Methylcelsulose (MC)
Ifomula yemolekyula ye-methylcelculose (MC) yile:
[C6h7o2 (oh) 3-h (oc3) n \] x
Inkqubo yemveliso kukwenza i-thesersese i-ethe uthotho lokuphendula emva kokuba i-cotton ye-cotton iphathwa ngeAlkali, kwaye i-methyl chloride isetyenziswa njenge-arhente yophuhliso. Ngokubanzi, inqanaba lokufakwa endaweni le-1.6 ~ 2.0, kwaye i-solinoing nayo yahlukile ngamanqanaba ahlukeneyo okufaka endaweni. Yeyokutshekisha i-enic sete
I-methylcelculose inyibilikiswa emanzini abandayo, kwaye kuya kuba nzima ukunyibilikisa amanzi ashushu. Isisombululo se-ACTEAFOOF sizinzile kakhulu kuluhlu lwe-pH = 3 ~ 12.
Ihambelana ngokuchanekileyo nesitatshi, i-Gum Gum, njl. Njl. Xa iqondo lobushushu lifikelela kubushushu bendawo, ukumela.
Ukugcinwa kwamanzi kwe-methylcelculose kuxhomekeke kwisixa sayo sokudibanisa, ukugcinwa, ukulunga kwemali kunye nenqanaba lokuchitha.
Ngokubanzi, ukuba isixa esongezelelekileyo sikhulu, ukulunga kuncinci, kwaye i-vickosity inkulu, inqanaba lokugcina amanzi liphezulu. Phakathi kwazo, isixa-mali songezelelo sinefuthe elikhulu kwiqondo lokugcina amanzi, kwaye inqanaba le-viscofity alikho ngqo kwinqanaba leqondo lokugcina amanzi. Inqanaba lokuchithwa ikakhulu lixhomekeke kwinqanaba lokutshintsha komphezulu wesuntswana kunye nobumdaka obuchaphazelekayo.
Phakathi kwezi zinto zingentla kwe-Sethes, iMethyl Selelose kunye neHydroxypropyl Methyl Selelose anemilinganiselo ephezulu yokugcina amanzi.
I-carboxeymethylcelose (cmc)
I-Carboxymethyl Selelose, ekwabizwa ngokuba yi-sodium ye-cyboxymethyl sellyulose, iqhelekile njengeselselsese, i-CMC, njl. Izinto ezingafunekiyo zekhemikhali.
Isetyenziswa ikakhulu kwimizi-mveliso yesithintelo, ishishini lokutya kunye ne-oyile ye-oyile yokuqhuba amanzi, kwaye isixa esisetyenzisiweyo kwi-cosmetics kuphela i-1%.
I-Ionic Seleulose Ether yenziwa kwi-fibers yendalo (ikotoni, njl njl.
Inqanaba lokufakwa endaweni yi-0.4 ~ 1.4, kwaye intsebenzo yayo ichaphazeleka kakhulu ngumgangatho wokufaka endaweni.
I-CMC inobuchule obugqwesileyo, kwaye isisombululo se-AITEACH sinokwazi ukumiswa okufanelekileyo, kodwa akukho nto ixabisekileyo yeplastiki.
Xa i-CMC inyibilikisa, i-depolymerization yenzeka. I-viscosity iqala ukuphakama ngexesha lokupheliswa, idlula ngaphezulu, emva koko ihla kwithafa. I-viscosity ebophelelekileyo inxulumene nokungasebenzi.
Inqanaba lokupheliswa kwe-depolymerizazazation inxulumene ngokusondeleyo nenani leSolvent elihlwempuzekileyo (amanzi) ekuqulunqweni. Kwinkqubo yokuyila ecocekileyo, njengezinyo elinamazinyo aqukethe i-glyrin kunye namanzi, i-CMC ayiyi kufikelela ngokupheleleyo ngokupheleleyo kwaye iya kufikelela kwindawo yokulingana.
Kwimeko yoxinzelelo lwamanzi olunikiweyo, i-CMCROphilic ye-hmc ifakwe ngaphakathi kwi-CMC elula kakhulu kwi-depolymerize kune-CMC ephantsi.
