Te Rerekētanga i waenga i te HPMC me te HEC

Ko te hydroxypropyl methylcellulose me te hydroxyethyl cellulose he cellulose, he aha te rereketanga o nga mea e rua?

"Te Rerekētanga i waenga i te HPMC me te HEC"

01 HPMC me HEC
Ko te Hydroxypropyl methylcellulose (Hypromellose), e mohiotia ana ko te hypromellose, he ahua o te cellulose kore-ionic i konatunatua ether. He polymer hauhanga, kore hohe, viscoelastic e whakamahia nuitia ana hei whakahinuhinu i roto i nga mahi ophthalmology, hei awhina, hei waka ranei i roto i nga rongoa waha.
Ko te Hydroxyethyl cellulose (HEC), te tauira matū (C2H6O2)n, he ma, he kowhai marama ranei, he kakara, kore-paitini, kiriu, paura totoka, he mea hanga mai i te cellulose kawakore me te ethylene oxide (he chloroethanol ranei) He mea rite ma te whakaeera, no te kore- te katote wairewa cellulose ethers. Na te mea he pai nga ahuatanga o te HEC mo te whakamaroke, te aukati, te whakamarara, te whakaemulsifying, te honohono, te hanga kiriata, te tiaki i te makuku me te whakarato colloid tiaki, kua whakamahia nuitia i roto i te torotoro hinu, te paninga, te hanga, te rongoa me te kai, te kakano, te pepa me te polymer Polymerization. me etahi atu mara, 40 reeti tatari mata ≥ 99%.

02 rerekētanga
Ahakoa he cellulose e rua, he maha nga rereketanga i waenga i nga mea e rua:
He rereke te Hydroxypropyl methylcellulose me te hydroxyethylcellulose ki nga ahuatanga, nga whakamahinga, me te whakarewatanga.

1. Nga ahuatanga rereke
Hydroxypropyl methylcellulose: (HPMC) he muka ma, he rite te ahua ma, he paura kowhatu ranei, no nga momo momo etera whakaurua te cellulose nonionic. He polymer viscoelastic kore-ora.
Ko te Hydroxyethylcellulose: (HEC) he muka ma, he kowhai ranei, he muka korekore, he paura totoka ranei. Ka whakahaehaehia e te cellulose alkaline me te ethylene oxide (te chlorohydrin ranei). No te ether cellulose whakarewa-kore.

2. Rerekē te whakarewatanga
Hydroxypropyl methylcellulose: tata kore e rewa i roto i te ewaro tino, ether me te acetone. Ko te wairewa colloidal maamaa, he paku kapua ranei kua rewa ki te wai matao.
Hydroxyethyl cellulose: Kei a ia nga ahuatanga o te whakapakeke, te whakatarewa, te here, te whakaemulsifying, te whakamarara me te makuku. Ka taea e ia te whakarite otinga i roto i nga awhe pokey rereke, he pai te tote whakarewatanga mo nga electrolytes.
Ko te Hydroxypropyl methylcellulose nga ahuatanga o te kaha ki te whakapakeke, te iti o te tote, te pumau o te pH, te pupuri wai, te ahua o te ahua, te pai o te hanga kiriata, te nui o te aukati i te whaa, te whakamararatanga me te whakakotahitanga.

He maha nga rereketanga i waenga i nga mea e rua, a he rereke ano to raatau whai hua ki te umanga.

Ko te Hydroxypropyl methylcellulose te nuinga o te whakamahi hei whakapakeke, whakamararatanga me te whakapumau i roto i te umanga whakakikorua, he pai te whakarewatanga i roto i te wai, i nga whakarewa pararopi ranei. I roto i te ahumahi hanga, ka taea te whakamahi i roto i te sima, te gypsum, te putty latex, te raima, me etahi atu, hei whakapai ake i te whakamararatanga o te kirikiri ciment me te whakapai ake i te kirihou me te pupuri wai o te kumete.
Kei te Hydroxyethyl cellulose nga ahuatanga o te whakapakeke, o te whakatarewa, o te here, o te whakaemulsifying, o te whakamarara me te whakamakuku. Ka taea e ia te whakarite otinga i roto i nga awhe pokey rereke, he pai te tote whakarewatanga mo nga electrolytes. Ko te Hydroxyethyl cellulose he kiriata whai hua o mua, tackifier, thickener, stabilizer me te dispersant i roto i nga shampoos, rehu makawe, neutralizers, conditioners me nga whakapaipai; i roto i nga paura horoi Kei waenganui ko te ahua o te kaikawe whakaheke paru. Ko te Hydroxyethyl cellulose ka tere te rewa i te wera nui, ka tere ake te mahi whakaputa me te whakapai ake i te pai o te whakaputa. Ko te mea tino kitea o nga kai horoi kei roto i te hydroxyethyl cellulose ka taea te whakapai ake i te maeneene me te mercerization o nga papanga.