Zvigadzirwa zveGypsum-zvakakosha mukuvaka uye maindasitiri ekushandisa nekuda kwezvivakwa zvavo zvakasiyana. Kuvandudza maitiro avo ekuita senge processability uye kupararira kwakakosha pakubudirira uye kunaka. Imwe nzira inoshanda yekuita izvi kuvandudzwa ndeyekubatanidzwa kwe starch ethers. Aya akagadziridzwa masita anoita basa rakakosha mukugadzirisa kushanda kwegypsum plasters, achipa akawanda mabhenefiti maererano nerheology, adhesion, uye kugadzikana.
Chemical Properties uye Mechanism Yekuita
Starch ether zvinobva kune zvakasikwa starch izvo zvakagadziridzwa kemikari kuunza ether linkages. Kugadziriswa kwakajairika kunosanganisira hydroxypropylation, carboxymethylation, uye cationization, zvichikonzera hydroxypropyl starch ether (HPS), carboxymethyl starch ether (CMS), uye cationic starch ether (CSE), zvichiteerana. Aya magadzirirwo anoshandura chimiro chemuviri uye chemakemikari zvimiro zvestarch, zvichiwedzera kuenderana kwayo negypsum uye kugona kwayo kugadzirisa rheological maitiro emusanganiswa.
Rheological Control: Starch ethers inonyanya kukanganisa rheology yegypsum-based products. Nekubatana nemvura, starch ethers inozvimba uye inoumba gel-like network. Iyi network inowedzera viscosity yemusanganiswa, kudzivirira kupatsanurwa kwezvikamu uye kuchengetedza yunifomu kusagadzikana. Iyo inokwidziridzwa viscosity inovandudza kushanda kwegypsum plasters, zvichiita kuti zvive nyore kusanganisa, kuisa, uye kutsvedzerera kunze. Uku kutonga pamusoro pe viscosity zvakare kunobvumira kubata zvirinani uye kunoderedza sagging uye kudonha panguva yekushandisa.
Kuchengeta Mvura: Starch ethers inowedzera kuchengetwa kwemvura mumisanganiswa yegypsum. Vanogadzira chipingamupinyi chinoderedza kubuda kwemvura, zvichipa nguva yakawanda yekuti plaster igare zvakanaka. Kuvandudzwa kwekuchengetedza mvura kunovimbisa kukwana hydration yegypsum crystals, inotungamira kune yakasimba uye yakasimba yekupedzisira chigadzirwa. Izvi zvinonyanya kukosha munzvimbo dzinopisa kana dzakaoma apo kurasikirwa kwemvura nokukurumidza kunogona kukanganisa kutendeseka kwepurasita.
Kuvandudzwa Kunamatira uye Kubatana: Kuvapo kwe starch ethers kunonatsiridza kunamatira kwegypsum plasters kune substrates uye kunowedzera kubatanidzwa kwepurasita pachayo. Izvi zvinowanikwa kuburikidza nekugadzirwa kwehydrogen zvisungo pakati pemamorekuru e starch uye gypsum particles, zvichiita kuti matrix akasimba uye akabatana. Kunatsiridza kunamatira kunovimbisa kuti plaster inoramba yakanyatsobatanidzwa nepamusoro, nepo kuwedzeredzwa kubatana kunodzivirira kutsemuka uye kunatsiridza kusimba kwese kwepurasita.
Mabhenefiti Anoshanda muGypsum-Yakavakirwa Zvigadzirwa
Kubatanidzwa kwe starch ethers mune gypsum-based zvigadzirwa kunoshandura kune akati wandei mabhenefiti mukuvaka uye maindasitiri ekushandisa.
Enhanced Workability: Kuvandudza rheological properties kunoreva kuti gypsum plasters yakasanganiswa ne starch ethers iri nyore kushanda nayo. Vanogona kupararira zvakanyanya uye zvakaenzana, kuderedza kushanda kunodiwa panguva yekushandisa. Uku kukwidziridzwa kushanda kunonyanya kubatsira mumapurojekiti makuru ekuvaka uko kushanda uye nyore kushandisa kwakakosha.
