Sebopeho sa Lik'hemik'hale le Moetsi oa Cellulose Ethers

Li-cellulose ethers ke sehlopha sa metsoako e sebelisoang haholo liindastering tse fapa-fapaneng, ho kenyeletsa kaho, lijo, meriana le tlhokomelo ea botho. Metsoako ena e tsoa ho cellulose, polymer ea tlhaho e fumanoang limela, 'me e hlahisoa ka mokhoa oa ho fetola lik'hemik'hale. Sehloohong sena, re tla tšohla sebopeho sa lik'hemik'hale tsa cellulose ethers le tse ling tsa baetsi ba ka sehloohong ba metsoako ena.

Sebopeho sa Lik'hemik'hale tsa Cellulose Ethers:

Li-cellulose ethers li nkiloe ho selulose, e leng polima e melang e entsoeng ka likaroloana tsa tsoekere tse hokahantsoeng ke beta-1,4 glycosidic bond. Karolo e pheta-phetoang ea cellulose e bontšitsoe ka tlase:

Phetoho ea lik'hemik'hale ea selulose ho hlahisa cellulose ethers e kenyelletsa ho nkela lihlopha tsa hydroxyl sebakeng sa ketane ea cellulose le lihlopha tse ling tse sebetsang. Lihlopha tse sebelisoang haholo bakeng sa morero ona ke methyl, ethyl, hydroxyethyl, hydroxypropyl, le carboxymethyl.

Methyl Cellulose (MC):

Methyl cellulose (MC) ke cellulose ether e hlahisoang ke ho nkela lihlopha tsa hydroxyl sebakeng sa ketane ea cellulose ka lihlopha tsa methyl. Tekanyo ea ho fetola (DS) ea MC e ka fapana ho tloha ho 0.3 ho isa ho 2.5, ho latela kopo. Boima ba molek'hule ea MC hangata bo maemong a 10,000 ho isa ho 1,000,000 Da.

MC ke phofo e tsoeu ho isa ho e tšoeu, e sa nkhang hamonate, 'me e sa latsoeheng e qhibilihang ka metsing le ka bongata ba metsoako ea tlhaho. Hangata e sebelisoa e le sekontiri, se tlamang, le emulsifier liindastering tse fapaneng, ho kenyeletsoa lijo, meriana, le tlhokomelo ea botho. Indastering ea kaho, MC e sebelisoa e le tlatsetso lihlahisoa tse thehiloeng ho samente ho ntlafatsa ts'ebetso, ho boloka metsi, le matla a sekhomaretsi.

Ethyl Cellulose (EC):

Ethyl cellulose (EC) ke cellulose ether e hlahisoang ke ho nkela lihlopha tsa hydroxyl sebakeng sa ketane ea cellulose ka lihlopha tsa ethyl. Tekanyo ea ho fetola (DS) ea EC e ka fapana ho tloha ho 1.5 ho isa ho 3.0, ho itšetlehile ka kopo. Boima ba limolek'hule tsa EC hangata bo maemong a 50,000 ho isa ho 1,000,000 Da.

EC ke phofo e tsoeu ho isa ho e tšoeu, e sa nkhang hamonate, 'me e sa latsoeheng e sa qhibiliheng metsing empa e qhibiliha ka har'a metsoako e mengata ea tlhaho. Hangata e sebelisoa e le setlamo, setlamo sa filimi, le moemeli oa nako e telele oa tokollo indastering ea meriana. Ho feta moo, EC e ka sebelisoa e le lisebelisoa tsa ho roala lijo le lihlahisoa tsa meriana ho ntlafatsa botsitso le ponahalo ea tsona.

Hydroxyethyl Cellulose (HEC):

Hydroxyethyl cellulose (HEC) ke cellulose ether e hlahisoang ke ho nkela lihlopha tsa hydroxyl sebakeng sa ketane ea cellulose ka lihlopha tsa hydroxyethyl. Tekanyo ea ho kenya sebaka (DS) ea HEC e ka fapana ho tloha ho 1.5 ho ea ho 2.5, ho itšetlehile ka kopo. Boima ba limolek'hule tsa HEC hangata bo ka har'a 50,000 ho isa ho 1,000,000 Da.

HEC ke phofo e tšoeu ho isa ho e tšoeu, e sa nkhang hamonate, 'me e sa latsoeheng e qhibilihang ka metsing le ka bongata ba metsoako ea tlhaho. Hangata e sebelisoa e le motenya, emulsifier, le stabilizer liindastering tse fapaneng, ho kenyeletsoa lijo, meriana, le tlhokomelo ea botho. Lefapheng la kaho, HEC e sebelisoa e le tlatsetso ea lihlahisoa tse entsoeng ka samente ho ntlafatsa ts'ebetso, ho boloka metsi le matla a sekhomaretsi.

