HPMC (Hydroxypropyl Methylcellulose) bụ ngwakọta polymer na-agbaze mmiri nke enwetara site na mgbanwe kemịkalụ nke cellulose eke. A na-eji ya eme ihe n'ọtụtụ ebe n'ọhịa nke agba na mkpuchi n'ihi ịdị mma ya, nkwụsi ike, na njide mmiri. HPMC nwere ike imeziwanye rheology, nkwụsi ike, na ịrụ ọrụ nke mkpuchi ahụ, hụ na mkpuchi ahụ nwere arụmọrụ kwụsiri ike n'oge nchekwa, njem na ihe owuwu, yana nweta ihe nkiri mkpuchi otu.
(1) Ihe ndị bụ isi nke HPMC
HPMC bụ ether cellulose na-abụghị ionic nwere njirimara ndị a:
Mmetụta dị nro: HPMC nwere ike ịmepụta ngwọta viscous na mmiri na ihe ndị na-edozi ahụ, nke nwere ike ịbawanye viscosity nke mkpuchi n'ụzọ dị irè, si otú ahụ na-abawanye arụmọrụ mkpuchi mkpuchi na mkpuchi mkpuchi.
Mmetụta njide mmiri: HPMC nwere ikike njigide mmiri dị mma ma nwee ike igbochi ikuku ngwa ngwa nke mmiri na mkpuchi. Ọ kachasị mma maka mkpuchi mmiri nke dị mkpa ka a na-etinye ya na ebe akọrọ.
Ihe na-emepụta ihe nkiri: HPMC, dị ka ihe enyemaka na-emepụta ihe nkiri, nwere ike inyere mkpuchi ahụ aka ịmepụta ihe nkiri na-egbuke egbuke na nke edo edo n'oge usoro ihicha, na-eme ka ọdịdị ahụ dịkwuo mma na nkwụsị nke ihe nkiri mkpuchi.
Ndakọrịta: HPMC nwere ezigbo nkwụsi ike kemịkalụ yana ndakọrịta na ụdị ihe nrụpụta dị iche iche, ọ dabara adaba maka ụdị mkpuchi mkpuchi dị iche iche.
(2) Isi ọrụ nke HPMC na agba na mkpuchi
1. Ọkpụkpụ
Na agba na mkpuchi mkpuchi, HPMC, dị ka otu n'ime isi ihe na-eme ka ọ dị elu, na-enyere aka ịhazigharị rheology (ie, fluidity na deformability) nke mkpuchi site n'ịgbanwe viscosity ya. Ngwongwo rheological dị mma nwere ike igbochi mkpuchi na-edozi n'oge nchekwa ma nọgide na-arụ ọrụ mmiri na mkpuchi kwesịrị ekwesị n'oge a na-ewu ụlọ.
Mmetụta dị nro nwere mmetụta dị iche iche na ụdị mkpuchi dị iche iche. Na mkpuchi mmiri, HPMC na-abawanye viscosity nke mkpuchi ahụ, na-eme ka ọ dịkwuo mfe itinye ma kesaa ya n'elu, na-ezere sagging. N'ihe mkpuchi ihe mgbaze, HPMC na-enyekwa aka dozie viscosity ma na-enye thixotropy kwesịrị ekwesị (nkpuchi ahụ na-agbaze mgbe ọ na-ahapụ ya ka ọ kwụ ọtọ ma dị mkpa mgbe a na-akpali ya ma ọ bụ tinye ya).
2. Onye na-ejigide mmiri
Mmetụta na-ejigide mmiri nke HPMC dị mkpa karịsịa, karịsịa na agba ndị dabeere na mmiri. Ọ nwere ike igbochi mmiri dị na agba nke ọma ngwa ngwa n'oge usoro ihe owuwu ahụ, si otú ahụ hụ na mkpuchi ahụ nwere oge zuru ezu iji mee ka ọ dị elu ma mepụta ihe nkiri mkpuchi dị nro na nke edo. N'okpuru akọrọ ma ọ bụ ọnọdụ okpomọkụ dị elu, ikuku nke mmiri na agba ngwa ngwa nwere ike ime ka ọkpụkpụ nke ihe nkiri mkpuchi ma ọ bụ elu na-adịghị mma. HPMC nwere ike belata usoro a nke ukwuu.
HPMC nwekwara ike inyere ndị pigmenti na fillers na agba na-anọgide evenly agbasasị n'oge a na-ewu usoro, na-egbochi obodo ihicha ma ọ bụ urughuru agglomeration, si otú huu mma na uniformity nke mkpuchi ihe nkiri.
3. Onye na-enye ọkwa ọkwa na mmetụta mgbochi sagging
Dị ka onye na-ahụ maka ọkwa ọkwa, HPMC nwere ike igbochi agba ka ọ ghara ịdaba ma ọ bụ sag n'oge usoro ihicha nke agba. N'ihi njirimara rheological ya pụrụ iche, HPMC nwere ike inye ezigbo mmiri mmiri n'oge a na-ewu mkpuchi, na-ekwe ka agba na-agbasa n'elu ala. Mgbe ịkwụsị ọrụ ahụ, viscosity nke agba na-eji nwayọọ nwayọọ na-agbake iji gbochie oke mmiri na ịmepụta akara sagging.
Njirimara a dị oke egwu na eserese facade ma ọ bụ oge ndị ọzọ ebe achọrọ ngwa kwụ ọtọ. Mgbakwunye nke HPMC na-eme ka agba ahụ na-enweta ngwa ngwa nke ọma na-ejikọta ya mgbe etinyere ya, nke mere na ọ na-anọ n'elu ebe a na-etinye ya na ya, na ọ dịghị agbadata ala n'ihi ike ndọda.
