Ama-starch ether ayindlela eguquliwe yesitashi esiye sathola ukunakwa kabanzi ezinhlotsheni ezahlukene zezimboni ngenxa yokuguquguquka kwawo kanye nezakhiwo zawo ezihlukile. Nakuba ivame ukusetshenziswa kuma-adhesive ngenxa yamakhono ayo okubopha, ukufaneleka kwayo ezindaweni ezishisa kakhulu kuncike ezintweni eziningana.
1. Isingeniso ku-starch ether:
Ama-starch ethers asuselwa ku-starch yemvelo, okuyi-polysaccharides etholakala ezitshalweni. Ngokushintsha kwamakhemikhali, okuvame ukubandakanya i-etherification, ama-starch ethers akhiqizwa ukuze kuthuthukiswe izakhiwo zawo futhi azenze zifaneleke kakhulu ekusetshenzisweni okuthile. Inqubo yokuguqula ishintsha izakhiwo ze-hydrophilic kanye ne-hydrophobic ze-starch, ngaleyo ndlela ithuthukise ukuzinza, ukuncibilika kanye nezakhiwo ze-rheological.
2. Izakhiwo ze-starch ether:
Ama-starch ether anezakhiwo eziningana ezibalulekile ezenza zikhangeke ezinhlotsheni ezahlukene zezimboni, okuhlanganisa nezinamathiseli. Lezi zakhiwo zifaka:
A. Amanzi Ancibilikayo: Ama-starch ether ayancibilika emanzini futhi angafakwa kalula ezinhlanganisweni zokunamathela futhi akhuthaze izakhiwo ezinhle zokumanzisa.
b. Ikhono lokwenza ifilimu: Ama-starch ether angakha amafilimu asiza i-glue ukuthi inamathele ebusweni futhi anikeze amandla ezintweni ezinamathelayo.
C. Isiqinisi: Sisebenza njengesiqinisi ekwakhiweni kwe-glue, sithinta i-viscosity futhi sithuthukisa izici zokusetshenziswa.
d. Ukubola: Ama-starch ether atholakala ezinsizeni ezivuselelekayo ngakho-ke anobungani nemvelo futhi afanele ukusetshenziswa okugxile ekusimeni.
3. Ukusetshenziswa okunamathelayo kwe-starch ether:
Ama-starch ether angasetshenziswa ezinhlobonhlobo zezindlela zokunamathela, njenge:
A. Izinamathiseli zephepha nokupakisha: Ama-starch ether avame ukusetshenziswa ezinamathiselweni zephepha nokupakisha ngenxa yezakhiwo zawo zokwakha ifilimu kanye nokunamathela.
b. Izinamathiseli zokwakha: Ukuncibilika kwamanzi kanye nekhono lokujiya le-starch ether kwenza ifaneleke ukusetshenziswa njengezinamathiseli zokwakha ukusiza ukubopha izinto zokwakha.
C. Izinamathiselo Zokhuni: Embonini yokusebenza ngokhuni, ama-starch ether asetshenziswa ezinamathiselweni zokhuni ukuze kuthuthukiswe amandla okubopha futhi kuhlinzekwe ukuqina.
d. Izinamathiseli Zendwangu: I-starch ether isetshenziswa ezinamathiselweni zendwangu ngenxa yekhono layo lokubopha imicu futhi yandise amandla endwangu iyonke.
4. Ukusebenza endaweni yokushisa okuphezulu:
Ezinhlelweni lapho kuhlangana khona amazinga okushisa aphezulu, ukusebenza kwama-starch ether ezindaweni ezinokushisa okuphezulu kuyinto ebalulekile. Kunezici eziningana ezithinta ukuziphatha kwawo kulokhu:
A. Ukuzinza Kokushisa: Ama-starch ether abonisa amazinga ahlukahlukene okuzinza kokushisa kuye ngokuthi angakanani amazinga okushintshana kanye nokuguqulwa kwamakhemikhali athile okusetshenziswa ngesikhathi senqubo yokushintshaniswa kwe-ether.
b. Izinga lokushisa le-gelatinization: Izinga lokushisa le-gelatinization le-starch ether liyipharamitha ebalulekile ekusetshenzisweni kwezinga lokushisa eliphezulu futhi lizothinteka yisisindo salo sama-molecule kanye nezinga lokushintshana.