Hydroxypropyl methyl cellulose (HPMC) ke cellulose ether e hlahisoang ke ho nkela lihlopha tsa hydroxyl sebakeng sa ketane ea cellulose ka hydroxypropyl le lihlopha tsa methyl. The degree of substitution (DS) ea HPMC e ka fapana ho tloha 0.1 ho 0.5 bakeng sa hydroxypropyl substitution le 1.2 ho 2.5 bakeng sa methyl substitution, ho itšetlehile ka kopo. Boima ba molek'hule ea HPMC hangata bo maemong a 10,000 ho isa ho 1,000,000 Da.

HPMC ke phofo e tsoeu ho isa ho e tšoeu, e sa nkhang hamonate, 'me e sa latsoeheng e qhibilihang ka metsing le ka bongata ba metsoako ea tlhaho. Hangata e sebelisoa e le sekontiri, se tlamang, le se emulsifier liindastering tse fapaneng, ho kenyeletsoa kaho, lijo, meriana, le tlhokomelo ea botho. Indastering ea kaho, HPMC e sebelisoa e le tlatsetso lihlahisoa tse thehiloeng ho samente ho ntlafatsa ts'ebetso, ho boloka metsi le matla a sekhomaretsi.

Baetsi ba Cellulose Ethers kantle ho naha:

Ho na le baetsi ba 'maloa ba ka sehloohong ba li-cellulose ethers, ho kenyeletsoa Dow Chemical Company, Ashland Inc., Shin-Etsu Chemical Co., Ltd., AkzoNobel NV, le Daicel Corporation.

Khamphani ea Dow Chemical ke e 'ngoe ea baetsi ba pele ba li-cellulose ethers, ho kenyeletsoa HPMC, MC, le EC. Khampani e fana ka mefuta e mengata ea limaraka le litlhaloso tsa lihlahisoa tsena, ho itšetlehile ka kopo. Li-cellulose ethers tsa Dow li sebelisoa liindastering tse fapaneng, ho kenyeletsoa kaho, lijo, meriana le tlhokomelo ea motho.

Ashland Inc. ke moetsi e mong ea ka sehloohong oa li-cellulose ethers, ho kenyeletsa HEC, HPMC, le EC. Khampani e fana ka mefuta e mengata ea limaraka le litlhaloso tsa lihlahisoa tsena, ho itšetlehile ka kopo. Li-cellulose ethers tsa Ashland li sebelisoa liindastering tse fapaneng, ho kenyeletsoa kaho, lijo, meriana le tlhokomelo ea motho.

Shin-Etsu Chemical Co., Ltd. ke k'hamphani ea lik'hemik'hale ea Japane e hlahisang li-cellulose ethers, ho kenyeletsoa HEC, HPMC, le EC. Khampani e fana ka mefuta e mengata ea limaraka le litlhaloso tsa lihlahisoa tsena, ho itšetlehile ka kopo. Li-cellulose ethers tsa Shin-Etsu li sebelisoa liindastering tse sa tšoaneng, ho akarelletsa le kaho, lijo, meriana le tlhokomelo ea botho.

AkzoNobel NV ke k'hamphani ea machaba ea Madache e hlahisang li-cellulose ethers, ho kenyeletsoa HEC, HPMC, le MC. Khampani e fana ka mefuta e mengata ea limaraka le litlhaloso tsa lihlahisoa tsena, ho itšetlehile ka kopo. Li-cellulose ethers tsa AkzoNobel li sebelisoa liindastering tse fapaneng, ho kenyeletsoa kaho, lijo, meriana le tlhokomelo ea motho.

Daicel Corporation ke k'hamphani ea lik'hemik'hale ea Japane e hlahisang li-cellulose ethers, ho kenyeletsa HPMC le MC. Khampani e fana ka mefuta e mengata ea limaraka le litlhaloso tsa lihlahisoa tsena, ho itšetlehile ka kopo. Li-cellulose ether tsa Daicel li sebelisoa liindastering tse fapaneng, ho kenyeletsoa kaho, lijo, meriana, le tlhokomelo ea motho.

Qetello:

Cellulose ethers ke sehlopha sa metsoako e nkiloeng ho selulose 'me e sebelisoa haholo liindastering tse fapaneng. Sebopeho sa lik'hemik'hale tsa cellulose ethers se kenyelletsa ho nkela lihlopha tsa hydroxyl sebakeng sa ketane ea cellulose le lihlopha tse ling tse sebetsang, tse kang methyl, ethyl, hydroxyethyl, hydroxypropyl, le carboxymethyl. Ho na le baetsi ba 'maloa ba ka sehloohong ba li-cellulose ethers, ho kenyeletsoa Dow Chemical Company, Ashland Inc., Shin-Etsu Chemical Co., Ltd., AkzoNobel NV, le Daicel Corporation. Likhamphani tsena li fana ka mefuta e mengata e fapaneng ea limaraka le litlhaloso tsa li-cellulose ethers, ho latela ts'ebeliso.