Hydroxypropyl starch ether (HPS)leether ea seluloseke di-additi tse pedi tse tlwaelehileng tsa dikhemikhale tsa kaho, tse sebediswang haholo thepa ya kaho, jwalo ka seretse, phofo ya putty, dikobo, jj. Le hoja di na le ho tshwana makgetheng a mang, ho na le dipharologanyo tse kgolo mahlakoreng a mangata jwalo ka mehlodi ya thepa e tala, dibopeho tsa dikhemikhale, thepa ya mmele, ditlamorao tsa tshebediso, le ditjeo.
1. Mehloli ea lintho tse tala le sebopeho sa lik'hemik'hale
Hydroxypropyl starch ether (HPS)
HPS e thehiloe holim'a starch ea tlhaho 'me e fumanoa ka karabelo ea phetoho ea etherification. Lisebelisoa tsa eona tse ka sehloohong tse tala ke poone, koro, litapole le limela tse ling tsa tlhaho. Limolek'hule tsa starch li entsoe ka li-unit tsa glucose tse hokahaneng le litlamo tsa α-1,4-glycosidic le palo e nyane ea litlamo tsa α-1,6-glycosidic. Kamora hydroxypropylation, sehlopha sa hydroxypropyl se hydrophilic se kenngoa ka har'a sebopeho sa limolek'hule tsa HPS, se se fa mesebetsi e itseng ea ho teteana, ho boloka metsi le ho fetola.
ether ea selulose
Li-ether tsa cellulose li tsoa ho cellulose ea tlhaho, joalo ka k'hothone kapa patsi. Cellulose e entsoe ka li-unit tsa glucose tse hokahaneng le litlamo tsa β-1,4-glycosidic. Li-ether tse tloaelehileng tsa cellulose li kenyelletsa hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), hydroxyethyl cellulose (HEC), jj. Metsoako ena e hlahisa lintho tse fapaneng tse nkeloang sebaka ka liketso tsa etherification 'me e na le botsitso bo phahameng ba lik'hemik'hale le thepa ea' mele.
2. Thepa ea 'mele
Litšobotsi tsa ts'ebetso ea HPS
Ho teteana: HPS e na le phello e ntle ea ho teteana, empa ha e bapisoa le ether ea cellulose, bokhoni ba eona ba ho teteana bo fokola hanyane.
Ho boloka metsi: HPS e na le ho boloka metsi ka tekanyo e itekanetseng 'me e loketse thepa ea kaho ea maemo a tlaase ho isa bohareng.
Ho sebetsa ha seretse: HPS e ka ntlafatsa ho sebetsa ha sona le ho fokotsa ho thekesela ha sona nakong ea kaho.
Ho hanyetsa mocheso: HPS e na le kutloelo-bohloko haholo mochesong 'me e angoa haholo ke mocheso o potolohileng.
Litšobotsi tsa tshebetso tsa ethers tsa selulose
Ho teteana: Cellulose ether e na le phello e matla ea ho teteana 'me e ka eketsa haholo ho teteana ha seretse kapa putty.
Ho boloka metsi: Cellulose ether e na le thepa e ntle ea ho boloka metsi, haholo-holo libakeng tse nang le mocheso o phahameng, e leng se ka eketsang nako ea ho buloa ha seretse le ho thibela tahlehelo e feteletseng ea metsi.
Bokgoni ba ho sebetsa: Cellulose ether e ntle haholo ho ntlafatseng bokgoni ba ho sebetsa mme e ka fokotsa mathata a kang ho petsoha le ho ntsha phofo ka katleho.
Ho hanyetsa mocheso: Cellulose ether e na le bokgoni bo matla ba ho ikamahanya le diphetoho tsa mocheso le tshebetso e tsitsitseng.
3. Litlamorao tsa ts'ebeliso
Phello ea ts'ebeliso eaHPS
Ho seretse se omileng, HPS e bapala karolo ea ho ntlafatsa ho sebetsa hantle, ho ntlafatsa ho boloka metsi, le ho fokotsa karohano le karohano. E theko e tlase ebile e loketse ho sebelisoa maemong a nang le litlhoko tse phahameng tsa taolo, joalo ka phofo e tloaelehileng ea putty ea leboteng la kahare, seretse se leka-lekaneng fatše, jj.
Phello ea kopo ea ether ea selulose
Li-ether tsa seluloseLi sebelisoa haholo ka har'a li-mortar tse sebetsang hantle, likhomaretsi tsa lithaele, thepa e thehiloeng ho gypsum le litsamaiso tsa ho thibela lebota ka ntle. Litšobotsi tsa eona tse phahameng tsa ho teteana le ho boloka metsi li ka ntlafatsa haholo matla a ho kopanya le ts'ebetso ea ho thibela ho thella ha thepa, 'me e loketse haholo merero e nang le litlhoko tse phahameng tsa ts'ebetso ea kaho le boleng ba sehlahisoa se felileng.
4. Litšenyehelo le tšireletso ea tikoloho
litšenyehelo:
HPS e na le theko e tlase 'me e loketse ho sebelisoa limmarakeng tse shebaneng le litheko. Li-ether tsa cellulose li theko e boima haholo, empa li na le ts'ebetso e ntle haholo 'me li theko e tlase mererong ea kaho e boima.
Tšireletso ea tikoloho:
Ka bobeli li tsoa linthong tsa tlhaho 'me li na le thepa e ntle ea tikoloho. Leha ho le joalo, kaha ho sebelisoa lik'hemik'hale tse fokolang ts'ebetsong ea tlhahiso ea HPS, moroalo oa eona oa tikoloho o ka ba tlase.
5. Motheo oa khetho
Litlhoko tsa tshebetso: Haeba o na le ditlhoko tse hodimo bakeng sa ho teteana le ho boloka metsi, o lokela ho kgetha ether ya cellulose; bakeng sa thepa e nang le ditjeo tse tlase empa e hloka dintlafatso tse itseng tsa ho sebetsa, o ka nahana ka ho sebedisa HPS.
Maemo a Tshebediso: Kaho ya mocheso o phahameng, ho kwahela lebota ka ntle, sekgomaretsi sa thaele le maemo a mang a hlokang tshehetso e phahameng a loketse haholo bakeng sa ether ya cellulose; bakeng sa putty e tlwaelehileng ya lebota la kahare kapa seretse sa motheo, HPS e ka fana ka ditharollo tse theko e tlase le tse sebetsang.
Hydroxypropyl starch etherleether ea selulose e 'ngoe le e 'ngoe e na le melemo ea eona 'me e bapala karolo e fapaneng thepa ea kaho. Khetho e hloka ho nahanoa ka botlalo ho latela litlhoko tsa ts'ebetso, taolo ea litšenyehelo, tikoloho ea kaho le lintlha tse ling tsa projeke e itseng ho fihlela phello e ntle ka ho fetisisa ea ts'ebeliso.
Nako ea poso: Pulungoana-21-2024