Itandukaniro riri hagati ya HPMC na HEC

Hydroxypropyl methylcellulose na hydroxyethyl cellulose byombi ni cellulose, itandukaniro riri hagati yabyo ni irihe?

"Itandukaniro riri hagati ya HPMC na HEC"

01 HPMC na HEC
Hydroxypropyl methylcellulose (Hypromellose), izwi kandi nka hypromellose, ni ubwoko bwa ether ivanze ya cellulose itari ionic. Ni polymeri ya viscoelastic ikoreshwa mu kwisiga amavuta mu buvuzi bw'amaso, cyangwa nk'umusemburo cyangwa ikinyabutabire mu miti inywa.
Hydroxyethyl cellulose (HEC), formula ya shimi (C2H6O2)n, ni ikintu cy'umweru cyangwa umuhondo woroshye, kitagira impumuro, kidahumanya, gifite fibro cyangwa ifu kigizwe na cellulose alkaline na ethylene oxide (cyangwa chloroethanol). Itegurwa hakoreshejwe etherification kandi ikaba iri mu bintu bita ionic bishongesha cellulose. Kubera ko HEC ifite imiterere myiza yo gukurura, guhagarika, gukwirakwiza, gukurura, guhuza, gukora filime, kurinda ubushuhe no gutanga colloid irinda, yakoreshejwe cyane mu gushakisha amavuta, gusiga, kubaka, imiti n'ibiribwa, imyenda, impapuro na polymer Polymerization n'ahandi, 40 mesh sieving rate ≥ 99%.

02 itandukaniro
Nubwo byombi ari selulose, hari itandukaniro rinini hagati yabyo byombi:
Hydroxypropyl methylcellulose na hydroxyethylcellulose biratandukanye mu miterere, imikoreshereze, no gushonga.

1. Ibiranga bitandukanye
Hydroxypropyl methylcellulose: (HPMC) ni fibre yera cyangwa ifu isa n'iyera cyangwa granular, igizwe n'ibintu bitandukanye bivanze na cellulose bitari ionic. Ni polymer ya viscoelastic idakora neza kandi idafite ubuzima.
Hydroxyethylcellulose: (HEC) ni fibre y'umweru cyangwa umuhondo, idafite impumuro kandi idahumanya cyangwa ifu ikomeye. Iterwa na cellulose ya alkaline na oxide ya ethylene (cyangwa chlorohydrin). Ni iya ether ya cellulose idafite ionic isoluble.

2. Uburyo butandukanye bwo gushonga
Hydroxypropyl methylcellulose: idashobora gushonga muri ethanol, ether na acetone. Umuti wa colloidal usobanutse neza cyangwa ufite ibicu bike ushongeshejwe mu mazi akonje.
Hydroxyethyl cellulose: Ifite imiterere yo gukurura, guhagarika, gufatanya, gukurura, gukwirakwiza no guhumeka. Ishobora gutegura ibisubizo mu bwoko butandukanye bw'ubushyuhe kandi ifite uburyo bwiza bwo gushonga umunyu kuri electrolytes.
Hydroxypropyl methylcellulose ifite imiterere yo kugira ubushobozi bwo gukuba, kudakomeza umunyu mwinshi, kudahinduka kwa pH, kubika amazi, kudahinduka kw'ibipimo, ubushobozi bwiza bwo gukora filime, kudahinduka kwa enzymes, gukwirakwira no guhuza ibintu.

Hari itandukaniro rinini hagati y’ibyo byombi, kandi akamaro kabyo mu nganda nako karatandukanye cyane.

Hydroxypropyl methylcellulose ikoreshwa cyane cyane nk'itsinda rinini, ritangiza kandi rigatuma ibintu bihora bihindagurika mu nganda zikora irangi, kandi ifite ubushobozi bwo gushonga neza mu mazi cyangwa mu bintu bisukura. Mu nganda z'ubwubatsi, ishobora gukoreshwa muri sima, gypsum, latex putty, plaster, nibindi, kugira ngo yongere ubushobozi bwo gushonga kw'umucanga wa sima no kunoza cyane uburyo bwo kubika amazi mu ruganda no kubika amazi mu ruganda.
Hydroxyethyl cellulose ifite imiterere yo gukurura, guhagarika, gufatanya, gushonga, gukwirakwiza no guhumeka. Ishobora gutegura ibisubizo mu bwoko butandukanye bw'ubushyuhe kandi ifite ubushobozi bwiza bwo gushonga k'umunyu kuri electrolytes. Hydroxyethyl cellulose ni igikoresho cyiza cyo gushushanya, gufata, gukurura, gushimangira no gukwirakwiza mu shampoo, spray y'umusatsi, neutralizers, conditioners na cosmetics; mu ifu yo kumesa Hagati hari ubwoko bw'ikintu gihindura imyanda. Hydroxyethyl cellulose ishonga vuba iyo ubushyuhe bwinshi bukabije, bishobora kwihutisha igikorwa cyo gukora no kunoza imikorere. Ikigaragara ku isabune irimo hydroxyethyl cellulose ni uko ishobora kunoza uburyo imyenda itunganywa neza kandi ikagira ubushyuhe bwinshi.