Hydroxypropyl methylcellulose (HPMC) bụ mmiri-soluble nke na-abụghị ionic cellulose ether nke a na-ejikarị eme ihe ụlọ, ọgwụ, nri, ngwaahịa nlekọta onwe onye na mkpuchi. Na mkpuchi ụlọ ọrụ na agba, HPMC aghọwo ihe mgbakwunye dị mkpa n'ihi njirimara anụ ahụ na kemịkal pụrụ iche. Isi ọrụ ya bụ ije ozi dị ka onye na-agba agba, stabilizer, onye na-emepụta ihe nkiri na onye na-ahụ maka njikwa rheology iji meziwanye arụmọrụ, nkwụsi ike nchekwa na mkpuchi mkpuchi nke mkpuchi na agba.
1. Basic e ji mara HPMC
HPMC bụ ngwakọta enwetara site na-agbanwe cellulose eke ekemịkal. Ọ nwere ihe ndị a dị ịrịba ama nke anụ ahụ na kemịkalụ, na-eme ka a na-ejikarị ya na mkpuchi ụlọ ọrụ na agba:
Mmiri solubility: HPMC nwere ezigbo solubility na mmiri oyi, na-emepụta ngwọta viscous transperent nke na-enyere aka melite viscosity nke agba.
Thermal gelability: N'otu ọnọdụ okpomọkụ, HPMC ga-etolite gel ma laghachi na ọnọdụ ngwọta mgbe ọ jụrụ. Njirimara a na-enye ya ohere ịnye arụmọrụ mkpuchi ka mma n'okpuru ọnọdụ ihe owuwu a kapịrị ọnụ.
Ihe ndị na-emepụta ihe nkiri dị mma: HPMC nwere ike ịmepụta ihe nkiri na-aga n'ihu mgbe agba na-akpọnwụ, na-eme ka adhesion na ịdịte aka nke mkpuchi.
Nkwụsi ike: O nwere nnukwu iguzogide acid, bases na electrolytes, na-eme ka nkwụsi ike nke mkpuchi n'okpuru ọnọdụ nchekwa dị iche iche na ojiji.
2. Isi ọrụ nke HPMC na mkpuchi ụlọ ọrụ na agba
2.1 Ọkpụkpụ
N'ime mkpuchi ụlọ ọrụ, mmetụta na-abawanye nke HPMC dị mkpa karịsịa. Ngwọta ya nwere nnukwu viscosity na ezigbo shear thinning Njirimara, ya bụ, n'oge a na-akpali akpali ma ọ bụ eserese, viscosity ga-ebelata nwa oge, si otú ahụ na-eme ka owuwu nke agba, na viscosity ga-agbake ngwa ngwa mgbe a kwụsịrị ihe owuwu ahụ iji gbochie agba. site na sagging. Ihe onwunwe a na-eme ka o doo anya ọbụna ngwa mkpuchi ma belata sagging.
2.2 Rheology njikwa
HPMC nwere mmetụta dị ịrịba ama na rheology nke mkpuchi. Ọ na-ejigide viscosity kwesịrị ekwesị nke mkpuchi n'oge nchekwa ma na-egbochi mkpuchi site na deaminating ma ọ bụ dozie. N'oge ngwa, HPMC na-enye ihe nrịbama kwesịrị ekwesị iji nyere aka na-ekesa agba ya n'elu ngwa ngwa wee mepụta mkpuchi dị nro. Tụkwasị na nke ahụ, ihe ndị na-eme ka ọkpụkpụ ya dị nro nwere ike ibelata akara nchara ma ọ bụ akara mpịakọta emepụtara n'oge usoro ngwa ma melite ọdịdị ọdịdị nke ihe nkiri mkpuchi ikpeazụ.
2.3 onye na-emepụta ihe nkiri
Ihe na-emepụta ihe nkiri nke HPMC na-enyere aka melite nrapado na ike ihe nkiri nke mkpuchi. N'oge usoro ihicha, ihe nkiri ahụ nke HPMC hibere nwere ịdị mma na ịdị nro, nke nwere ike ime ka mgbape mgbape na-eyi mkpuchi mkpuchi, karịsịa na ụfọdụ ngwa mkpuchi ụlọ ọrụ dị elu, dị ka ụgbọ mmiri, ụgbọ ala, wdg, HPMC The Ihe ndị na-emepụta ihe nkiri nwere ike imeziwanye ịdịte aka nke mkpuchi ahụ nke ọma.
