Ko te MC he methyl cellulose, ka riro mai ma te rongoa i te miro parakore ki te kawakore, ma te whakamahi i te methyl chloride hei kaihoko whakamaarama, me te hanga i te cellulose ether na roto i te raupapa tauhohenga. Ko te tikanga, ko te 1.6~2.0 te tohu whakakapinga, he rereke ano te whakarewatanga me nga nekehanga rereke o te whakakapi. No te etera cellulose kore-katote.
(1) Te pupuri wai omethyl celluloseka whakawhirinaki ki te nui o te taapiri, te pokey, te pai o te matūriki me te tere memeha. Ko te tikanga, mena he nui te taapiri, he iti te pai, he nui te pokey, he nui te reeti pupuri wai. I roto ia ratou, ko te nui o te taapiri he tino awe ki runga i te reiti pupuri wai, a, ko te taumata o te viscosity kaore i te rite ki te taumata o te reeti pupuri wai. Ko te tere o te whakakore i te nuinga ka whakawhirinaki ki te tohu o te whakarereketanga o te mata o nga matūriki cellulose me te pai o nga matūriki. I roto i nga ethers cellulose i runga ake nei, ko te methyl cellulose me te hydroxypropyl methyl cellulose he teitei ake te reiti pupuri wai.
(2) He wairewa te Methylcellulose i roto i te wai matao, engari he uaua ki te memeha i roto i te wai wera, a he tino pumau tona otinga wai i te awhe o te pH=3~12. He pai te hototahitanga ki te māngaro, kapia guar, aha atu, me te maha o nga surfactants. Ka tae atu te pāmahana ki te pāmahana wetewete, ka puta te ahuatanga o te reera.
(3) Ko te huringa o te pāmahana ka tino pa ki te reiti pupuri wai o te methyl cellulose. Ko te tikanga, ka nui ake te pāmahana, ka kino te pupuri wai. Mena ka neke ake te pāmahana moata ki te 40 °C, ka tino kino te pupuri wai o te methyl cellulose, ka tino pa ki te mahi o te moata.
(4) Ko te Methyl cellulose he painga nui ki te mahi me te piri o te moata. Ko te “Adhesion” i konei e tohu ana mo te apitihanga i waenga i te taputapu tono a te kaimahi me te taputapu pakitara, ara, te parenga kutikuti o te moata. He nui te adhesion, he nui te parenga kutikuti o te moata, he nui ano te kaha e hiahiatia ana e nga kaimahi i roto i te tukanga whakamahinga, a, he kino te hanganga o te moata. Ko te piri o te Methylcellulose kei te taumata ngawari i roto i nga hua cellulose ether.
Ko te HPMC he hydroxypropyl methyl cellulose, he cellulose kore-katote i konatunatua etera i hangaia mai i te miro parakore i muri i te maimoatanga kawakore, ma te whakamahi i te propylene oxide me te methyl chloride hei kaihoko whakaetere, me te maha o nga tauhohenga. Ko te tohu whakakapinga he 1.2 ki te 2.0. He rereke nga ahuatanga i runga i te waahanga o te ihirangi methoxyl me te ihirangi hydroxypropyl.
(1) He ngawari te wairewa Hydroxypropyl methylcellulose i roto i te wai matao, engari 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 whakakorenga i roto i te wai matao ka tino pai ake ki te whakataurite ki te methyl cellulose.
(2) Ko te viscosity o te hydroxypropyl methylcellulose e pa ana ki te rahi o tona taumaha ngota, me te nui ake 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. Engari he iti ake te paheketanga o te werawera i te methyl cellulose. Ko tana otinga ka pumau ki te rokiroki i te pāmahana rūma.
(3) 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 runga i ana mahi, engari ka taea e te kawakore te tere ake te rewa me te whakanui ake i te 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.
(4) Te pupuri wai ohydroxypropyl methylcelluloseka whakawhirinaki ki te nui o te taapiri, te pokey, me etahi atu. Ko te reiti pupuri wai i raro i te rahinga taapiri he nui ake i tera o te methyl cellulose.
(5) Hydroxypropyl methylcellulose ka taea te konatunatua ki te wai-wairewa polymer pūhui ki te hanga i te otinga ki te ōrite me te pokey teitei. Pērā i te waipiro polyvinyl, te māngaro ether, te kāpia huawhenua, aha atu.
(6) Ko te piri o te hydroxypropyl methylcellulose ki te hanga kumete he teitei ake i tera o te methylcellulose.
(7) He pai ake te parenga o te Hydroxypropyl methylcellulose ki nga enzymes i te methylcellulose, a he iti ake i te methylcellulose tona otinga.
Te wa tuku: Apr-28-2024