Methylcellulose (MC)
Ko te tauira molecular o te methylcelllose (MC) ko:
[C6h7o2 (oh) 3-h (och3) n \] x
Ko te huringa whakaputa ko te hanga i te eter i te waa o te tauhohenga i muri i te rongoa o te miro kua oti te rongoa me te methyl chloride. Ko te tikanga, ko te tohu o te whakakapinga ko 1.6 ~ 2.0, a he rereke ano te whakarewatanga me nga nekehanga rereke o te whakakapinga. No te kore-katote cellulose.
Ko te methylcellulose he rewa i roto i te wai makariri, a ka uaua ki te rewa i roto i te wai wera. Ko tana otinga wai he tino pumau i roto i te whānuitanga o te ph = 3 ~ 12.
He pai te hototahi ki te māngaro, Guar Gum, me etahi atu me nga tini papaa. Ka tae te pāmahana ki te pāmahana tapatahi, ka puta te tipu.
Ko te pupuri i te wai o Metylcellullose e whakawhirinaki ana ki tana waahanga taapiri, te tirohanga, te utu matūriki me te reiti o te whakakorekore.
Ko te tikanga, mena he nui te rahi o te rahi, he iti te pai, he nui te tirohanga, he tiketike te utu o te wai. I roto ia ratou, ko te nui o te taapiri he paanga nui ki te utu o te reti wai, me te taumata o te tirohanga noa ki te taumata o te reanga pupuri wai. Ko te reanga rewa te nuinga kei te taumata o te whakarereke o te mata o te matūriki cellulose me te pai o te matūriki.
I roto i nga waahanga o te kowhatu i runga ake nei, ko te methyl cellulose me te hydroxypropyl cellulose teitei ake o te reiti pupuri wai.
Carboxymethylcelllose (CMC)
Ko te CarxyMatyl Cellupose, e kiia ana ko te Sodium Carboum, e mohiotia ana ko Celllose, CMC, me etahi atu, he tote te konutai o te Cellobose Carboxylate, a ka whakahoutia. Rauemi mata matū.
Kei te whakamahia te nuinga o te umanga whakaranu, ahumahi kai me nga mara hinu e whakamahi ana i te wai, me te nui i whakamahia i roto i nga kakano noa iho mo te 1%.
Ko te whakamahi i te Ether i te Ether i hangaia mai i nga muka taiao (miro, me etahi atu)
Ko te tohu o te whakakapinga ko te 0.4 ~ 1.4, me ana mahi e tino pa ana ki te tohu o te whakakapinga.
He pai te kaha o te CMC, he pai te aukati i te kaha o te wai, engari kaore he uara kirihou tino kirihou.
Ka rewa te CMC, ka puta ake te depollerization. Ka tiimata te matawai i te wa ka memeha, ka haere i roto i te rahinga, ka heke ki te pereti. Ko te tirohanga hua e pa ana ki te depollemerization.
Ko te tohu o te depollerization e tata ana ki te nui o te whakarewa ngoikore (wai) i roto i te hanganga. I roto i te punaha whakarewa kino, penei i te karaihe kei roto i te glycerin me te wai, kaore e tino heke rawa te cmc ka tae atu ki tetahi waahi taurite.
I roto i te keehi o te kukume wai, ko te nui ake o te hydrophilic e tino whakanui ana i te CMC e ngawari ake ana ki te whakaheke i te CMC iti rawa atu.
Hydroxyetylcelllolose (hec)
Ko Hec te mahi ma te rongoa i te miro me te alkali, a ka mahi ano ki te oxide o te etteylene hei kaihoko mo te Acetone. Ko te tohu o te whakakapinga he 1.5 ~ 2.0. He kaha te hydrophilility ka ngawari ki te ngongo i te makuku.
Ko te celluxyethyl te sellulose he rewa i roto i te wai makariri, engari he uaua ki te rewa i roto i te wai wera. Ko tana otinga he pumau i te nui o te pāmahana me te kore e huri.
He pūmau ki te waikawa me nga turanga. Ka taea e te Alkalis te whakatere i tana horoi me te whakapiki i tana tirohanga. Ko tana raru o te wai he mea kino rawa atu i tera o te cellulose methyl me te hydroxypropyl methyl cellulose.
Hydroxypropyl methyl cellulose (HPMC)
Ko te tauira molecular o te HPMC ko:
\ [C6h7o2 (oh) 3-mn (och3) m, och2ch (oh) ch3 \] n \
Ko te methylceLelose he momo cellulose ko te kaha o te putanga me te kai e tere haere ana.
Ko te cellulose kore-inoc whakaranu i hangaia mai i te miro kua oti te hangai i muri i te whakarewatanga, ma te whakamahi i te apylene me te methyl chloride hei kaihoko kohuko, na roto i te maha o nga tauhohenga. Ko te tohu o te whakakapinga he 1.2 ~ 2.0.
He rereke nga ahuatanga o ona ahuatanga mo nga rereketanga o nga ihirangi methoxyl me nga tuhinga hydroxypropyl.
He ngawari te whakaheke i te wai makariri, engari ka raru te uaua ki te rewa i roto i te wai wera. Engari ko te mea totika i roto i te wai wera he tino tiketike ake i te waa o te cellulose methyl. Ko te whakarewa i te wai makariri ka tino pai ake te whakataurite ki te Cellulose Cellulose.
Ko te tirohanga o te hydroxypropyl methylcellolose e pa ana ki tona taumaha totika, me te nui o te taumaha o te hau, te teitei o te tirohanga. Ka pa ano te pāmahana ki tana tirohanga, ka piki haere te pāmahana, te heke o te manawa. Heoi, ko tona tino tirohanga nui he hua nui o te pāmahana iti ake i te cellulose methyl. Ko tana otinga he pumau ka rongoa i te pāmahana rūma.
Ko te pupuri i te wai o te hydroxypropyl te methylcellusise i runga i te taapiri, me te taapiri, me te utu mo te pupuri i te wai i te taua taapiri kotahi.
Ko te methylcelloulouse he waikawa me te alkali, he pumau tonu te otinga o te ph = 2 ~ 12. Ko te houra kiri me te waiariki he iti te awe o te wai ki ana mahi, engari ka taea e te alkali te tere o te horoi me te whakapiki i tana tirohanga.
Ko te methylceluloul o te hydroxypropyl he pumau ki nga tote noa, engari ka nui te kukume tote tote, ko te tirohanga o te rongoa methylcellulose e ahu atu ana.
Ko te methylcelcropyl methylcellulose ka taea te whakaranu ki nga pūhui-wai-wai-a-wai ki te hanga i tetahi otinga rite tonu me te teitei ake. Pēnei i te waipiro polyvinyl, te māhu hāora, te gum huawhenua, me etahi atu
Ko te methylcellolose he pai ake te tuukino i te methylcelllolose, me tona otinga he iti ake te ngoikore i te methylcelllose
Te wa tuku: Feb-14-2023