Hydroxypropyl methyl cellulose na carboxymethyl cellulose sodium bishobora kuvangwa

Ese HPMC na CMC bishobora kuvanga

Selulose ya MethylNi umweru cyangwa umweru nk'ifu y'udusimba cyangwa granular; Nta mpumuro, nta buryohe. Iki gicuruzwa kiri mu mazi cyiyongera kikavamo umuti wa colloidal usobanutse cyangwa utose gato; Ntigishonga muri ethanoli yuzuye, chloroform cyangwa diethyl ether. Gikwirakwira vuba kandi kikabyimba mu mazi ashyushye kuri 80-90 ℃, kandi kigashonga vuba nyuma yo gukonja. Umuti w'amazi uhoraho neza ku bushyuhe bw'icyumba, kandi ushobora gushonga ku bushyuhe bwinshi, kandi gel ishobora guhinduka hamwe n'umuti hamwe n'ubushyuhe.

Ifite ubushobozi bwo kumena neza, gukwirakwira, gufatana, gukuba, gukurura, kubika amazi no gukora firime, ndetse no kutavogerwa n'amavuta. Iyi firime ifite ubukomere bwiza, ubworoherane n'ubuhanga. Kubera ko idakoresha ioni, ishobora kuba ihuye n'izindi emulsifier, ariko yoroshye kuyikuramo umunyu, kandi umuti uhamye mu rugero rwa PH2 - 12. Sodium carboxymethyl cellulose Iki gicuruzwa ni umunyu wa sodium wa cellulose carboxymethyl ether, ni iya anionic cellulose ether, ni ifu y'umweru cyangwa iy'amata ifite fibrous cyangwa uduce duto, ubucucike bwa 0.5-0.7 g/sentimetero ya cubic, hafi ya yose nta mpumuro, nta buryohe, nta hygroscopic. Byoroshye gukwirakwizwa mu mazi mu gisubizo cya gelatinous kibonerana, ntigishongeshwa muri ethanol n'ibindi bishongesha by'umwimerere.

Iyo pH y'umuti w'amazi ari 6.5 — 8.5, ubushyuhe bw'umuti urimo amazi bugabanuka cyane iyo pH iri >10 cyangwa <5, kandi imikorere ikaba myiza iyo pH iri 7. Kugira ngo ubushyuhe bukomeze, ubushyuhe buzamuka vuba munsi ya 20℃, buhinduka buhoro buhoro kuri 45℃, kandi ubushyuhe bwa colloid n'imiterere yabyo bigabanuka cyane iyo bishyushye igihe kirekire hejuru ya 80℃. Bishongesha mu mazi byoroshye, bibonerana; Bihamye cyane mu muti wa alkaline, kandi byoroshye gushonga iyo ari aside. Iyo pH iri 2-3, hazagwa imvura, kandi hazagwa imvura iyo ari umunyu mwinshi w'icyuma. Hydroxypropyl methyl cellulose, izwi kandi nka hydroxypropyl methyl cellulose, cellulose hydroxypropyl methyl ether, ni uburyo bwo guhitamo cellulose y'ipamba nziza cyane nk'ibikoresho fatizo, mu bihe bya alkaline hakoreshejwe uburyo bwihariye bwo gupima no gutegura.

Irashonga mu mazi no muri polar C nyinshi hamwe n'igipimo gikwiye cya ethanol/amazi, propanol/amazi, dichloroethane, nibindi, ntishonga muri diethyl ether, acetone, ethanol yuzuye, ibyimba mu mazi akonje ikagera mu gisubizo cya colloidal gisobanutse cyangwa gifite umwuka utose. Igisubizo cy'amazi gifite imikorere yo hejuru, mucyo mwinshi kandi gihoraho.HPMCifite imiterere nk'iya gel ishyushye. Iyo imaze gushyuha, umuti w'amazi utuma gel igwa, hanyuma igashonga nyuma yo gukonja. Ubushyuhe bwa gel butandukanye buratandukanye.