HydroxyEthylcelcelce (hec)
I-hec yenziwa ngokunyanga i-cotton ecocekileyo neAlkali, emva koko iphendule nge-Ethylene oxide njengearhente ye-ether. Inqanaba lokufakwa endaweni yi-1.5 ~ 2.0. Inombala oqinileyo kwaye kulula ukuyifumana ukufuma.
I-HydroxyEtheetheetheetheetheetheethy inyibilikisi emanzini abandayo, kodwa kunzima ukunyibilikisa amanzi ashushu. Isisombululo sayo sizinzile kubushushu obuphakamileyo ngaphandle kweGelling.
Inokuzinza kwii-acids eziqhelekileyo kunye neziseko. I-Alkalis inokukhawulezisa ukutshitshiswa kwayo kwaye yonyusa kancinci. Ukusasazeka kwawo ngamanzi kubi kakhulu kune-methyl seluplose kunye ne-hydroxypropyl methyl sethyulose.
Hydroxypropyl methyl seluplose (hpmc)
Ifomula yemolekyuli ye-HPMC yile:
\ [C6H7O2 (O) 3-Mn (OCH2) M, OCH2CH (O) ch3 \] x
I-Hydroxypropyl Methylcelcelcelose yintlobo ngeentlobo zeeselfowuni ezikhutshelwayo kunye nokusetyenziswa kwanda ngokukhawuleza.
Yinto engeyiyo i-ionic ye-ionic ye-iether exutywe ye-ethet ye-cotton ehlaziyiweyo emva kokuqiniseka, usebenzisa i-propylene oxide kunye ne-methyl chloride njengearhente yokuphendula, ngokuphendula. Inqanaba lokufakwa endaweni yi-1.2 ~ 2.0.
Iipropathi zayo zahlukile ngenxa yemilinganiselo eyahlukileyo yemixholo ye-APENGSYL kunye nomxholo we-hydroxypropy.
I-Hydroxypropyl Methylcelcelcelose inyibilika ngokulula emanzini abandayo, kodwa iya kudibana nobunzima ekupheliseni amanzi ashushu. Kodwa iqondo lokuhlaselwa layo lokuhlaselwa kwamanzi ashushu liphezulu kakhulu kune-methyl seluplose. Ukunyibilisela emanzini abandayo kuyaphuculwa kakhulu xa kuthelekiswa neMethyl Selelose.
I-viscosity ye-hydroxypropyl methylcelcelgalose inxulumene nobunzima bayo, kwaye bukhulu ubunzima bomongo, ukuphakama kwe-viscofity. Ubushushu buchaphazela i-viscofity yayo, njengoko amaqondo obushushu ayanda, i-viscosity ihla. Nangona kunjalo, i-viscosity yayo ephezulu inamaqondo obushushu asezantsi kune-methyl seluplose. Isisombululo sayo sizinzile xa sigcinwe kubushushu begumbi.
Ukugcinwa kwamanzi kwi-HydroxyPOpyl Methylcelgalose ixhomekeke kwixabiso lokudibanisa, i-viscofity, njl. Njl., Njl njl., Njl.
I-HydroxyPOpyl Methylcelcelcelose iZinzile kwi-Acid kunye ne-Alkali, kunye nesisombululo se-ALKALU, kunye nesisombululo sayo esizinzileyo kuluhlu lwe-pH = 2 ~ 12. I-Caustic Soda kunye namanzi e-lime anempembelelo encinci ekusebenzeni kwayo, kodwa uAlkali unokukhawulezisa ukupheliswa kwayo kwaye kwandise i-viscofity yayo.
I-HydroxyPOpyl Methylcelcelcelose iZinzile kwi-SECTs eqhelekileyo, kodwa xa uxinzelelo lwesona sityibilili liphezulu, i-viscosity ye-hydroxypropyl methylcelses isisombululo sithanda ukunyuka kwesisombululo.
I-HydroxyPOpyl Methylcelceltulose inokuxutywa kunye ne-polymer ye-polymer ye-prolymer ukwenza iyunifomu kunye nesisombululo se-viscofity ephezulu. Ezinjenge-polyvinyl utywala, i-starch ether, i-gum yemifuno, njl.
I-HydroxyPOpyl Methylcelcelgalose inomsindo ongcono kune-methylceltulose, kwaye isisombululo sayo singaphantsi kune-methylcelsulose
Ixesha leposi: NgoFebwe-14 ukuya ku-2003