Ngawaphi amabakala ahlukeneyo e-HPMC?

IHydroxypropyl methylcellulose (HPMC) yipolymer esebenza ngeendlela ezininzi esetyenziswa kuluhlu olubanzi lwamashishini kubandakanya amayeza, ulwakhiwo, ukutya, kunye nezinto zokuthambisa. I-derivative cellulose derivative ebonisa uluhlu lweepropati ngokuxhomekeke kwibakala elithile. Amabanga ahlukeneyo e-HPMC ahlukaniswa ngokuyinhloko yi-viscosity yabo, i-degree of substitution, i-particle size, kunye nenjongo ethile yesicelo.

1. IBanga leViscosity
I-Viscosity yiparameter engundoqo echaza ibakala le-HPMC. Ibhekisa kubunzima okanye ukuxhathisa ukuhamba kwesisombululo se-HPMC. I-HPMC inoluhlu lwe-viscosity ukusuka ezantsi ukuya phezulu kwaye idla ngokulinganiswa nge-centipoise (cP) xa inyibilikiswa emanzini. Amanye amabakala e-viscosity aqhelekileyo aquka:

Amanqanaba asezantsi e-viscosity (umzekelo, i-3 ukuya ku-50 cP): La mabanga asetyenziswa kwizicelo ezifuna izisombululo ze-viscosity ephantsi, ezifana neshishini lokutya njengezinzinzi, i-thickeners, okanye i-emulsifiers.

Amabanga aphakathi e-viscosity (umzekelo, i-100 ukuya ku-4000 cP): I-HPMC ye-viscosity ephakathi isetyenziselwa ukukhutshwa okulawulwayo kwimixube yamachiza kunye nezibophelelo kwimveliso yethebhulethi.

Amanqanaba aphezulu e-viscosity (umzekelo, i-10,000 ukuya kwi-100,000 cP): Amanqanaba aphezulu e-viscosity ahlala esetyenziswa ekwakheni, ngokukodwa udaka olusekelwe kwisamente, i-adhesives, kunye ne-plasters, apho ziphucula ukusebenza, ukugcinwa kwamanzi kunye nokunamathela.

2. iDegree of Substitution (DS) kunye neMolar Substitution (MS)
Iqondo lokutshintshwa libhekisela kumyinge wenani lamaqela e-hydroxyl kwi-molecule ye-cellulose ethatyathelwa indawo yi-methoxy (-OCH3) okanye i-hydroxypropyl (-OCH2CHOHCH3) amaqela. Iqondo lokutshintsha lichaphazela ukunyibilika, ubushushu be-gelation, kunye ne-viscosity ye-HPMC. Amabanga e-HPMC ahlelwa ngokusekwe kumxholo we-methoxy kunye ne-hydroxypropyl:

Umxholo we-Methoxy (28-30%): Umxholo ophezulu we-methoxy ukhokelela ngokubanzi kubushushu obuphantsi be-gelation kunye ne-viscosities ephezulu.

Umxholo we-Hydroxypropyl (7-12%): Ukwandisa umxholo we-hydroxypropyl ngokubanzi kuphucula ukunyibilika kwamanzi abandayo kwaye kwandisa ukuguquguquka.

3. Ukuhanjiswa kobungakanani besuntswana
Ubungakanani be-particle ye-HPMC powders inokuhluka ngokubanzi, ichaphazela izinga lokuchithwa kunye nokusebenza kwisicelo esithile. I-fineer the particles, ngokukhawuleza iyayichitha, ibenze ifaneleke ngakumbi kwizicelo ezifuna ukuhanjiswa ngokukhawuleza, njengoshishino lokutya. Ekwakhiweni, kungcono ukusebenzisa amabakala anqabileyo ukuze usasazeke ngcono kwimixube eyomileyo.

4. Amanqaku esicelo esithile
I-HPMC ifumaneka kumabanga ahlukeneyo, elungiselelwe iimfuno ezithile zamashishini:

Ibakala lamachiza: Isetyenziswe njenge-binder, ifilimu yangaphambili, kunye ne-arhente yokukhululwa elawulwayo kwiifom zedosi yomlomo eqinile. Ihlangabezana nemigangatho engqongqo yokucoceka kwaye ngokuqhelekileyo ine-viscosity ethile kunye neempawu zokutshintsha.

Ibakala lokwakha: Eli bakala le-HPMC lenzelwe ukusetyenziswa kwisamente kunye neemveliso ezisekwe kwigypsum. Iphucula ukugcinwa kwamanzi, ukusebenza kakuhle, kunye nokuncamathela kwi-plasters, ii-mortars, kunye ne-tile adhesives. Amanqanaba aphezulu e-viscosity asetyenziswa kule ndawo.

Ibakala lokutya: Ibakala lokutya i-HPMC ivunyiwe ukuba isetyenziswe njengesongezo sokutya (E464) kwaye ingasetyenziswa njenge-thickener, i-emulsifier, kunye ne-stabilizer kwiimveliso ezahlukeneyo, kubandakanya iimpahla ezibhakiweyo kunye neendawo zobisi. Kufuneka ihambelane nemimiselo yokhuseleko lokutya kwaye iqhelekile ekungcoleni.

Ibakala le-Cosmetic: Kwiimveliso zokhathalelo lomntu, i-HPMC isetyenziswa njenge-thickener, emulsifier, kunye nefilimu yangaphambili. Inika ukuthungwa okugudileyo kwiikhrimu, iiloshini, kunye neshampu.

5. Amanqaku alungisiweyo
Ezinye izicelo zifuna amanqanaba e-HPMC alungisiweyo, apho ipholima iguqulwe ngokwekhemikhali ukuze kuphuculwe iipropathi ezithile:

I-HPMC edibeneyo yoMnqamlezo: Olu hlengahlengiso luphucula amandla ejeli kunye nokuzinza kwimiqulu elawulwayo yokukhutshwa.

IHydrophobic modified HPMC: Olu hlobo lwe-HPMC lusetyenziswa ekuxutyweni olufuna ukuxhathisa okuphuculweyo kwamanzi, okufana neetyali kunye neepeyinti.

6. Amanqanaba obushushu beGel
Ubushushu bejeli ye-HPMC bubushushu apho isisombululo siqala ukwenza ijeli. Kuxhomekeke kwinqanaba lokutshintshwa kunye ne-viscosity. Amabanga ahlukeneyo ayafumaneka ngokuxhomekeke kubushushu obufunwayo bejeli:

Amabanga aphantsi obushushu bejeli: La mabanga alungelelanisa ijeli kumaqondo obushushu asezantsi, awenza alungele imozulu eshushu okanye iinkqubo ezithile zoshishino ezifuna useto lobushushu obuphantsi.

Amanqanaba aphezulu obushushu be-gel: Ezi zisetyenziswa kwizicelo ezifuna ukubunjwa kwejeli kumaqondo obushushu aphezulu, njengokuqulunqwa kwamayeza athile.

I-HPMC ifumaneka kumabakala ahlukeneyo ukuhlangabezana neemfuno ezithile zamashishini ahlukeneyo. Ukukhethwa kwebakala le-HPMC kuxhomekeke kwi-viscosity efunwayo, i-degree of substitution, ubungakanani bamasuntswana, kunye neemfuno ezithile zesicelo. Nokuba isetyenziselwa amayeza, ulwakhiwo, ukutya okanye izithambiso, ibakala elichanekileyo le-HPMC libalulekile ekufezekiseni iipropati ezifunwayo kunye nokusebenza kwimveliso yokugqibela.