. Pambuyo pazochitika zingapo, mankhwala a cellulose amachitika. Nthawi zambiri, kuchuluka kwa kuloweza ndi 1.6 ~ 2.0, ndipo mulingo wazolowa m'malo. Ndi ya ether ether ether ether.
1. Methylcellulose imasungunuka m'madzi ozizira, madzi otentha amakumana ndi zovuta, ndipo mabulo amitundu yam'madzi ali okhazikika pakati pa 3/12. Wowuma, Guar Gum ndi zowonjezera zina zambiri ndizogwirizana kwambiri. Miyala imachitika pamene kutentha kumafika kutentha kwa kutentha.
Kusunga kwamadzi kwa methylcellulose kumadalira kuchuluka kwake, mafakisoni, tinthu tating'onoting'ono ndi chiwerengero cha thupi. Nthawi zambiri amakulitsidwa, yaying'ono, yowoneka bwino, kusungidwa kwamadzi kwambiri. Zina mwa izo, kusungidwa kwamadzi kumakhala ndi njira yayikulu kwambiri, ndipo kuchuluka kwa mafayilo sikuphatikizika mwachindunji pamadzi. Chiwerengero chophweka chimatengera kuchuluka kwa mawonekedwe a ma cellulose ndi kukometsa kwa tinthu tambiri. Pakati pa cellulose yomwe ili pamwambapa, methyl cellulose ndi hydroxypropyl meth celyl cellulose imakhala ndi madzi ambiri.
Kusintha kutentha kumatha kukhudza madzi osungira cha methyl cellulose. - Kutentha kwambiri, kukuya madzi osungira. Ngati kutentha kwa matope kupitirira 40 ° C, kusunga madzi a methyl cellulose idzachepetsa kwambiri, kukhudzana ndi kapangidwe ka matope.
Methylcellulose imakhudzanso kugwiritsidwa ntchito ndi kutsatira matope. "Kubereka" Apa kumatanthauza kutsatira pakati pa katswiri wa wogwira ntchito ndi khoma lalikulu, ndiye kuti, kukangana kwa matope. Maonekedwe, mphamvu ya matope, ndipo mphamvu zofunidwa ndi ogwira ntchito ndi ogwira ntchito ndizothandizanso, ndipo zomanga za matondo sizabwino. Methylcellulose okhazikika pamatamiyala mu cellulose ether.
2. Hydroxypropyll methylcellulose (hpmc) [c 6 h 7 o 2) m, oh chter] Ndiwosakhazikika pa celluse yophatikizidwa ndi ether yokonzedwa ndi zochitika zingapo pambuyo pa kupukusa thonje loyengeka ndi alkaliniki, pomwe Promyl Oxide ndi methyl chloride amagwiritsidwa ntchito ngati othandizira. Mulingo wazolowa m'malo mwake 1.2 / 2.0. Zinthu zake zimasiyana malinga ndi kuchuluka kwa methoxyl zomwe zili ndi Hydroxypyl.
1. Hydroxypropyll methylcellulose imagawika mu mtundu wosungunuka ndikulowetsa. Kutentha kwake kumadzi otentha kumakhala kwakukulu kuposa kwa methylcellulose. Zimawonetsanso kusintha kwakukulu kwa methylcellulose pomwe kusungunuka m'madzi ozizira.
Makutu a hydroxypropyll methylcellulose akukhudzana ndi kunenepa, ndipo kunenepa kwambiri. Kutentha kumakhudzanso mamasukidwe awo, pamene kutentha kumakulirakulira, ma virucy amachepetsa. Komabe, kutenthedwa kwa kutentha pa ufa kutsika kuposa kwa methyl cellulose. Njira yothetsera vutoli limasungidwa kutentha.
