ukusabalalisa, ukugcinwa kwamanzi kanye nokuhlinzeka ngokuvikeleka ekulungisweni kwezemithi okuqinile noketshezi.
Izicelo ze-hydroxyethyl cellulose
Isetshenziswa ekuhlanganiseni kwezakhiwo, izimonyo, umuthi wokuxubha, ama-surfactants, ama-latex thickeners, ama-colloidal protective agents, uketshezi oluqhekeka uwoyela, i-polystyrene ne-polyvinyl chloride dispersants, njll.
I-Hydroxyethyl Cellulose Material Safety Data Sheet (MSDS)
1. Umkhiqizo unengozi yokuqhuma kothuli. Lapho uphatha amanani amakhulu noma ngobuningi, qaphela ukuthi ugweme ukufakwa uthuli nokumiswa emoyeni, futhi ugweme ukushisa, izinhlansi, amalangabi nogesi omile. 2. Gwema i-methylcellulose powder ekungeneni nasekuthinteni amehlo, futhi gqoka imaski yokuhlunga nezibuko zokuphepha ngesikhathi sokusebenza. 3. Umkhiqizo uyashelela kakhulu uma umanzi, futhi impushana echithekile ye-methylcellulose kufanele ihlanzwe ngesikhathi futhi ukwelashwa okunqanda ukushelela kufanele kwenziwe.
Isitoreji nezici zokuhamba ze-hydroxyethyl cellulose
Ukupakisha: izikhwama ezinezingqimba ezimbili, isikhwama sephepha esiyinhlanganisela yangaphandle, isikhwama sefilimu se-polyethylene sangaphakathi, isisindo senetha 20kg noma 25kg isikhwama ngasinye.
Isitoreji nezinto zokuhamba: Gcina endaweni engenawo umoya neyomile endlini, futhi unake umswakama. Ukuvikelwa kwemvula nelanga ngesikhathi sokuthutha.
Indlela yokulungiselela i-hydroxyethyl cellulose
Indlela yoku-1: Gcoba ama-linter kakotini aluhlaza noma u-pulp ocolisisiwe ku-lye engu-30%, uyikhiphe ngemva kwesigamu sehora, bese ucindezela. Cindezela kuze kube yilapho isilinganiso sokuqukethwe kwamanzi e-alkali sifinyelela ku-1:2.8, bese uya kudivayisi yokuchoboza ukuze uwachoboze. Faka i-alkali fibre echotshoziwe kugedlela lokusabela. Ivalwe futhi ikhishwe, igcwele i-nitrogen. Ngemva kokufaka umoya eketelani nge-nitrogen, cindezela oketshezini olupholile lwe-ethylene oxide. Phendula ngaphansi kokupholisa ku-25°C amahora angu-2 ukuze uthole i-hydroxyethyl cellulose engahluziwe. Geza umkhiqizo ongahluziwe ngotshwala futhi ulungise inani le-pH libe ngu-4-6 ngokungeza i-acetic acid. Faka i-glyoxal yokuxhumanisa nokuguga, geza ngokushesha ngamanzi, futhi ekugcineni i-centrifuge, yome, futhi ugaye ukuze uthole i-hydroxyethyl cellulose enosawoti omncane.
