Ko te Hydroxypropyl methyl cellulose HPMC he ether cellulose kore-ionic i hangaia mai i te rauemi polymer tūturu cellulose mā te raupapa tukatuka matū. He paura ma, kāore he kakara, kāore he reka, kāore hoki he paitini, ka pupuhi hei wairewa colloidal mārama, paku pōuri rānei i roto i te wai matao. Kei a ia ngā āhuatanga o te whakamātotoru, te here, te marara, te whakaemulsification, te hanganga kiriata, te whakatārewatanga, te mimiti, te whakakī, te mahi mata, te pupuri makuku me te colloid tiaki. Ka taea te whakamahi i te Hydroxypropyl methylcellulose i roto i ngā rauemi hanga, te ahumahi paninga, te kapia hangai, te ahumahi uku, te rongoā, te kai, te kakahu, te ahuwhenua, te ahumahi matū o ia rā me ētahi atu ahumahi.
Te mahi me te kaupapa pupuri wai: Ko te mahi nui a te cellulose ether HPMC ko te pupuri wai me te whakamātotoru i roto i te moata sima me te paru gypsum, ka taea te whakapai ake i te kaha here me te ātete totoro o te paru. Ko ngā āhuatanga pēnei i te pāmahana hau, te pāmahana me te tere o te pēhanga hau ka pā ki te tere mimiti o te wai i roto i te moata sima me ngā hua gypsum. Nō reira, i ngā wā rerekē, he rerekētanga kei roto i te pānga pupuri wai o te nui o ngā hua HPMC. I roto i te hanganga motuhake, ka taea te whakarite i te pānga pupuri wai o te paru mā te whakanui ake, te whakaiti rānei i te nui o te HPMC i tāpirihia.
Ko te pupuri wai o te methyl cellulose ether i raro i ngā āhuatanga pāmahana teitei he tohu nui hei wehewehe i te kounga o te methyl cellulose ether. Ka taea e ngā hua raupapa HPMC pai rawa atu te whakaoti rapanga o te pupuri wai i ngā pāmahana teitei. I ngā wā pāmahana teitei, inā koa i ngā wāhi wera me te maroke me te hanganga paparanga-angiangi i te taha paki, me whakamahi HPMC kounga teitei hei whakapai ake i te pupuri wai o te paru.
He tino pai te ōritetanga o te HPMC kounga teitei. He ōrite te tohatoha o ōna rōpū methoxy me te hydroxypropoxy i roto i te mekameka ngota cellulose, ka taea te whakapai ake i te kaha o ngā ngota hāora i runga i ngā hononga hydroxyl me te ether ki te hono atu ki te wai hei hanga hononga hauwai. , Kia noho ai te wai kore utu hei wai here, kia pai ai te whakahaere i te mimiti o te wai i puta mai i te pāmahana teitei o te rangi, kia tutuki ai te pupuri wai teitei.
Ka taea te whakamarara ōrite me te whai hua i te HPMC cellulose kounga teitei ki roto i te moata sima me ngā hua gypsum, ka takai i ngā matūriki totoka katoa, ka hanga he paparanga kiriata mākū. Ka tukuna mārire te wai i roto i te turanga mō te wā roa. Ka pāngia te rauemi kua whakakōkīhia e te tauhohenga wai, kia mau ai te kaha piri me te kaha pēhi o te rauemi. Nō reira, i roto i te hanganga raumati pāmahana teitei, kia tutuki ai te pānga o te pupuri wai, me tāpirihia ngā hua HPMC kounga teitei ki ngā rahinga e tika ana kia rite ki te tauira, ki te kore, ka puta he kore wai, ka heke te kaha, ka pakaru, ka poka, ka hinga nā te maroke rawa. He raruraru, engari ka whakapiki ake i te uaua o ngā kaimahi hanga. I te hekenga o te pāmahana, ka taea te whakaiti mārire i te nui o te HPMC i tāpirihia, ā, ka taea te whakatutuki i te pānga pupuri wai kotahi.
Ka pāngia te pupuri wai o te HPMC e ngā āhuatanga e whai ake nei:
1. Te ōritetanga o te cellulose ether HPMC
I roto i te HPMC kua tauhohe ōrite, ka tohatoha ōrite ngā rōpū methoxy me te hydroxypropoxy, ā, he teitei te tere pupuri wai.
2. Te pāmahana wera o te cellulose ether HPMC
He tiketike te pāmahana o te tiēre wera, ā, he tiketike te tere pupuri wai; engari, he iti te tere pupuri wai.
3. Te matotoru o te cellulose ether HPMC
Ina piki te matotoru o te HPMC, ka piki anō hoki te tere pupuri wai; ina tae te matotoru ki tētahi taumata, ka noho pūmau te pikinga o te tere pupuri wai.
4. Tāpiritanga o te cellulose ether HPMC
Ka nui ake te nui o te cellulose ether HPMC e tāpirihia ana, ka teitei ake te tere pupuri wai, ā, ka pai ake te pānga pupuri wai. I roto i te awhe o te tāpiri 0.25-0.6%, ka tere ake te piki o te tere pupuri wai me te pikinga o te nui tāpiri; ina piki ake te nui tāpiri, ka puhoi te ia o te pikinga o te tere pupuri wai.
Wā tuku: Hakihea-16-2021