Starch ethers ke mofuta o fetotsoeng oa starch o fumaneng tlhokomelo e atileng lits'ebetsong tse fapaneng tsa indasteri ka lebaka la ho feto-fetoha ha tsona le thepa e ikhethang.Le hoja e atisa ho sebelisoa ho li-adhesives bakeng sa bokhoni ba eona ba ho kopanya, ho tšoaneleha ha eona bakeng sa libaka tse phahameng tsa mocheso ho itšetlehile ka lintlha tse 'maloa.
1. Kenyelletso ea starch ether:
Li-starch ethers li tsoa ho starch ea tlhaho, e leng polysaccharides e fumanoang limela.Ka phetoho ea lik'hemik'hale, hangata e kenyelletsang etherification, li-ether tsa starch li hlahisoa ho ntlafatsa thepa ea tsona le ho li etsa hore li tšoanelehe bakeng sa lisebelisoa tse khethehileng.Mokhoa oa ho fetola o fetola thepa ea hydrophilic le hydrophobic ea starch, kahoo e ntlafatsa botsitso, solubility le thepa ea rheological.
2. Lintho tse ntle tsa starch ether:
Li-starch ethers li na le lisebelisoa tse 'maloa tsa bohlokoa tse li etsang hore li khahle lits'ebetso tse fapaneng tsa indasteri, ho kenyelletsa le likhomaretsi.Lintho tsena li kenyelletsa:
A. Metsi a qhibilihang: Li-starch ethers li qhibiliha ka metsing 'me li ka kenngoa habonolo metsoakong ea sekhomaretsi le ho khothalletsa mekhoa e metle ea ho kolobisa.
b.Bokhoni ba ho etsa lifilimi: Li-starch ethers li ka etsa lifilimi tse thusang sekhomaretsi hore se khomarele holimo le ho fana ka matla ho sekhomaretsi.
C. Thickener: E sebetsa e le motenya ka har'a metsoako ea sekhomaretsi, e amang viscosity le ho ntlafatsa litšobotsi tsa kopo.
d.Biodegradability: Starch ethers e tsoa mehloling e ka nchafatsoang, ka hona, ha e na tikoloho ebile e loketse lits'ebetso tse shebaneng le ho tšoarella.
3. Lisebelisoa tsa sekhomaretsi tsa starch ether:
Li-starch ethers li ka sebelisoa mefuteng e fapaneng ea sekhomaretsi, joalo ka:
A. Likhomaretsi tsa pampiri le liphutheloana: Li-starch ethers li sebelisoa hangata ho etsa lipampiri le likhomaretsi tsa ho paka ka lebaka la sebopeho sa tsona sa filimi le sekhomaretsi.
b.Likhomaretsi tsa kaho: Ho qhibiliha ha metsi le bokhoni bo botenya ba starch ether bo etsa hore e tšoanelehe ho sebelisoa e le likhomaretsi tsa kaho ho thusa thepa ea kaho ea tlamo.
C. Li-Adhesives tsa Lehong: Lefapheng la mapolanka, li-starch ethers li sebelisoa ka li-adhesives tsa lehong ho matlafatsa matla a tlamahano le ho fana ka botsitso.
d.Likhomaretsi tsa masela: Starch ether e sebelisoa ka har'a likhomaretsi tsa masela ka lebaka la bokhoni ba eona ba ho kopanya likhoele le ho eketsa matla a kakaretso a lesela.
4. Ts'ebetso sebakeng sa mocheso o phahameng:
Bakeng sa lits'ebetso moo mocheso o phahameng o kopanang le ona, ts'ebetso ea li-starch ethers libakeng tsa mocheso o phahameng ke taba ea bohlokoa.Ho na le lintlha tse 'maloa tse amang boitšoaro ba eona tabeng ena:
A. Thermal Stability: Starch ethers e bontša likhato tse fapaneng tsa botsitso ba mocheso ho itšetlehile ka tekanyo ea tsona ea ho fetola le liphetoho tse khethehileng tsa lik'hemik'hale tse sebelisoang nakong ea ts'ebetso ea etherification.
b.Thempereichara ea Gelatinization: Mocheso oa gelatinization oa starch ether ke parameter ea bohlokoa lits'ebetsong tse phahameng tsa mocheso 'me o tla angoa ke boima ba molek'hule le tekanyo ea ho fetola.