Indlela yesi-2: I-Alkali cellulose iyi-polymer yemvelo, iringi ngayinye ye-fiber base iqukethe amaqembu amathathu e-hydroxyl, iqembu elisebenza kakhulu le-hydroxyl lisabela ukwenza i-hydroxyethyl cellulose. Gcoba ama-linter kakotini aluhlaza noma i-pulp ecolisisiwe ku-30% ye-caustic soda enguketshezi, yikhiphe bese ucindezela ngemva kwesigamu sehora. Cindezela kuze kube yilapho isilinganiso samanzi ane-alkali sifinyelela ku-1: 2.8, bese uchoboza. Faka i-alkali cellulose egayiwe eketelani lokusabela, ulivale, ucofe, uligcwalise nge-nitrogen, bese uphinda ukugcwaliswa kwe-vacuuming kanye nokugcwalisa i-nitrogen ukuze ubuyisele ngokuphelele umoya eketelani. Cindezela oketshezini lwe-ethylene oxide esele lupholile, faka amanzi okupholisa ebhantshini legedlela lokusabela, bese ulawula ukusabela cishe ku-25°C amahora amabili ukuze uthole i-hydroxyethyl cellulose. Umkhiqizo ongahluziwe ugezwa ngotshwala, uncishiswe ube yi-pH 4-6 ngokungeza i-acetic acid, futhi uxhunywe ne-glyoxal yokuguga. Ngemuva kwalokho igezwa ngamanzi, iphelelwe amanzi nge-centrifugation, yomiswe futhi igaywe ukuze ithole i-hydroxyethyl cellulose. Ukusetshenziswa kwempahla eluhlaza (kg/t) ama-linter kakotini noma i-pulp ephansi 730-780 liquid caustic soda (30%) 2400 ethylene oxide 900 alcohol (95%) 4500 acetic acid 240 glyoxal (40%) 100-300
I-Hydroxyethyl cellulose iyimpushana emhlophe noma ephuzi engenaphunga, ayinambitheki futhi egeleza kalula, inyibilika emanzini abandayo nasemanzini ashisayo, ngokuvamile engancibiliki ezincibilikisini eziningi eziphilayo.
IHydroxyethyl cellulose (HEC) iyi-fibrous emhlophe noma ekhanyayo, engenaphunga, engenabuthi noma eqinile eyimpuphu, elungiswa ngokusabela kwe-etherification ye-alkaline cellulose ne-ethylene oxide (noma i-chlorohydrin). I-Nonionic soluble cellulose ethers. Ngenxa yokuthi i-HEC inezakhiwo ezinhle zokuqina, ukumisa, ukuhlakaza, ukuhlanganisa, ukubopha, ukwenza ifilimu, ukuvikela umswakama nokuhlinzeka nge-colloid evikelayo, iye yasetshenziswa kabanzi ekuhloleni amafutha, ukugqoka, ukwakhiwa, imithi, ukudla, izindwangu, iphepha kanye ne-polymerization. nezinye izinkambu. Isilinganiso se-40 se-mesh sieving ≥ 99%; izinga lokushisa elithambile: 135-140 ° C; ukuminyana okubonakalayo: 0.35-0.61g/ml; izinga lokushisa lokubola: 205-210 ° C; ijubane elishisayo eliphansi; izinga lokushisa elilinganayo: 23°C; 50% 6% at rh, 29% at 84% rh.
Ungayisebenzisa kanjani i-hydroxyethyl cellulose
kwengezwe ngokuqondile ngesikhathi sokukhiqiza
1. Faka amanzi ahlanzekile ebhakedeni elikhulu elifakwe umxube wokugunda okuphezulu. i
I-Hydroxyethyl cellulose
2. Qala ukunyakazisa ngokuqhubekayo ngesivinini esiphansi bese usihlunga kancane kancane i-hydroxyethyl cellulose esixazululweni ngokulinganayo. i
3. Qhubeka ugoqa kuze kube yilapho zonke izinhlayiya sezicwile. i
4. Bese wengeza i-ejenti yokuvikela umbani, izithasiselo eziyisisekelo ezifana nezingulube, izinsiza zokusabalalisa, amanzi e-ammonia. i
5. Hlanganisa kuze kube yilapho yonke i-cellulose ye-hydroxyethyl ichitheka ngokuphelele (i-viscosity yesisombululo ikhula kakhulu) ngaphambi kokwengeza ezinye izingxenye kufomula, futhi ugaye kuze kube umkhiqizo ophelile.
Ifakwe utshwala bukamama
Le ndlela iwukulungiselela ugologo kamama ngokugxila okuphezulu kuqala, bese ubufaka kupende we-latex. Inzuzo yale ndlela yukuthi inokuguquguquka okukhulu futhi ingafakwa ngokuqondile kupende ophelile, kodwa kufanele igcinwe kahle. Izinyathelo zifana nezinyathelo 1-4 ku-Method 1, umehluko wukuthi asikho isidingo sokuxubha kuze kube yilapho sihlakazeka ngokuphelele sibe yisixazululo se-viscous.