4. Mmetụta na-ekesa
HPMC, dị ka a dispersant, nwere ike melite dispersibility nke pigmenti na fillers na agba. Site na imeziwanye dispersibility nke pigmenti na fillers, HPMC nwere ike hụ na ihe ndị siri ike na agba na-anọgide na-agbasasị nke ọma, zere agglomeration na sedimentation, ma si otú ahụ melite uniformity na nkwụsi ike nke mkpuchi. Nke a dị mkpa maka agba agba agba na ihe eji arụ ọrụ nke mkpuchi.
5. Enyemaka ihe nkiri
N'oge a na-emepụta ihe nkiri nke agba, HPMC nwekwara ike iji dị ka ihe enyemaka na-emepụta ihe nkiri na-enyere aka ịmepụta mkpuchi otu. Njirimara a dị oke mkpa iji melite ogo elu nke mkpuchi. N'oge usoro ihicha, HPMC na-agba mbọ hụ na agba nwere ike ịkpọ nkụ n'elu na n'ime ya site n'ịgbanwe oke ikuku nke mmiri, na-eme mkpuchi dị larịị ma dị mma. Karịsịa na agba na-egbuke egbuke na ihe eji achọ mma, ọrụ HPMC na-eme ka mkpuchi ahụ nwee ọdịdị dị mma.
(3) Uru nke iji HPMC
1. Meziwanye arụmọrụ ihe owuwu nke mkpuchi
Mmetụta ụkpụrụ rheological nke HPMC na-eme ka mkpuchi ahụ dị mfe ịrụ ọrụ n'oge ngwa, na arụ ọrụ ihe owuwu na-emewanyewanye nke ọma. Ihe mkpuchi ahụ agaghị agabiga ókè ma ọ bụ mepụta akara nchara, ihe mkpuchi ahụ na-adịwanye n'otu, na ihe nkiri mkpuchi a na-emepụta mgbe e wuchara ya dị nro ma dị nro.
2. Meziwanye nkwụsi ike nchekwa nke mkpuchi
HPMC nwere ike igbochi stratification na sedimentation nke mkpuchi n'oge nchekwa, na-ejigide otu na nkwụsi ike nke mkpuchi. Mmetụta ya na-eme ka ọ sie ike ma na-agbasasị nwere ike idobe pigmenti na ihe ndị na-emepụta ihe na mkpuchi ahụ n'otu ebe na-agbasasị agbasa, na-agbatị ndụ nchekwa nke mkpuchi ahụ.
3. Meziwanye arụmọrụ mgbochi nke ihe nkiri mkpuchi
Mmetụta njide mmiri nke HPMC na-eme ka mmiri dị na mkpuchi nwere ike jiri nwayọọ nwayọọ wepụ ya n'oge usoro ihicha, na ihe nkiri mkpuchi ahụ agaghị agbawa n'ihi ihicha ngwa ngwa mgbe e guzobere ya, si otú ahụ na-eme ka ọdịdị zuru oke na ịdịte aka nke ihe nkiri mkpuchi.
4. Nkwekọrịta na ọnọdụ gburugburu ebe obibi dị iche iche
Ebe ọ bụ na HPMC nwere ike mgbanwe mgbanwe na okpomọkụ na iru mmiri, ọ bụ adabara mkpuchi ewu n'okpuru dị iche iche gburugburu ebe obibi ọnọdụ, karịsịa na elu okpomọkụ na ala iru mmiri gburugburu. HPMC nwere ike melite njigide mmiri nke mkpuchi nke ọma ma gbochie mkpuchi ahụ ka ọ ghara ihicha ngwa ngwa.
(4) Ngwa nke HPMC na ụdị mkpuchi dị iche iche
Ihe mkpuchi mmiri: A na-ejikarị HPMC eme ihe maka ịgbatị, njide mmiri na nhazi ọkwa na mkpuchi mmiri. Ọ nwere ike imeziwanye arụmọrụ ihe owuwu nke mkpuchi mmiri, karịsịa mgbe a na-eji ya na gburugburu ebe a na-ehicha ngwa ngwa, ọ nwere ike ime ka ikike nchekwa mmiri dịkwuo mma.
Ihe mkpuchi ihe owuwu: Na mkpuchi ụlọ, HPMC na-ahụ maka nchekwa ogologo oge nke mgbidi ma ọ bụ elu ụlọ site n'ịkwalite nguzogide mgbape na ịdịte aka nke mkpuchi ahụ. Ihe mkpuchi ihe owuwu na-achọkarị ịrụ ọrụ ihe owuwu dị elu na nguzogide ihu igwe, yana HPMC nwere ike inye aka melite akụrụngwa ndị a.
Ihe mkpuchi na-egbuke egbuke: Ihe mkpuchi na-egbuke egbuke nwere ihe ndị dị elu chọrọ maka elu elu na ire ụtọ. Mmetụta dị larịị na ihe na-emepụta ihe nkiri nke HPMC nwere ike imeziwanye ọdịdị ọdịdị nke mkpuchi ahụ, na-eme ka ọ na-egbuke egbuke ma dị nro.
HPMC na-arụ ọtụtụ ọrụ na agba na mkpuchi, gụnyere ịgba, njide mmiri, nhazi ọkwa, mgbasa na nhazi ihe nkiri. Ọ bụghị naanị na ọ ga-eme ka arụmọrụ arụ ọrụ nke mkpuchi ahụ dịkwuo mma, kamakwa imeziwanye àgwà na ịdịte aka nke ihe nkiri mkpuchi. Ya mere, a na-ejikarị HPMC eme ihe n'ụdị mkpuchi nke oge a ma bụrụ ihe mgbakwunye dị mkpa iji hụ na arụmọrụ na ịdị mma nke mkpuchi.
Oge nzipu: Ọktoba 11-2024