Chii chinonzi Hydroxypropyl Starch Ether?

Hydroxypropyl starch ether (HPS) isitashi yakagadziridzwa yave kuwedzera mukurumbira mumaindasitiri akasiyana seanokora, anodzikamisa, uye emulsifying agent. Iyo inonyungudika nemvura inonyungudutswa yecarbohydrates inotorwa kubva muchibage chakasikwa, mbatatisi, kana tapioca starch kuburikidza nemakemikari ekugadzirisa maitiro anosanganisira kuunzwa kwemapoka ehydroxypropyl kumamorekuru estarch.

Kushandiswa kweHPS kwave kukurumbira muindasitiri yezvekudya sezvo ichivandudza magadzirirwo, muromo, uye hupenyu hwesherufu hwezvigadzirwa zvakawanda zvekudya. Inowanzoshandiswa mumasobho, sosi, giravi, puddings, uye zvimwe zvigadzirwa zvinoda kukora kana kudzikamisa. HPS inoshandiswawo muindasitiri yemishonga kuvandudza kuendesa zvinodhaka, pamwe nemuzvizoro uye zvigadzirwa zvekuchengeta munhu senge shampoo, lotions, uye makirimu.

Muchinyorwa chino, isu tichaongorora zvivakwa, maitiro ekugadzira, maapplication, uye kuchengetedza kufunga kweHPS.

Zvinhu zveHydroxypropyl Starch Ether

Hydroxypropyl starch ether ivhu chena, risinganhuhwi, uye risingaravi rinonyungudika mumvura nezvimwe zvinonyungudutsa polar. Iine huremu hwema molecular kubva ku1,000 kusvika ku2,000,000 Daltons, zvichienderana nehuwandu hwekutsiviwa kwemapoka ehydroxypropyl. Iyo dhigirii yekutsiva (DS) inoreva huwandu hweavhareji yemapoka ehydroxypropyl paanhydroglucose unit (AGU) mune starch molecule. Iyo DS yepamusoro inoguma mune yakawanda hydrophilic uye inonyungudika nemvura HPS molecule.

HPS inowanikwa mumagiredhi akasiyana, zvichienderana neayo viscosity, particle size, uye zvimwe zvivakwa. Iyo viscosity yeHPS inowanzo kuratidzwa maererano neiyo Brookfield viscosity, iyo inoyerwa mu centipoise (cP) pane yakatarwa shear rate uye tembiricha. Yepamusoro-viscosity HPS mamakisi anoshandiswa kune zvakakora zvigadzirwa, nepo akaderera-viscosity mamakisi achishandiswa kune zvitete.

Iyo particle size yeHPS zvakare chinhu chakakosha chivakwa, sezvo ichikanganisa kupararira kwayo uye kuyerera. HPS inowanikwa mumhando dzakasiyana siyana, kubva pahupfu hwakatsetseka kusvika kune granules, zvichienderana nekushandiswa.

Kugadzira Maitiro eHydroxypropyl Starch Ether

Kugadzirwa kweHPS kunosanganisira kugadziridzwa kwechisikigo starch uchishandisa maitiro pakati peiyo starch nepropylene oxide (PO), iyo inosuma mapoka ehydroxypropyl kumamorekuru estarch. Iyo nzira inowanzoitwa mune aqueous alkaline mhinduro, pamwe nekuwedzera kweiyo catalyst senge sodium hydroxide kana potassium hydroxide.

Iyo yekugadziridza maitiro inopesvedzerwa nezvinhu zvakati wandei, senge nguva yekuita, tembiricha, pH, PO / starch ratio, uye catalyst concentration. Izvi zvinhu zvinokanganisa dhigirii rekutsiva, huremu hwemamorekuru, uye zvimwe zvimiro zvechigadzirwa cheHPS.

Iyo yakagadziridzwa starch inogezwa, isina kusimba, uye yakaomeswa kuti iwane hupfu chena kana magranules. Chigadzirwa cheHPS chinozoyedzerwa kune akasiyana zvivakwa senge viscosity, particle size, hunyoro hwemukati, uye kuchena.

Zvishandiso zveHydroxypropyl Starch Ether

Kushandiswa kweHPS mukuvaka kunobatsira nenzira dzakasiyana-siyana, dzakadai sekuvandudza simba uye kusimba kwekongiri, kuderedza mvura yemvura, uye kuwedzera kunamatira uye kubatanidzwa kwematope. Zvimwe zvezvakajairwa zveHPS mukuvaka ndezvi:

1. Kongiri

HPS inoshandiswa mukongiri senge inoderedza mvura, iyo inoderedza huwandu hwemvura inodiwa kune yakapihwa musanganiswa dhizaini. Izvi zvinoguma nekusimba kwepamusoro uye kusimba kwekongiri, sezvo mvura yakawandisa inogona kuderedza kongiri uye kukonzeresa kutsemuka. HPS inovandudzawo kushanda uye kuyerera kwekongiri, iyo inobatsira mumapurojekiti makuru.

2. Doka:

HPS inoshandiswa mudhaka seplasticizer, iyo inovandudza kushanda uye kuwirirana kwedhaka. Izvi zvinoguma nehukama huri nani pakati pedhaka uye masonry units, izvo zvakakosha pakuumbwa kwehutano hwechivako. HPS zvakare inoderedza zvemukati memvura mudhaka, izvo zvinovandudza simba rayo nekusimba.

3. Gypsum zvigadzirwa:

HPS inoshandiswa muzvigadzirwa zvegypsum zvakaita sepurasita uye komisheni yakabatana seyakakora uye inodzikamisa. Izvi zvinoguma nekushandiswa kwakapfava uye kunoenderana kwezvigadzirwa zvegypsum, pamwe nekuvandudza kunamatira uye kubatana. HPS inovandudzawo nguva yekumisikidza uye simba rezvigadzirwa zvegypsum, izvo zvinobatsira mukuvaka zvikumbiro.

Pamusoro pezvishandiso zviri pamusoro, HPS inogona zvakare kushandiswa mune zvimwe zvekuvaka senge machira, zvinonamira, uye sealants. Kushandiswa kweHPS mukuvaka kunogona kuvandudza kunaka, kushanda zvakanaka, uye kuenderera mberi kwemapurojekiti ekuvaka, pamwe nekuderedza mitengo nemarara.