Iphalishi le-phenology
Njengoba izinyibilikisi zemvelo zingama-solvents ampofu e-hydroxyethyl cellulose, lezi zinyibilikisi eziphilayo zingasetshenziswa ukulungisa iphalishi. Izincibilikisi eziphilayo ezisetshenziswa kakhulu uketshezi lwemvelo olufana ne-ethylene glycol, i-propylene glycol kanye nezakhi zefilimu (ezifana ne-ethylene glycol noma i-diethylene glycol butyl acetate) ekwenziweni kopende. Amanzi eqhwa nawo awasincibilikisi esibi, ngakho-ke amanzi eqhwa avame ukusetshenziswa kanye noketshezi oluphilayo ukuze kulungiswe iphalishi. I-hydroxyethyl cellulose yephalishi ingafakwa ngokuqondile kupende, futhi i-hydroxyethyl cellulose ihlukaniswe futhi yavuvukala ephalishi. Uma yengezwe kupende, iyancibilika ngokushesha futhi isebenze njenge-thickener. Ngemuva kokungeza, qhubeka ugqugquzela kuze kube yilapho i-hydroxyethyl cellulose ichitheka ngokuphelele futhi ifana. Ngokuvamile, iphalishi lenziwa ngokuxuba izingxenye eziyisithupha ze-organic solvent noma amanzi eqhwa nengxenye eyodwa ye-hydroxyethyl cellulose. Ngemuva kwemizuzu engaba ngu-6-30, i-hydroxyethyl cellulose izokwenziwa i-hydrolyzed futhi ivuvuke ngokusobala. Ehlobo, izinga lokushisa lamanzi ngokuvamile liphezulu kakhulu, ngakho-ke akufanelekile ukusebenzisa iphalishi.
Izinyathelo zokuphepha ze-hydroxyethyl cellulose
Njengoba i-hydroxyethyl cellulose ehlanjululwe phezulu iyimpushana noma i-cellulose eqinile, kulula ukuyiphatha futhi iyincibilikise emanzini inqobo nje uma izinto ezilandelayo zinakwa. i
1. Ngaphambi nangemva kokwengeza i-hydroxyethyl cellulose, kufanele inyakaziswe ngokuqhubekayo kuze kube yilapho isisombululo sisobala ngokuphelele futhi sicacile. i
2. Kumele ihlungwe kancane kancane ethangini lokuxuba, ungafaki ngokuqondile inani elikhulu le-hydroxyethyl cellulose noma i-hydroxyethyl cellulose eyenze izigaxa namabhola ethangini lokuxuba. 3. Izinga lokushisa lamanzi kanye nenani le-PH emanzini kunobudlelwane obusobala nokuqedwa kwe-hydroxyethyl cellulose, ngakho-ke kufanele kuqashelwe ngokukhethekile. i
4. Ungafaki izinto ezine-alkali engxubeni ngaphambi kokuba i-hydroxyethyl cellulose powder ifudunyezwe emanzini. Ukwenyusa inani le-pH ngemuva kokufudumala kuzosiza ukuncibilika. i
5. Ngokusemandleni akho, engeza i-anti-fungal agent ngokushesha ngangokunokwenzeka. i
6. Uma usebenzisa i-high-viscosity hydroxyethyl cellulose, ukugxila kotshwala kamama akufanele kube ngaphezu kuka-2.5-3%, ngaphandle kwalokho utshwala bomama buyoba nzima ukuphatha. I-hydroxyethyl cellulose ngemuva kokwelashwa ngokuvamile akulula ukwenza izigaxa noma ama-sphere, futhi ngeke yakhe ama-spherical colloids angancibiliki ngemva kokungeza amanzi.
Ngokuvamile isetshenziswa njenge-thickener, i-ejenti evikelayo, i-adhesive, stabilizer kanye nesengezo sokulungiselela i-emulsion, i-jelly, amafutha okugcoba, i-lotion, i-eye cleanser, i-suppository kanye nethebhulethi, futhi isetshenziswa njengejeli le-hydrophilic kanye nezinto zamathambo 1. Ukulungiswa kwe-skeleton- thayipha amalungiselelo okukhululwa okuqhubekayo. Ingasetshenziswa futhi njengesiqinisi ekudleni.
Isikhathi sokuthumela: Feb-02-2023