I-Hydroxypropyl methylcellulose (HPMC)i-nonic, i-cellulose ye-cellulose ehlanganisiwe ye-ether. Ukubukeka kumhlophe ku-powder ephuzi kancane noma izinto ezibonakalayo, ezingenakunambitha, ezingenamzimba, ezingenabuthi, ezinzile, nezinzile futhi zincibilika ngamanzi ukwakha isixazululo esibushelelezi, esibonakalayo nesibonakalayo. Enye yezinto ezibaluleke kakhulu ze-hydroxypropyllylylylykyl methylcellulose kuhlelo lokusebenza ukuthi kwandisa ukubonwa koketshezi. Umphumela wokuqina uncike ezingeni le-polymerization (DP) lomkhiqizo, ukugcwaliseka kwe-cellulose ether kusisombululo esinamanzi, izinga le-shear, kanye nokushisa kwesisombululo. Nezinye izinto.
01
Uhlobo lwe-FPMC luxazululwa ikhambi lamanzi le-HPMC
Ngokuvamile, ukucindezelwa koketshezi ukugeleza kwe-shear kungavezwa njengomsebenzi wamazinga we-shear ƒ (γ), inqobo nje uma kungenjalo kuncike esikhathini. Ngokuya ngohlobo lwe-ƒ (γ), uketshezi lungahlukaniswa ngezinhlobo ezahlukene, okungukuthi: uketshezi lweNewtonian, uketshezi olungapheli, uketshezi lwe-pseudoplastic fluids kanye ne-bingham fluids.
I-Cellulose Afers ihlukaniswe izigaba ezimbili: enye i-ether engeyona eye-cellulose ye-ionic kanti enye i-ionic cellulose ether. I-rheology yalezi zinhlobo ezimbili ze-cellulose afer. SC Naik et al. Uqhube isifundo esiphelele nesihlelekile sokuqhathanisa ku-Hydroxyethyl cellulose kanye ne-sodium carboxymethyl cellulose Solutions. Imiphumela ikhombisile ukuthi zombili izixazululo ze-ether solutions ezingezona ze-ionic cellulose kanye ne-ionic Cellulose ether Solutions kwakuyi-pseudoplastic. Ukugeleza, okungukuthi ukugeleza okungeyona neNewtonian, sondela ku-Newtonia ketshezi kuphela ekugxileni okuphansi kakhulu. I-pseudoplalicity ye-hydroxypropylllylylylylylylylylylyll methylcellulose solution idlala indima ebalulekile ekusetshenzisweni. Isibonelo, uma isetshenziswa ezitsheni, ngenxa yezimpawu ezinciphayo ezinciphile zezisombululo zamanzi, i-viscosity yekhambi iyancipha ngokwanda kwezinga le-shear, futhi libuye likhuphule uketshezi lwe-coating . Umphumela ukhulu kakhulu; Ngenkathi usuphumule, i-viscosity yekhambi likhulu, elivimbela ngempumelelo ukubekwa kwezinhlayiya ze-pigment ku-coating.
02
Indlela yokuhlola ye-HPMC yokuhlola
Inkomba ebalulekile yokulinganisa umphumela wokuqina we-hydroxypropylllylylylylylyllose methylcellulose kungukubonakaliswa okusobala kwesisombululo esinamanzi. Izindlela zokulinganisa zokubonakala okusobala zivame ukufaka indlela ye-capillary viscosity, indlela yokujikeleza ejikelezayo kanye nendlela yokuwa kwe-viscosity.
Kuphi: Ukubonakala okubonakalayo, i-MPA S; K i-viscometer njalo; d ubuningi besampula yekhambi ku-20/20 ° C; t yisikhathi sesisombululo sokudlula engxenyeni engenhla yesithombe esiya kuMark, s; Isikhathi lapho uwoyela ojwayelekile ugeleza khona esithombeni esilinganiselwe.
Kodwa-ke, indlela yokulinganisa i-capillary visecometer inenkinga enkulu. Ama-viscosities amaningiI-Cellulose AfersKunzima ukuhlaziya ukusebenzisa i-viscometer ye-capillary ngoba lezi zixazululo ziqukethe amanani alandelwayo ezinkundla ze-insoluble ezitholakele kuphela lapho i-capillary vometer ivinjiwe. Ngakho-ke, iningi labakhiqizi lisebenzisa ama-vistereter ajikelezayo ukulawula ikhwalithi ye-hydroxypropylylylylylyllose. Ama-Vistempetor eBrookfield ajwayele ukusetshenziswa emazweni aphesheya, futhi ama-visseters we-NDJ asetshenziswa eChina.
03
Kuthonya izici ze-HPMC viscosity
3.1 ubudlelwano ngezinga lokuhlanganiswa
Lapho amanye amapharamitha ehlala engashintshiwe, ukubonakala kwe-hydroxypropylllylylylyllylyl methylcellose solution kulingana ngezinga le-polymerization (DP) noma ubude be-molecular noma ukunyusa ngokunyuka kwezinga le-polymerization. Lo mphumela ukhulunywa ngokwengeziwe esimweni esiphansi se-polymerization kunecala eliphakeme le-polymerization.
