I-starch ether ligama eliqhelekileyo kwiklasi yesitatshi esilungisiweyo esinezibophelelo ze-ether kwi-molecule, eyaziwa ngokuba yi-starch etherified, esetyenziswa ngokubanzi kumayeza, ukutya, i-textile, i-papermaking, imichiza yemihla ngemihla, i-petroleum kunye namanye amashishini. Namhlanje sichaza ubukhulu becala indima yesitatshi ether kumdaka.
Intshayelelo ye-Starch Ether
Ezona zixhaphakileyo neziqhelekileyo zisetyenziswa sisitatshi setapile, isitatshi setapioca, isitatshi sombona, istatshi sengqolowa, njl.njl. Xa kuthelekiswa nesitatshi secereal esinamafutha aphezulu kunye nesiqulatho seproteni, isitatshi sesityalo esiyingcambu esifana neitapile kunye netapioca sisulungekile.
Isitatshi yipolysaccharide macromolecular compound eyenziwe yiglucose. Kukho iindidi ezimbini zeamolekyu, ezihambelanayo kunye ne-branched, ezibizwa ngokuba yi-amylose (malunga ne-20%) kunye ne-amylopectin (malunga ne-80%). Ukuze kuphuculwe iipropati zesitashi ezisetyenziselwa izinto zokwakha, iindlela eziphathekayo kunye neekhemikhali zingasetyenziselwa ukuyiguqula ukwenza iimpawu zayo zifaneleke ngakumbi kwiinjongo ezahlukeneyo zezinto zokwakha.
Isitatshi se-Etherified siquka iintlobo ezahlukeneyo zeemveliso. Ezifana ne-carboxymethyl starch ether (CMS), i-hydroxypropyl starch ether (HPS), i-hydroxyethyl starch ether (HES), i-cationic starch ether, njl. Ngokuqhelekileyo kusetyenziswa i-hydroxypropyl starch ether.
Indima ye-hydroxypropyl starch ether kudaka
1) Khubaza udaka, unyuse i-anti-sagging, anti-sagging kunye neempawu zerheological zodaka.
Umzekelo, kulwakhiwo lwe-adhesive tile, putty, kunye nodaka lokutyabeka, ngakumbi ngoku ukuba ukutshiza ngoomatshini kufuna ulwelo oluphezulu, olufana nodaka olusekwe kwigypsum, kubaluleke kakhulu (igypsum etshizwe ngomatshini ifuna ubumanzi obuphezulu kodwa iya kubangela ukudodobala okukhulu. , isitashi sikaEtere sinokwenza le ntsilelo).
Ulwelo kunye nokunganyangeki kwe-sag zihlala ziphikisana, kwaye ukunyuka kwamanzi kuya kukhokelela ekunciphiseni ukuxhathisa kwe-sag. Udaka oluneempawu ze-rheological lunokusombulula kakuhle ukuchasana okunjalo, oko kukuthi, xa kusetyenziswa amandla angaphandle, i-viscosity iyancipha, iphucula ukusebenza kunye nokumpompa, kwaye xa amandla angaphandle ehoxisiwe, i-viscosity iyanda kwaye ukuxhathisa ukuguquguquka kuphuculwe.
Kwimeko yangoku yokwandisa indawo yethayile, ukongeza isitashi se-ether kunokuphucula ukuchasana kwe-slip ye-adhesive tile.
2) Iiyure zokuvula ezongeziweyo
Ukufumana i-tile ye-tile, inokuhlangabezana neemfuno ze-adhesives ezikhethekileyo ze-tile (i-Class E, i-20min eyandisiweyo ukuya kwi-30min ukufikelela kwi-0.5MPa) eyandisa ixesha lokuvula.
Iipropati zomphezulu eziphuculweyo
Isitatshi se-ether sinokwenza umphezulu wesiseko segypsum kunye nodaka lwesamente lube lula, ukulusebenzisa lula, kwaye lunesiphumo esihle sokuhombisa. Kunentsingiselo enkulu yokutyabeka udaka kunye nodaka olucekethekileyo lokuhombisa olufana ne-putty.
Indlela yokusebenza ye-hydroxypropyl starch ether
Xa isitashi se-ether sinyibilika emanzini, siya kusasazwa ngokufanayo kwinkqubo yodaka lwesamente. Ekubeni i-molecule ye-starch ether inesakhiwo sothungelwano kwaye ihlawuliswa kakubi, iya kuthabatha iinqununu zesamente ezihlawulweyo kwaye isebenze njengebhuloho yenguqu yokudibanisa i-samente, ngaloo ndlela inika Ixabiso elikhulu lemveliso ye-slurry inokuphucula i-anti-sag okanye i-anti-slip. isiphumo.
Umahluko phakathi kwe-hydroxypropyl starch ether kunye ne-cellulose ether
1. Isitashi i-ether inokuphucula ngokufanelekileyo i-anti-sag kunye ne-anti-slip properties of mortar
I-Cellulose ether ngokuqhelekileyo inokuphucula kuphela i-viscosity kunye nokugcinwa kwamanzi kwenkqubo kodwa ayikwazi ukuphucula iimpawu ezichasayo kunye ne-anti-slip.
2. Ukutyeba kunye ne-viscosity
Ngokuqhelekileyo, i-viscosity ye-cellulose ether imalunga namashumi amawaka, ngelixa i-viscosity ye-starch ether ingamakhulu aliqela ukuya kwamawaka aliqela, kodwa oku akuthethi ukuba isitashi se-ether sinepropathi eyomeleleyo yokungenisa umoya, ngelixa isitashi ether singenayo ipropathi yokungenisa umoya. .
5. Isakhiwo semolekyuli ye-cellulose ether
Nangona zombini isitashi kunye ne-cellulose zenziwe ngeamolekyu ze-glucose, iindlela zabo zokuqulunqa zahlukile. I-orientation yazo zonke iimolekyuli zeglucose kwistatshi iyafana, ngelixa i-cellulose ichasene, kwaye ukuqhelaniswa kwemolekyuli yeglucose nganye esecaleni kuchasene. Lo mahluko wesakhiwo kwakhona umisela umahluko kwiipropati ze-cellulose kunye nesitashi.
Ixesha lokuposa: Apr-10-2023