Hydroxypropyl starch ether (HPS)ndiether ya celluloseNdi zinthu ziwiri zodziwika bwino zomangira mankhwala, zomwe zimagwiritsidwa ntchito kwambiri popanga zinthu zomangira, monga matope, ufa wa putty, zokutira, ndi zina zotero. Ngakhale zili ndi zofanana m'zinthu zina, pali kusiyana kwakukulu m'mbali zambiri monga magwero a zinthu zopangira, kapangidwe ka mankhwala, katundu weniweni, zotsatira za ntchito, ndi ndalama.
1. Magwero a zinthu zopangira ndi kapangidwe ka mankhwala
Hydroxypropyl starch ether (HPS)
HPS imachokera ku starch yachilengedwe ndipo imapezeka kudzera mu etherification modification reaction. Zipangizo zake zazikulu ndi chimanga, tirigu, mbatata ndi zomera zina zachilengedwe. Mamolekyu a starch amapangidwa ndi mayunitsi a shuga olumikizidwa ndi ma bond a α-1,4-glycosidic ndi kuchuluka kochepa kwa ma bond a α-1,6-glycosidic. Pambuyo pa hydroxypropylation, gulu la hydrophilic hydroxypropyl limalowetsedwa mu kapangidwe ka molekyulu ya HPS, zomwe zimapangitsa kuti ikhale yolimba, yosunga madzi komanso yosintha.
ether ya cellulose
Ma ether a cellulose amachokera ku cellulose yachilengedwe, monga thonje kapena matabwa. Cellulose imapangidwa ndi mayunitsi a shuga olumikizidwa ndi ma bond a β-1,4-glycosidic. Ma ether a cellulose wamba ndi hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), hydroxyethyl cellulose (HEC), ndi zina zotero. Mankhwalawa amayambitsa zinthu zosiyanasiyana kudzera mu etherification reactions ndipo ali ndi kukhazikika kwa mankhwala komanso mphamvu zakuthupi.
2. Kapangidwe ka thupi
Makhalidwe a HPS
Kukhuthala: HPS ili ndi mphamvu yabwino yokhuthala, koma poyerekeza ndi cellulose ether, mphamvu yake yokhuthala ndi yofooka pang'ono.
Kusunga Madzi: HPS imakhala ndi madzi pang'ono ndipo ndi yoyenera kugwiritsa ntchito zipangizo zomangira zotsika mtengo mpaka zapakatikati.
Kugwira Ntchito: HPS imatha kukonza kugwira ntchito kwa matope ndikuchepetsa kugwa panthawi yomanga.
Kukana kutentha: HPS imakhudzidwa kwambiri ndi kutentha ndipo imakhudzidwa kwambiri ndi kutentha kwa mlengalenga.
Makhalidwe a ntchito ya ethers a cellulose
Kukhuthala: Cellulose ether imakhala ndi mphamvu yokhuthala kwambiri ndipo imatha kuwonjezera kwambiri kukhuthala kwa matope kapena putty.
Kusunga Madzi: Cellulose ether ili ndi mphamvu zabwino kwambiri zosunga madzi, makamaka m'malo otentha kwambiri, zomwe zimatha kuwonjezera nthawi yotsegulira matope ndikuletsa kutayika kwa madzi ambiri.
Kugwira Ntchito: Cellulose ether ndi yabwino kwambiri pakukonza kugwira ntchito bwino ndipo ingathandize kuchepetsa mavuto monga kusweka ndi kupukutidwa kwa ufa.
Kukana kutentha: Cellulose ether imatha kusintha kwambiri kutentha komanso magwiridwe antchito ake ndi okhazikika.
3. Zotsatira za ntchito
Zotsatira za kugwiritsa ntchitoHPS
Mu matope ouma, HPS imagwira ntchito makamaka pakukonza magwiridwe antchito, kukonza kusunga madzi, komanso kuchepetsa kugawanika ndi kugawa. Ndi yotsika mtengo komanso yoyenera kugwiritsidwa ntchito pazochitika zomwe zimafuna ndalama zambiri zowongolera, monga ufa wamba wamkati mwa khoma, matope olendewera pansi, ndi zina zotero.
Kugwiritsa ntchito kwa efa ya cellulose
Ma ether a celluloseAmagwiritsidwa ntchito kwambiri mu mortars ogwirira ntchito bwino, zomatira za matailosi, zipangizo zopangidwa ndi gypsum ndi makina oteteza makoma akunja. Makhalidwe ake abwino kwambiri okhuthala komanso kusunga madzi amatha kupititsa patsogolo mphamvu yomangirira ndi magwiridwe antchito osatsetseka a zinthuzo, ndipo ndi oyenera makamaka mapulojekiti omwe ali ndi zofunikira kwambiri pakugwira ntchito yomanga ndi mtundu wa chinthu chomalizidwa.
4. Kuteteza mtengo ndi chilengedwe
mtengo:
HPS ili ndi mtengo wotsika ndipo ndi yoyenera kugwiritsidwa ntchito m'misika yotsika mtengo. Ma ether a cellulose ndi okwera mtengo, koma amagwira ntchito bwino kwambiri ndipo ndi otsika mtengo pa ntchito zomanga zovuta.
Chitetezo cha chilengedwe:
Zonsezi zimachokera ku zinthu zachilengedwe ndipo zili ndi makhalidwe abwino oteteza chilengedwe. Komabe, chifukwa chakuti mankhwala ochepa amagwiritsidwa ntchito popanga HPS, ntchito yake yoteteza chilengedwe ikhoza kukhala yochepa.
5. Maziko osankha
Zofunikira pakugwira ntchito: Ngati muli ndi zofunikira kwambiri pakukhuthala ndi kusunga madzi, muyenera kusankha ether ya cellulose; pazinthu zomwe zimakhala zotsika mtengo koma zimafuna kusintha kwina pakugwira ntchito, mutha kuganizira kugwiritsa ntchito HPS.
Zochitika Zogwiritsidwa Ntchito: Kapangidwe kotentha kwambiri, kutchinjiriza khoma lakunja, guluu wa matailosi ndi zochitika zina zomwe zimafuna chithandizo chapamwamba ndizoyenera kwambiri pa cellulose ether; pa putty wamba wamkati kapena matope oyambira, HPS ikhoza kupereka mayankho otchipa komanso othandiza.
Hydroxypropyl starch etherndiether ya cellulose Chilichonse chili ndi ubwino wake ndipo chimagwira ntchito zosiyanasiyana pa zipangizo zomangira. Kusankha kuyenera kuganiziridwa mokwanira kutengera zofunikira pa ntchito, kuwongolera ndalama, malo omangira ndi zinthu zina za polojekitiyi kuti zigwiritsidwe ntchito bwino.
Nthawi yotumizira: Novembala-21-2024