3.2 ubudlelwano phakathi kokubonakala nokuhlushwa
I-ViscoxyprotiyPropRylyl Methylcellose inyuka ngokwanda kokuqoqwa komkhiqizo kusisombululo esinamanzi. Ngisho nokushintshwa kokuhlushwa okuncane kuzodala ushintsho olukhulu ekubonakaleni. Ngokubona okungokwezifiso kwe-hydroxypropyll methylcellosise umphumela wokushintshwa kokuhlushwa kwesixazululo ekubonisweni kwesixazululo kusobala futhi kusobala futhi kusobala.
3.3 Ubudlelwano phakathi kokuvunywa kanye ne-Shear Rate
I-Hydroxypropyllypropyl methylcellulose ikhambi elinamanzi linempahla yokuncipha kwe-shear. I-Hydroxypropyll methylcellulose ye-viscosity ehlukile elungiselelwe isisombululo esingamanzi esingu-2%, futhi ukubonakala kwayo kumanani ahlukene we-shear alinganiswa ngokulandelana. Imiphumela imi kanjena njengoba kukhonjisiwe kwisibalo. Ngezinga eliphansi le-Shear, i-viscoxyprosity methylcellulose solution ayizange iguquke kakhulu. Ngokukhuphuka kwezinga le-Shear, i-viscoxyprosilypropyllylylylylylylylylylylylylylyl methylcellulose ngokusobala okuphezulu kokubonakala kwehle kakhulu, ngenkathi ikhambi elinokubona okuphansi azange linciphe ngokusobala.
3.4 Ubudlelwano phakathi kokuvunywa kanye nokushisa
I-viscoxyproppropyllopyllylylylylylylsylyllose solution ithinteka kakhulu ngamazinga okushisa. Njengoba izinga lokushisa likhuphuka, ukubonakala kwesisombululo kuyancipha. Njengoba kukhonjisiwe esithombeni, ilungiselelwe kwisisombululo esinamanzi nge-2%, kanye nokushintshwa kokuvuleka ngokwanda kwamazinga okushisa kulinganiswa.
3.5 Ezinye izinto ezinethonya
I-viscosity yesisombululo esinamanzi se-hydroxypropyllylylylylylylyl shontwe futhi yizithasiselo kwikhambi, inani le-PH lekhambi, kanye nokuwohloka kwe-microbial. Imvamisa, ukuze uthole ukusebenza okungcono kwe-viscosity noma ukunciphisa izindleko zokusebenzisa, kuyadingeka ukwengeza ama-bheology modifiers, njengobumba, ubumba oluguquliwe, isitayela se-ether, ikhambi elinamanzi we-hydroxypropylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylyl. , nama-electrolyte afana ne-chloride, i-bromide, phosphate, nitrate, njll. Kungangezwa futhi esikhaleni samanzi. Lezi izengezo ngeke zithinte kuphela izici ze-viscosity zesisombululo esinamanzi, kepha zithinta nezinye izakhiwo zohlelo lokusebenza ze-hydroxypropyllylylylylylylylylyllylylyllose njengokugcinwa kwamanzi. , ukumelana kwe-SAG, njll.
I-viscosity yesisombululo esinamanzi se-hydroxypropyllllll icishe ingathinteki nge-acid ne-alkali, futhi ngokuvamile iqinile ohlelweni olungu-3 kuye kwayi-11. Kungamelana nenani elithile lama-asidi abuthakathaka, njenge-formic acid , i-boric acid, i-citric acid, njll. Noma kunjalo, i-acid egxilile izonciphisa i-viscosity. Kepha i-caustic soda, i-potassium hydroxide, amanzi e-lime, njll. Yiba nomthelela omncane kukho. Qhathanisa nezinye izipho ze-cellulose,hydroxypropyl methylcelluloseIsixazululo samanzi sinokuqina okuhle kwe-antimicrobial, isizathu esiyinhloko yithi i-hydroxypropyll methylcellulose enamaqembu aphezulu okufakwa esikhundleni samaqembu kanye nokumiswa kwe-anhydroglucose kuvame ukungafani kalula, okuvinjelwe Ekuhlazeniseni kwama-molecule e-cellulose ether ne-chain scomis. Ukusebenza ukuthi ukubonwa okubonakalayo kwesisombululo esinamanzi kuyancipha. Uma kudingeka ukugcina isisombululo esinamanzi se-hydroxypropyll methylcellulose isikhathi eside, kunconywa ukufaka inani le-trace of antifungal ejenti ukuze i-viscosity ingashintshi kakhulu. Lapho ukhetha ama-anti-fundal agents, ama-proservative noma ama-fungicides, kufanele unake ukuphepha, bese ukhetha imikhiqizo engabi kakhulu emzimbeni womuntu, inezinto ezizinzile futhi zingamakhandlela ama-dow cher, ama-bacterium amagciwane neminye imikhiqizo. ungadlala indima ehambisanayo.
Isikhathi Seposi: APR-28-2024