2.4 Stabilizer
Dị ka a stabilizer, HPMC nwere ike igbochi ọdịda nke pigmenti, fillers na ndị ọzọ siri ike ahụ na mkpuchi formulations, si otú melite nchekwa kwụsie ike nke coatings. Nke a dị mkpa karịsịa maka mkpuchi mmiri. HPMC nwere ike igbochi delamination ma ọ bụ agglomeration nke mkpuchi n'oge nchekwa ma hụ na ngwaahịa na-agbanwe agbanwe n'ime ogologo oge nchekwa.
3. Ngwa nke HPMC na mkpuchi dị iche iche
3.1 Ihe mkpuchi mmiri
Ihe mkpuchi nke mmiri na-enweta nlebara anya dị ukwuu n'afọ ndị na-adịbeghị anya n'ihi ịdị mma gburugburu ebe obibi ha na ihe ọkụkụ na-adịghị ala ala (VOC). A na-ejikarị HPMC eme ihe na mkpuchi mmiri. Dị ka a thickener na stabilizer, HPMC nwere ike n'ụzọ dị irè melite nchekwa kwụsie ike na workability nke mmiri dabeere mkpuchi. Ọ na-enye njikwa mmiri dị mma na gburugburu ebe dị ala ma ọ bụ dị elu, na-eme ka agba na-adị nro mgbe a na-efesa ya, na-ahịhịa ma ọ bụ tụgharịa.
3.2 Agba Latex
Agba latex bụ otu n'ime ihe mkpuchi ụlọ a na-ejikarị eme ihe taa. A na-eji HPMC eme ihe dị ka onye na-ahụ maka rheology na onye na-agbapụta agba na agba latex, nke nwere ike gbanwee viscosity nke agba latex, kwalite mgbasa ya, ma gbochie ihe nkiri agba ka ọ ghara ịdaba. Na mgbakwunye, HPMC nwere mmetụta na-achịkwa nke ọma na mgbasa nke agba latex ma na-egbochi ihe ndị ahụ agba ka ọ dozie ma ọ bụ kewaa n'oge nchekwa.
3.3 Agba nke mmanụ
Ọ bụ ezie na ntinye nke mkpuchi mmanụ ebelatala taa na-achọwanye nchebe gburugburu ebe obibi siri ike, a ka na-eji ya eme ihe n'ọtụtụ ebe ụlọ ọrụ mmepụta ihe, dị ka mkpuchi mkpuchi ígwè. HPMC na-arụ ọrụ dị ka onye na-akwụsịtụ na onye na-ahụ maka nchịkwa rheology na mkpuchi mmanụ na-eme ka ọ ghara imezi pigmenti ma nyere mkpuchi ahụ aka inwe ọkwa dị mma na nrapado n'oge ngwa.
4. Otu esi eji na usoro onunu ogwu nke HPMC
Ọnụ ego HPMC eji na mkpuchi na-ekpebikarị ụdị mkpuchi na mkpa ngwa ngwa. N'ikwu okwu n'ozuzu, a na-achịkwa ego mgbakwunye HPMC n'etiti 0.1% na 0.5% nke mkpokọta mkpuchi. Usoro ịgbakwụnye na-abụkarị mgbakwunye ntụ ntụ ntụ kpọmkwem ma ọ bụ ihe akwadoro nke ọma wee gbakwunye ya. Mmetụta ngbanwe solubility na viscosity nke HPMC na-emetụta ọnọdụ okpomọkụ, ogo mmiri na ọnọdụ mkpali. Ya mere, ọ dị mkpa ka a gbanwee usoro eji eme ihe dịka ọnọdụ usoro n'ezie.
Hydroxypropyl methylcellulose (HPMC) na-eji dị ka a thickener, rheology akara gị n'ụlọnga, film-akpụ n'ụlọnga na stabilizer na ulo oru coatings na agba, budata mma ewu arụmọrụ, nchekwa kwụsie ike na ikpeazụ mkpuchi film nke mkpuchi. àgwà. Site n'ịkwalite mkpuchi mkpuchi gburugburu ebe obibi na mmụba ahịa ahịa maka mkpuchi dị elu, HPMC ga-anọgide na-arụ ọrụ dị mkpa na mkpuchi ụlọ ọrụ n'ọdịnihu. Site n'iji ihe ezi uche eme ihe nke HPMC, ihe anụ ahụ na nke kemịkalụ nke mkpuchi nwere ike ime ka ọ dịkwuo mma, a pụkwara ịkwalite ịdịte aka na ihe ịchọ mma nke mkpuchi ahụ.
Oge nzipu: Sep-13-2024