Ka taea e HPMC me CMC te whakakotahi
Ko te Methyl cellulose he ma, he ma ranei penei i te paura kiriuroa, kirikiri ranei;Karekau, karekare.Ko tenei hua i roto i te wai e pupuhi ana ki roto i te otinga colloidal maamaa, paku keru ranei;Kare e rewa i roto i te ewaro tino, chloroform, diethyl ether ranei.Ka tere te marara me te tetere i roto i te wai wera i te 80-90 ℃, ka tere te rewa i muri i te whakamatao.He tino u te wairewa wai i te pāmahana rūma, ka taea te kiri i te pāmahana teitei, ka huri te reera me te otinga me te pāmahana.
He pai te makuku, te whakamararatanga, te piri, te matotoru, te emulsification, te pupuri wai me te hanga kiriata, me te koretake o te hinu.Ko te kiriata he tino pakari, he ngawari me te marama.No te mea he kore-katote, ka taea te hototahi ki etahi atu emulsifiers, engari he ngawari ki te tote ki waho, a he pumau te otinga i roto i te awhe o PH2 — 12. Sodium carboxymethyl cellulose Ko tenei hua ko te tote konutai o te cellulose carboxymethyl ether, no te anionic cellulose ether, he ma, he miraka ranei ma te paura kiriu, matūriki ranei, kiato 0.5-0.7 g/henemita pūtoru, tata kore kakara, kore reka, hygroscopic.He ngawari ki te marara i roto i te wai ki roto i te wairewa gelatinous maramara, e kore e rewa i roto i te waihano me etahi atu whakarewa pararopi.
Ina he 6.5 — 8.5 te pH o te wairewa wai, ka tino heke te pokey o te slurry ina he >10, <5 ranei te pH, ka tino pai ake te mahi ina he 7 te pH. Mo te pumau o te waiariki, ka piki tere te pokey ki raro. 20 ℃, ka tere te huri i te 45 ℃, ka tino heke te denaturation colloid me te viscosity me ngā āhuatanga ina whakamahana mo te wa roa ki runga ake i te 80 ℃.He ngawari te wairewa ki te wai, he otinga marama;He tino pumau i roto i te otinga kawakore, he ngawari ki te whakamaarama i te keehi o te waikawa.Ina 2-3 te uara pH, ka puta te ua, ka puta ano te rerenga i roto i te keehi o nga tote whakarewa maha.Ko te Hydroxypropyl methyl cellulose, e mohiotia ana ano ko te hydroxypropyl methyl cellulose, te cellulose hydroxypropyl methyl ether, ko te kowhiringa o te cellulose miro tino parakore hei rauemi mata, i raro i nga tikanga kawakore na te etherification motuhake me te whakarite.
He wairewa ki te wai me te nuinga o te polar C me te wahanga tika o te waiwaro/wai, propanol/wai, dichloroethane, me etahi atu, kare e rewa i roto i te diethyl ether, acetone, ewaro tino, te pupuhi i roto i te wai matao ki roto i te wairewa colloidal maramara, paku noa ranei.Ko te wairewa wai he mahi mata, he tino marama me te mahi pumau.Kei a HPMC nga taonga o te kiri wera.Whai muri i te whakamahana, ka hangaia e te wairewa wai te wai o te wai o te hua i te rerenga wai, ka rewa i muri i te whakamatao.He rereke te pāmahana reera o nga whakaritenga rereke.
Wā tuku: Sep-09-2022