Li-starch ether ke mofuta o fetotsoeng oa starch o fumaneng tlhokomelo e pharaletseng lits'ebetsong tse fapaneng tsa indasteri ka lebaka la ho tenyetseha ha tsona le thepa ea tsona e ikhethang. Le hoja e sebelisoa hangata likhomaretsing bakeng sa bokhoni ba eona ba ho kopanya, ho tšoaneleha ha eona bakeng sa libaka tse nang le mocheso o phahameng ho itšetlehile ka lintlha tse 'maloa.
1. Selelekela ho ether ea starch:
Li-starch ether ke lintho tse tsoang ho starch ea tlhaho, e leng li-polysaccharide tse fumanoang limela. Ka phetoho ea lik'hemik'hale, hangata e kenyelletsang etherification, li-starch ether li hlahisoa ho ntlafatsa thepa ea tsona le ho li etsa hore li lokele lits'ebetso tse itseng. Ts'ebetso ea phetoho e fetola thepa ea hydrophilic le hydrophobic ea starch, ka hona e ntlafatsa botsitso, ho qhibiliha le thepa ea rheological.
2. Litšobotsi tsa starch ether:
Li-starch ether li na le litšobotsi tse 'maloa tsa bohlokoa tse etsang hore li khahlehe bakeng sa mefuta e fapaneng ea lits'ebetso tsa indasteri, ho kenyeletsoa le likhomaretsi.
A. E qhibilihang ka Metsi: Li-starch ether li qhibiliha ka metsing 'me li ka kenyelletsoa habonolo mefuteng ea sekhomaretsi le ho khothaletsa litšobotsi tse ntle tsa ho kolobisa.
b. Bokhoni ba ho etsa filimi: Li-ether tsa starch li ka etsa lifilimi tse thusang sekhomaretsi ho khomarela bokaholimo le ho fana ka matla ho thepa ea sekhomaretsi.
C. Sekoekoe: Se sebetsa e le sekoekoe se setenya mefuteng ea sekhomaretsi, se ama ho teteana le ho ntlafatsa litšobotsi tsa ts'ebeliso.
d. Ho bola ha lintho tse phelang: Li-starch ether li nkiloe mehloling e nchafatsoang 'me ka hona li mosa tikolohong ebile li loketse lits'ebetso tse shebaneng le botsitso.
3. Ditshebediso tse kgomaretsang tsa ether ya starch:
Li-ether tsa starch li ka sebelisoa mefuteng e fapaneng ea sekhomaretsi, joalo ka:
A. Likhomaretsi tsa pampiri le liphutheloana: Li-ether tsa starch li sebelisoa hangata likhomaretsing tsa pampiri le liphutheloana ka lebaka la thepa ea tsona ea ho etsa filimi le ho khomarela.
b. Likhomaretsi tsa kaho: Ho qhibiliha ha metsi le bokhoni ba ho teteana ha starch ether li etsa hore e lokele ho sebelisoa e le likhomaretsi tsa kaho ho thusa ho kopanya thepa ea kaho.
C. Likhomaretsi tsa Lehong: Indastering ea ho betla mapolanka, li-starch ether li sebelisoa likhomaretsing tsa lehong ho matlafatsa matla a tlamahano le ho fana ka botsitso.
d. Likhomaretsi tsa masela: Ether ea starch e sebelisoa likhomaretsing tsa masela ka lebaka la bokhoni ba eona ba ho kopanya likhoele le ho eketsa matla a kakaretso a lesela.
4. Tshebetso tikolohong e nang le mocheso o phahameng:
Bakeng sa lits'ebetso moo ho kopanang le mocheso o phahameng, ts'ebetso ea li-ether tsa starch libakeng tse nang le mocheso o phahameng ke taba ea bohlokoa. Ho na le lintlha tse 'maloa tse amang boitšoaro ba eona tabeng ena:
A. Ho Tsitsisa Thempereichara: Li-ether tsa starch li bontša maemo a fapaneng a botsitso ba mocheso ho latela tekanyo ea tsona ea ho nkeloa sebaka le liphetoho tse ikhethileng tsa lik'hemik'hale tse sebelisitsoeng nakong ea ts'ebetso ea etherification.
b. Mocheso oa Gelatinization: Mocheso oa gelatinization oa starch ether ke paramethara ea bohlokoa lits'ebetsong tsa mocheso o phahameng 'me o tla angoa ke boima ba eona ba limolek'hule le tekanyo ea ho nkeloa sebaka.
