1.hydroxypropyl methyl cellulose
Hydroxypropyl methylcelloseHe momo cellulose ko wai 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 i runga i te ōwehenga o te ihirangi methoxyl ki te ihirangi hydroxypropyl.
(1) He ngawari te whakaheke i te wai hydroxypropyl i te wai makariri, a ka tutuki i te raru o 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.
(2) (2) Ko te ahuareka o te hydroxypropyl methylcellolose e pa ana ki tona taumaha totika, me te nui o te taumaha o te konukawata, ko te nui o te tirohanga. Ka pa ano te pāmahana ki tana tirohanga, ka piki haere te pāmahana, te heke o te manawa. Heoi, ko te mana o tona tirohanga nui me te pāmahana he iti iho i tera punaha methyl. Ko tana otinga he pumau ka rongoa i te pāmahana rūma.
(3) Ko te toenga wai o te hydroxypropyl methylcelose e whakawhirinaki ana ki tana waahanga taapiri, me tana utu mo te pupuri i te wai i raro i te taua taapiri.
(4) Ko te methylcelluloulouse he waikawa me te alkali, me te otinga o te waimoana he tino pumau i te whānuitanga o te ph = 2 ~ 12. Ko te houra kiri ka mau te wai kotakota ki ana mahi, engari ka taea e te alkali te tere ake i tana reanga whakakorekore 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.
(5) Ka taea te konatunatu te methylcelulose methylcellolose ki nga polymer wai-rewa ki te hanga i te rongoa tino ataahua, teitei ake. Pēnei i te waipiro polyvinyl, te māhu hāora, te gum huawhenua, me etahi atu
(6) Ko te methylcellulose he pai ake te aukati i te mate enylcellullose, me tona otinga ka whakaitihia e te kohungahunga nui atu i te methyelcelllose.
(7) Ko te taapiri o te hydroxypropyl methylcellulose ki te hanga moata he teitei ake i te methylcelllose.
2.. Tuhinga o mua
He mea hanga mai i te miro whakakikorua me te alkali, a ka tau ki te oxide a etelenene hei kaihoko mo te isopropanol. Ko te tohu o te whakakapinga he 1.5 ~ 2.0. He kaha te hydrophilility ka ngawari ki te ngongo i te makuku.
(1) Ko te cellulox hydroxyethyl 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. Ka taea te whakamahi mo te wa roa i raro i te pāmahana tiketike i roto i te paru, engari he iti ake te pupuri i te wai o te wai.
(2)Cellloxyethyl celluloseHe pumau ki te waikawa whanui me te alkali, a ka taea e te alkali te whakatere 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.
(3) He pai te mahi a te hydroxyethyl mo te paru, engari he wa ano he wa roa mo te raima.
(4) Ko te mahinga o te cellulose hydroxyetyl i hangaia e etahi umanga whare, he iti ake te iti iho i te cellulose methyl na tona nui o te wai me te ihirangi nui.
(5) Ko te koriri o te otinga waiu o te hydroxyethyl cellulise he tino taumaha. I te pāmahana e pā ana ki te 40 ° C, ka puta pea koriri i roto i te 3 ki te 5 nga ra, ka pa ki ana mahi.
Te Wā Whakamutunga: Apr-28-2024