Yakawedzerwa Nguva Yakazaruka: Iyo yakagadziridzwa yekuchengetedza mvura zvivakwa zve starch ethers inowedzera nguva yakavhurika yegypsum plasters. Nguva yekuvhurika inoreva nguva iyo plaster inoramba ichishanda isati yatanga kuseta. Nguva yakareba yakavhurika inobvumira vashandi kugadzirisa uye kugadzirisa pasina iyo plaster yekumisikidza nguva isati yakwana. Uku kuchinjika kwakakosha mukuwana kupedzisa kwemhando yepamusoro, kunyanya mubasa rakaomarara kana rakadzama.
Yakaderedzwa Shrinkage uye Kutsemuka: Kuwedzerwa kuchengetwa kwemvura uye kunamira kwakagadziridzwa kunoderedza njodzi yekuderera uye kuputika muchigadzirwa chekupedzisira. Starch ethers inobatsira kuchengetedza mwando mukati mepurasita, kuve nechokwadi chekuomesa kwakafanana. Izvi zvinotungamira kune imwe yakagadzikana uye inopokana-inopokana, iyo yakakosha kune ese aesthetic uye chimiro kuvimbika.
Mabhenefiti Ezvakatipoteredza: Starch ethers inotorwa kubva kune zvinogona kudzokororwa zviwanikwa, zvichiita kuti ive yekuwedzera ine hushamwari kwezvakatipoteredza. Kushandisa kwavo muzvigadzirwa zvegypsum-based zvinogona kuderedza kuvimba nemapolymers ekugadzira uye zvimwe zvisingadzokerike zvekuwedzera. Izvi zvinoenderana nekukura kuri kudiwa kwezvinhu zvinogara zvichivaka uye maitiro.
Zvishandiso muZvigadzirwa Zvakasiyana-siyana zveGypsum
Starch ethers inowana kushandiswa mune zvakasiyana-siyana zvegypsum-based zvigadzirwa, imwe neimwe ichibatsirwa kubva kune yakagadziridzwa processability uye kupararira kwavanopa.
Gypsum Plasters: Kune akajairwa madziro uye sirin'i plasters, starch ethers inovandudza kureruka kwekushandisa uye kupedzisa kunaka. Ivo vanobatsira kuwana yakatsetseka, kunyangwe nzvimbo dzine hurema hudiki, kuderedza kudiwa kwekuwedzera kupedzisa basa.
Joint Compounds: Mumakomponi akabatanidzwa anoshandiswa kuvharisa drywall seams, starch ethers inosimudzira kupararira uye kunamatira, kuve nechokwadi chekupedza isina musono uye kwakasimba. Ivo zvakare vanonatsiridza kureruka kwejecha kana komboni yaoma, zvichitungamira kune imwe nzvimbo yekupedzisira yakatsetseka.
Self-Leveling Compounds: Mukuzvimisikidza pasi makomisheni, starch ethers anobatsira pakuyerera uye kuenzana zvivakwa, kuve nechokwadi kuti sandara uye kunyange pamusoro. Kugona kwavo kuchengetedza mvura kunodzivirira kuoma nguva isati yakwana uye kuve nechokwadi chekurapa kwakakodzera, zvichikonzera pasi yakasimba uye yakagadzikana.
Gypsum Boards: Mune gypsum boards, starch ethers inovandudza kunamatira pakati pegypsum core uye mapepa emucheka, kuwedzera simba rebhodhi uye kugadzikana. Izvi zvakakosha pakuchengetedza kutendeseka kwemaitiro emapuranga panguva yekubata nekuisa.
Starch ethers inomiririra kufambira mberi kwakakosha mukugadzira zvigadzirwa zvegypsum, zvinopa kukwidziridzwa kwekugadziriswa uye kupararira. Kugona kwavo kudzora rheology, kunatsiridza kuchengetwa kwemvura, uye kuwedzera kunamatira kunoshandura kune mabhenefiti anoshanda senge nyore kushandisa, yakawedzerwa nguva yakavhurika, yakaderedzwa shrinkage uye kutsemuka, uye kusimba kwakaringana. Sezvo indasitiri yekuvaka ichiramba ichishanduka ichienda kune inoshanda uye yakagadzikana maitiro, kushandiswa kweiyo starch ethers mune gypsum-based zvigadzirwa zvingangove zvichinyanya kukosha, zvichibatsira kune yemhando yepamusoro uye zvakanyanya kushamwaridzana zvivakwa zvekuvaka.
Nguva yekutumira: Jun-03-2024