C. Liphetoho tsa ho teteana: Lithempereichara tse phahameng li ka fetola ho teteana ha metsoako ea sekhomaretsi e nang le li-ether tsa starch. Ho utloisisa liphetoho tsena ho bohlokoa ho netefatsa ts'ebetso e tsitsitseng ea sekhomaretsi.
d. Matla a Tlamo: Matla a tlamo a di-formulations tse nang le starch ethers a ka angwa ke mocheso, kahoo kutlwisiso e batsi ya ditlhoko tse itseng tsa tshebediso e a hlokahala.
5. Leano la phetoho bakeng sa botsitso ba mocheso o phahameng:
E le ho ntlafatsa ho sebetsa ha starch ether maemong a mocheso o phahameng, maano a latelang a phetoho a ka sebelisoa:
A. Ho kopanya ka tsela e ts'oanang: Limolek'hule tsa ether tsa starch tse kopanyang ka tsela e ts'oanang li eketsa botsitso ba mocheso le ho hanyetsa liphetoho tsa viscosity tse bakoang ke mocheso.
b. Ho kopanya le li-polymer tse hanelang mocheso: Ho kopanya li-ether tsa starch le li-polymer tse hanelang mocheso ho ka etsa li-formulations tsa sekhomaretsi se kopantsoeng tse bolokang botsitso mochesong o phahameng.
C. Liphetoho tsa lik'hemik'hale: Liphetoho tse ling tsa lik'hemik'hale, joalo ka ho hlahisoa ha lihlopha tse sebetsang tse hanelang mocheso, li ka hlahlojoa ho etsa li-ether tsa starch bakeng sa lits'ebetso tse ikhethileng tsa mocheso o phahameng.
6. Lithuto tsa nyeoe le lits'ebetso tse sebetsang:
Ho hlahloba lithuto tsa linyeoe tsa lefats'e la sebele le lits'ebetso tse sebetsang ho fana ka temohisiso ea bohlokoa mabapi le ts'ebetso ea li-ether tsa starch libakeng tse nang le mocheso o phahameng. Liindasteri moo ho hanyetsa mocheso ho leng bohlokoa, joalo ka likoloi, lifofane le lisebelisoa tsa elektroniki, li ka fana ka mehlala ea bohlokoa.
7. Lintho tse lokelang ho nahanoa ka tikoloho:
Ha matšoenyeho a tikoloho a ntse a eketseha, ho bola ha li-starch ether ho eketsa molemo o moholo. Ho lekola tšusumetso ea tikoloho ea li-glue tse khomaretsoeng tse nang le li-starch ether lits'ebetsong tsa mocheso o phahameng bakeng sa mekhoa e tsitsitseng.
8. Litaelo tsa nakong e tlang le menyetla ea lipatlisiso:
Phuputso le ntshetsopele e tswelang pele lefapheng la phetoho ya starch ether e ka bula menyetla e metjha bakeng sa tshebediso ya yona dibakeng tse nang le mocheso o phahameng. Ho hlahloba mekgwa e metjha ya phetoho, ho utlwisisa mekgwa ya motheo ya botsitso ba mocheso, le ho hlwaya tshebedisano mmoho le di-polymer tse ding ke dibaka tse loketseng ho fuputswa.
9. Qetello:
Ka bokhutšoanyane, li-ether tsa starch ke bakhethoa ba tšepisang bakeng sa lits'ebetso tsa sekhomaretsi, tse nang le mefuta e fapaneng ea thepa e lakatsehang. Ts'ebetso ea eona libakeng tse phahameng tsa mocheso e itšetlehile ka ho nahana ka hloko ka lintlha tse kang botsitso ba mocheso, mocheso oa gelatinization le matla a tlamo. Ka liphetoho tsa maano le mekhoa e mecha, li-ether tsa starch li ka etsoa hore li sebetsane le liphephetso tse itseng tse hlahisoang ke mocheso o phahameng, li bula litsela tse ncha tsa ts'ebeliso ea tsona liindastering moo ho hanyetsa mocheso ho leng bohlokoa. Ha lipatlisiso li ntse li tsoela pele, karolo ea li-ether tsa starch lits'ebetsong tsa sekhomaretsi e ka 'na ea atoloha, e tiisa boemo ba tsona e le metsoako ea sekhomaretsi e feto-fetohang le e tsitsitseng.
Nako ea poso: Tshitwe-02-2023