C. Izinguquko zokuqina: Amazinga okushisa aphezulu angashintsha ukuqina kwezakhi zokunamathela eziqukethe ama-starch ether. Ukuqonda lezi zinguquko kubalulekile ekuqinisekiseni ukusebenza okunamathelayo okuqhubekayo.
d. Amandla Esibopho: Amandla esibopho sezinto eziqukethe ama-starch ethers angathinteka yizinga lokushisa, ngakho-ke ukuqonda okuphelele kwezidingo ezithile zokusetshenziswa kuyadingeka.
5. Isu lokuguqulwa kokuqina kokushisa okuphezulu:
Ukuze kuthuthukiswe ukusebenza kwe-starch ether ezindaweni ezishisa kakhulu, kungasetshenziswa amasu okuguqula alandelayo:
A. Ukuxhumanisa: Ama-molecule e-ether e-starch axhumanisayo andisa ukuzinza kokushisa kanye nokumelana nezinguquko ze-viscosity ezibangelwa ukushisa.
b. Ukuxuba nama-polymer amelana nokushisa: Ukuhlanganisa ama-starch ether nama-polymer amelana nokushisa kungakha amafomula okunamathela ahlanganisiwe agcina ukuqina emazingeni okushisa aphezulu.
C. Ukuguqulwa kwamakhemikhali: Ukuguqulwa okwengeziwe kwamakhemikhali, njengokwethulwa kwamaqembu asebenzayo angamelani nokushisa, kungahlolwa ukuze kulungiselelwe ama-starch ethers ukuze kusetshenziswe izinhlelo ezithile zokushisa okuphezulu.
6. Izifundo zamacala kanye nezicelo ezisebenzayo:
Ukuhlola izifundo zamacala zomhlaba wangempela kanye nezicelo ezisebenzayo kunikeza ukuqonda okubalulekile ngokusebenza kwama-starch ether ezindaweni ezishisa kakhulu. Izimboni lapho ukumelana nokushisa kubaluleke kakhulu, njengezimoto, izindiza kanye ne-elekthronikhi, zinganikeza izibonelo ezibalulekile.
7. Izinto okufanele zicatshangelwe ngezemvelo:
Njengoba ukukhathazeka ngemvelo kuya ngokuya kuba yinto ebaluleke kakhulu, ukubola kwe-starch ethers kunezela inzuzo enkulu. Ukuhlola umthelela wemvelo wezinto ezinamathelayo eziqukethe i-starch ethers ekusetshenzisweni kwezinga lokushisa eliphezulu kwemikhuba eqhubekayo.
8. Iziqondiso zesikhathi esizayo kanye namathuba ocwaningo:
Ucwaningo oluqhubekayo kanye nentuthuko emkhakheni wokuguqulwa kwe-starch ether kungavula amathuba amasha okusetshenziswa kwayo ezindaweni ezishisa kakhulu. Ukuhlola amasu amasha okuguqulwa, ukuqonda izindlela eziyisisekelo zokuzinza kokushisa, kanye nokuhlonza ukusebenzisana namanye ama-polymer kuyizindawo ezifanele ukuphenywa.
9. Isiphetho:
Ngamafuphi, ama-starch ethers ayindlela ethembisayo yokufaka izinto zokunamathela, anezakhiwo eziningi ezifiselekayo. Ukusebenza kwawo ezindaweni zokushisa okuphezulu kuncike ekucabangeni ngokucophelela izici ezifana nokuzinza kokushisa, izinga lokushisa le-gelatinization kanye namandla e-bond. Ngokusebenzisa izinguquko zamasu kanye nokwakheka okusha, ama-starch ethers angalungiswa ukuze abhekane nezinselele ezithile ezibangelwa amazinga okushisa aphezulu, kuvulwe izindlela ezintsha zokusetshenziswa kwawo ezimbonini lapho ukumelana nokushisa kubalulekile khona. Njengoba ucwaningo luqhubeka, indima yama-starch ethers ekusetshenzisweni kokunamathela cishe izokhula, iqinise isikhundla sayo njengezithako zokunamathela eziguquguqukayo nezihlala isikhathi eside.
Isikhathi sokuthunyelwe: Disemba-02-2023