C. Viscosity e fetoha: Lithempereichara tse phahameng li ka fetola ponahalo ea sekhomaretsi se nang le starch ethers.Ho utloisisa liphetoho tsena ho bohlokoa ho netefatsa ts'ebetso e tsitsitseng ea sekhomaretsi.
d.Matla a Bond: Matla a bond ea metsoako e nang le starch ethers a ka angoa ke mocheso, kahoo ho hlokahala kutloisiso e feletseng ea litlhoko tse khethehileng tsa kopo.
5. Leano la phetoho bakeng sa botsitso bo phahameng ba mocheso:
Bakeng sa ho matlafatsa ts'ebetso ea starch ether maemong a mocheso o phahameng, ho ka sebelisoa mekhoa e latelang ea phetoho:
A. Cross-linking: Cross-linking starch ether molecules e eketsa botsitso ba mocheso le ho hanyetsa liphetoho tsa viscosity tse bakoang ke mocheso.
b.Ho kopanya le li-polymers tse thibelang mocheso: Ho kopanya li-starch ethers le li-polymers tse thibelang mocheso ho ka etsa metsoako e kopanyang ea sekhomaretsi se bolokang botsitso mochesong o phahameng.
C. Liphetoho tsa lik'hemik'hale: Liphetoho tse ling tsa lik'hemik'hale, tse kang ho kenyelletsa lihlopha tse sebetsang tse thibelang mocheso, li ka hlahlojoa ho lokisa li-starch ethers bakeng sa lisebelisoa tse khethehileng tsa mocheso o phahameng.
6. Lithuto tsa mohlala le lisebelisoa tse sebetsang:
Ho hlahloba lithuto tsa 'nete tsa lefats'e le lits'ebetso tse sebetsang ho fana ka lintlha tsa bohlokoa mabapi le ts'ebetso ea starch ethers libakeng tse phahameng tsa mocheso.Liindasteri moo ho hanyetsa mocheso ho leng bohlokoa, tse kang likoloi, sefofane le lisebelisoa tsa elektronike, li ka fana ka mehlala ea bohlokoa.
7. Maikutlo a tikoloho:
Ha matšoenyeho a tikoloho a ntse a eketseha, ho senyeha ha biodegradability ea starch ether ho eketsa molemo o moholo.Ho lekola phello ea tikoloho ea li-adhesive formulations tse nang le starch ethers lits'ebetsong tse phahameng tsa mocheso bakeng sa mekhoa e tsitsitseng.
8. Litaelo tsa kamoso le menyetla ea lipatlisiso:
Patlisiso e tsoelang pele le nts'etsopele lefapheng la phetoho ea starch ether e ka bula menyetla e mecha bakeng sa ts'ebeliso ea eona libakeng tse phahameng tsa mocheso.Ho hlahloba mekhoa e mecha ea ho fetola, ho utloisisa mekhoa ea motheo ea botsitso ba mocheso, le ho khetholla likamano le li-polymer tse ling ke libaka tse loketseng tsa lipatlisiso.
9. Qetello:
Ka bokhuts'oane, li-starch ethers li ts'episa lits'ebetso tsa sekhomaretsi, tse nang le mefuta e mengata e lakatsehang.Ts'ebetso ea eona libakeng tsa mocheso o phahameng o itšetlehile ka ho hlahloba ka hloko lintlha tse kang botsitso ba mocheso, mocheso oa gelatinization le matla a tlamahano.Ka liphetoho tsa maqheka le mekhoa e mecha, li-starch ethers li ka etsoa ho sebetsana le mathata a khethehileng a bakoang ke mocheso o phahameng, ho bula litsela tse ncha tsa tšebeliso ea tsona liindastering moo ho hanyetsa mocheso ho leng bohlokoa.Ha lipatlisiso li ntse li tsoela pele, karolo ea starch ethers lits'ebetsong tsa sekhomaretsi e kanna ea atoloha, e tiisa boemo ba tsona e le metsoako e khomarelang e mengata le e tšoarellang.
Nako ea poso: Dec-02-2023