1.Hydroxypropyl methyl cellulose
Hydroxypropyl methylcellulosehe momo cellulose kei te tere haere te whakaputa me te kai. He katote-kore-kore-a-roto i konatunatua te etera mai i te miro parakore i muri i te whakamaaramatanga, ma te whakamahi i te propylene oxide me te methyl chloride hei kaihoko etherification, na roto i te raupapa tauhohenga. Ko te tohu o te whakakapinga ko te tikanga 1.2~2.0. He rereke ona ahuatanga i runga i te ōwehenga o te ihirangi methoxyl ki te ihirangi hydroxypropyl.
(1) He ngawari te wairewa Hydroxypropyl methylcellulose i roto i te wai matao, a ka raru ki te rewa i te wai wera. Engari he tino teitei ake te pāmahana o te wai wera i tera o te methyl cellulose. Ko te memehatanga i roto i te wai matao ka tino pai ake ki te methyl cellulose.
(2) (2) Ko te viscosity o te hydroxypropyl methylcellulose e pa ana ki tona taumaha ngota, me te nui o te taumaha ngota, te teitei ake o te viscosity. Ka pa ano te pamahana ki tona pokey, i te pikinga o te pāmahana, ka heke te pokey. Heoi, he iti ake te awe o tona pokey teitei me te pāmahana i to te methyl cellulose. He pūmau tana otinga ina penapena ki te pāmahana rūma.
(3) Ko te pupuri i te wai o te hydroxypropyl methylcellulose e whakawhirinaki ana ki te nui o te taapiri, te pokey, me etahi atu, a ko te reiti pupuri wai i raro i te nui o te taapiri he nui ake i tera o te methyl cellulose.
(4) Ko te Hydroxypropyl methylcellulose he pumau ki te waikawa me te kawakawa, a he tino pumau tona otinga wai i roto i te awhe o te pH = 2 ~ 12. He iti te paanga o te houra me te wai kotakota ki ana mahi, engari ka taea e te kawakore te tere ake i tona reiti memeha me te whakanui paku i tona pokey. Ko te Hydroxypropyl methylcellulose he pumau ki nga tote noa, engari ka nui te kukū o te wairewa tote, ka piki ake te pokey o te otinga hydroxypropyl methylcellulose.
(5) Hydroxypropyl methylcellulose ka taea te konatunatua ki te wai-wairewa polymers ki te hanga i te otinga rite, teitei-pokey. Pērā i te waipiro polyvinyl, te māngaro ether, te kāpia huawhenua, aha atu.
(6) Ko te Hydroxypropyl methylcellulose he pai ake te aukati i te methylcellulose, a he iti ake te whakaheke o tana otinga e nga enzymes i te methylcellulose.
(7) Ko te whakapiri o te hydroxypropyl methylcellulose ki te hanga kumete he teitei ake i tera o te methylcellulose.
2. Hydroxyethyl cellulose
He mea hanga mai i te miro para parakore kua rongoatia ki te kawakore, ka tauhohe ki te waikura ethylene hei kaihoko whakaetere i te aroaro o te isopropanol. Ko te nuinga o te 1.5~2.0 tona tohu whakakapinga. He kaha te hydrophilicity me te ngawari ki te tango i te makuku.
(1) He wairewa te Hydroxyethyl cellulose ki te wai matao, engari he uaua ki te memeha ki te wai wera. He pūmau tana otinga i te pāmahana teitei kaore he reera. Ka taea te whakamahi mo te wa roa i raro i te wera nui i roto i te kumete, engari he iti ake te pupuri wai i tera o te methyl cellulose.
(2)Hydroxyethyl cellulosehe pūmau ki te waikawa whānui me te kawakawa, ā, ka taea e te kawakore te whakatere i te whakakorenga me te whakanui paku i tona pokey. Ko tona mararatanga i roto i te wai he paku kino atu i tera o te methyl cellulose me te hydroxypropyl methyl cellulose.
(3) Hydroxyethyl cellulose he pai te mahi anti-sag mo te kumete, engari he roa ake te wa whakaroa mo te sima.
(4) Ko te mahi o te hydroxyethyl cellulose i mahia e etahi umanga a-whare he iti ake i tera o te methyl cellulose na te nui o te wai me te nui o te pungarehu.
(5) He tino kino te koriri o te wairewa wai o te hydroxyethyl cellulose. I te mahana o te 40°C, ka puta te koriri i roto i te 3 ki te 5 ra, ka pa ki te mahi.
Te wa tuku: Apr-28-2024