3. Kusunga kwamadzi kwa hydroxpyupyl kumatengera kuchuluka kwake, mamasukidwe, ndi zina zambiri.
4. Hydroxypropyll Methylcellulose ndi yokhazikika kwa asidi ndi alkali, ndipo njira yake yothetsera matenda imakhala yokhazikika mu pH ya PH of 2/12. Kugwiritsa ntchito kosungunuka koloko ndi mandimu ndi laimu kulibe mphamvu zambiri, koma alkali amatha kusamalira kuchuluka kwake, ndipo mafanowo amawonjezeka. Hydroxypropyll methyllulose ndi yokhazikika pamchere wambiri, koma pamene kuchuluka kwa mcherewu ndi wokwera, mamasukidwe a hydroxypropyll so methylcellulose yankho limakonda kukula.
Hydroxypropyl imatha kusakanikirana ndi ma poity osungunuka madzi kuti apange yunifolomu, mafayilo apamwamba kwambiri. Monga mowa wa mulyvinyl, madzi owuma, masamba chingamu, etc.
Hydroxypypyll methylcelulose ali ndi enzyme yolimba kuposa methylcelulose yotsika mtengo, ndipo chotsatira cha hydroxyclulose chilengedwe chonsecho ndi chachikulu kuposa cha methylcellulose. chipinda chapamwamba.
Atatu, hydroxethyl cellulose (hec) amapangidwa kuchokera ku thonje loyeretsedwa ndi alkali, pamaso pa acetone, ndi ethylene oxide ngati wothandizira. Mulingo wake wolowa m'malo mwake 1.5 / 2.0. Ili ndi hydrophilicity wamphamvu ndipo ndizosavuta kuyamwa chinyezi.
1. Hydroxyethyl cellose ndi kusungunuka m'madzi ozizira, koma zimakhala zovuta kusungunuka m'madzi otentha. Njira yothetsera vutoli ndi yokhazikika pa kutentha kwambiri ndipo ilibe malo a gel. Itha kugwiritsidwa ntchito kwanthawi yayitali matope kwambiri, koma madzi ake osungidwa ndi otsika kuposa a methyl cellulose.
2. Hydroxyethyl cellulose ndi khola kwa onse ndi alkali. Alkali amathandizira kusungunuka kwake, ndipo mawonekedwe ake amawonjezeka pang'ono. Kubalalika kwamadzi kumakulitsa pang'ono kuposa kwa methyl cellulose ndi hydroxypropyl pa cellulose.
3. Hydroxethyl Cellulose ali ndi matope abwino otsutsa matope, koma kwa nthawi yayitali, ena omwe amapangidwa ndi ma hydroxethyl amagwiritsa ntchito cellulose chifukwa cha madzi akuluakulu ndi phulusa lalitali.
4. Carboxymethyl cellulose (cmc) \ [C6h7o2 (O) 2och2coaone) (thonje) Mlingo wazolowa m'malo mwake nthawi zambiri umakhala 0,4 / 1.4, ndipo kuchuluka kwa zolowa kumakhudza kwambiri magwiridwe antchito.
Carboxymethyl cellulose imakhala ndi hygrosopicity, ndipo malo osungira ambiri amakhala ndi madzi ambiri.
2. Carboxymethyl cellulose yankho silimatha kupanga gel, ma virucked amachepetsa kutentha pomwe matenthedwe akutuluka, ndipo ma viruyo ali osasinthika pomwe matenthedwe amapitilira 50 ° C.
Kukhazikika kwake kumakhudzidwa kwambiri ndi PH. Nthawi zambiri amagwiritsa ntchito matope a gyplum, osati matope a simenti. Pankhani ya kubereka kwambiri, imataya mafayilo awo.
Kusungidwa kwake kwamadzi kumakhala kotsika kwambiri kuposa kwa methyl cellulose. Matope a gypsum ali ndi zobwezera, kuchepetsa mphamvu. Koma mtengo wa carboxymethyl cellulose ndiwotsika kwambiri kuposa wa methyl cellulose.
Post Nthawi: Feb-14-2025