Indasitiri yekuvaka yakashandurwa nekushandiswa kwezvimwe zvinowedzera mukugadzirwa kwezvinhu zvekuvakisa zvakaita sekongiri, simende nedhaka.Chimwe chekuwedzera chakadaro hydroxypropyl starch ether, inowanzozivikanwa seHPS, iyo inoshandiswa kugadzirisa zvinhu zvedhaka.Muchikamu chino, tichakurukura basa rehydroxypropyl starch ether mudhaka.
Hydroxypropyl starch ether iupfu chena kana kuti chiedza yeyero, inonyungudika mumvura.Inotorwa kubva muchibage kuburikidza nemakemikari ekugadzirisa maitiro anosanganisira etherification uye hydroxypropylation.Iyo inokonzeresa yekuwedzera yakavandudza kuchengetedza kwemvura, kugadzirisa uye kugadzikana, zvichiita kuti ive yakakodzera kushandiswa mumatope.
Doka musanganiswa wejecha, simende, mvura nezvinowedzerwa zvinoshandiswa kubatanidza zvinhu zvekuvaka pamwechete.Pane zvakati wandei zvakanakira kuwedzera hydroxypropyl starch ether mudhaka.Kutanga, inovandudza processability yemusanganiswa.Kushanda (workability) zvinoreva nyore kusanganiswa, kuiswa nekupedza dhaka.Nekuwedzera kweHPS, dhaka rinova nyore kupararira, zvichikonzera kufukidzwa kuri nani uye kupera kwakapfava.Izvi zvinonyanya kukosha munzvimbo dzinokosha aesthetics, dzakadai sekushongedza kunopera.
Kechipiri, hydroxypropyl starch ether inovandudza kuchengetedza kwemvura kuita kwedhaka, nekudaro ichidzikisa kurasikirwa kwemvura panguva yekurapa.Mvura chikamu chakakosha chekugadzika kwekutanga uye kuoma kwedhaka.Nokudaro, kuchengetedza mvura mumusanganiswa kwenguva yakareba kunovandudza maitiro emagetsi emarara akapora.Izvi zvinogumawo nenhamba yakaderedzwa yekutsemuka uye inowedzera kusimba kwayo.
Chechitatu, HPS inovandudza kugadzikana kwezvinhu zvedhaka.Inoderedza kupatsanurwa kwemusanganiswa, unoitika nekuda kwekusiyana kwehukuru uye kuwanda kwezvikamu.Izvi zvinobvumira musanganiswa kuti urambe wakagadzikana kwenguva yakareba pasina njodzi yekugadzirisa kana coagulation.Iyi ficha inonyanya kubatsira apo musanganiswa unoda kutakurwa kana kuchengetwa kwenguva yakareba usati washandiswa.
Mukupedzisa, hydroxypropyl starch ether chinhu chakakosha chekuwedzera chinogona kushandiswa kuvandudza ma mechanic uye aesthetic zvimiro zvematope.Inovandudza mashandiro, kuchengetedza mvura uye kugadzikana, zvichiita kuti ive yakanakira mainjiniya nevagadziri.Nekudzikisa huwandu hwemvura yakarasika panguva yekurapa, inowedzera kusimba uye kusimba kwedhaka rakaporeswa, zvichiita kuti ive sarudzo yakakodzera yekutakura mitoro.Mukuwedzera, iyo processability yemusanganiswa inovandudzwa uye chigadzirwa chekupedzisira chinowedzera kutaridzika.Naizvozvo, kushandiswa kwehydroxypropyl starch ethers mukugadzira dhaka isarudzo inoshanda kumakambani ari kutsvaga kuvandudza kunaka kwezvigadzirwa zvavo zvekupedzisira.
