He cellulose te hydroxypropyl methylcellulose me te hydroxyethyl cellulose, he aha te rerekētanga i waenganui i ngā mea e rua?
"Te Rerekētanga i waenganui i te HPMC me te HEC"
01 HPMC me HEC
Ko te Hydroxypropyl methylcellulose (Hypromellose), e mōhiotia ana ko te hypromellose, he momo cellulose kore-ionic i konatunatua ki te ether. He pūmua viscoelastic hanga-kore, kore mahi, e whakamahia whānuitia ana hei hinu whakahinuhinu i roto i te ophthalmology, hei mea tāpiri, hei waka rānei i roto i ngā rongoā ā-waha.
Ko te Hydroxyethyl cellulose (HEC), he matū (C2H6O2)n, he mā, he kōwhai mārama rānei, kāore he kakara, he kore paitini te muka, he paura rānei, he mea hanga mai i te cellulose kawakore me te ethylene oxide (chloroethanol rānei). Ka hangaia mā te etherification, ā, nō roto i te cellulose ethers wairewa kore-ionic. Nā te mea he pai ngā āhuatanga o te HEC ki te whakamātotoru, te whakatārewa, te horapa, te whakaemulsifying, te here, te hanga kiriata, te tiaki i te makuku me te whakarato colloid tiaki, kua whānuitia te whakamahinga i roto i te tūhuratanga hinu, te paninga, te hanga, te rongoā me te kai, te kakahu, te pepa me te polymer Polymerization me ētahi atu mara, 40 mesh te tere tatari ≥ 99%.
02 rerekētanga
Ahakoa he cellulose ngā mea e rua, he maha ngā rerekētanga i waenganui i ngā mea e rua:
He rerekē ngā āhuatanga, ngā whakamahinga, me te wairewa o te Hydroxypropyl methylcellulose me te hydroxyethylcellulose.
1. Ngā Āhuatanga Rerekē
Ko te Hydroxypropyl methylcellulose: (HPMC) he muka ma, he paura kirikiri rānei, nō roto i ngā momo ethers whakaranu cellulose kore-ionic. He polymer viscoelastic kore-ora haurua-hangai.
Ko te Hydroxyethylcellulose (HEC) he muka, he paura rānei he mā, he kōwhai rānei, kāore he kakara, kāore hoki he paitini. Ka whakaeterehia mā te cellulose kawakore me te ethylene oxide (te chlorohydrin rānei). Nō te cellulose ether wairewa kore-ionic.
2. Te wairewatanga rerekē
Hydroxypropyl methylcellulose: tata kore e wairewa i roto i te etanoru tino, te etera me te acetone. He wairewa koloid mārama, he wairewa paku kapua rānei kua wairewahia ki te wai matao.
Hydroxyethyl cellulose: Kei a ia ngā āhuatanga o te whakamātotoru, te whakatārewatanga, te here, te whakaemulsifying, te horapa me te whakamakuku. Ka taea e ia te whakarite i ngā otinga i roto i ngā awhe matotoru rerekē, ā, he tino pai te wairewa tote mō ngā electrolytes.
Kei te Hydroxypropyl methylcellulose ngā āhuatanga o te kaha ki te whakamātotoru, te ātete iti ki te tote, te pumau pH, te pupuri wai, te pumau āhua, ngā āhuatanga hanga kiriata pai rawa atu, te ātete whānui ki ngā whākōkī, te marara me te piripono.
He maha ngā rerekētanga i waenganui i ngā mea e rua, ā, he rerekē anō hoki tō rāua whai huatanga i roto i te umanga.
Ko te Hydroxypropyl methylcellulose te nuinga o te wā e whakamahia ana hei whakamātotoru, hei whakamarara me hei whakaū i roto i te umanga paninga, ā, he pai te wairewatanga ki te wai, ki ngā whakarewa waro rānei. I roto i te umanga hanga, ka taea te whakamahi ki te sima, te gypsum, te putty latex, te plaster, me ētahi atu, hei whakapai ake i te mararatanga o te sima onepu me te whakapai ake i te kirihou me te pupuri wai o te moata.
Kei te Hydroxyethyl cellulose ngā āhuatanga o te whakamātotoru, te whakatārewatanga, te here, te whakaemulsifying, te horapa me te whakamakuku. Ka taea e ia te whakarite i ngā otinga i roto i ngā awhe matotoru rerekē, ā, he tino pai te wairewa tote mō ngā electrolytes. He pai te Hydroxyethyl cellulose hei hanga kiriata, hei whakapūmau, hei whakamātotoru, hei whakaū me te whakawātea i roto i ngā shampoos, ngā rehu makawe, ngā mea whakakore, ngā mea whakangawari me ngā mea whakapaipai; kei roto i ngā paura horoi he momo kaihoko whakahoki paru. Ka tere te rewa o te Hydroxyethyl cellulose i te pāmahana teitei, ka taea te tere ake i te tukanga whakaputa me te whakapai ake i te pai o te whakaputa. Ko te āhuatanga kitea o ngā hopi horoi kei roto ko te hydroxyethyl cellulose ko te whakapai ake i te maeneene me te mercerization o ngā kakahu.
Wā tuku: Hepetema-26-2022