Hydroxypropyl methylcellulose (HPMC) i polymer inoshanda zvakasiyana-siyana inoshandiswa zvakanyanya seyakakora mumaindasitiri akasiyana akadai semishonga, zvizorwa, chikafu, uye zvekuvakisa. Kunzwisisa rheological zvimiro zveHPMC thickener masisitimu kwakakosha pakugadzirisa mashandiro avo mumashandisirwo akasiyana.
1. Viscosity:
HPMC thickener masisitimu anoratidza shear-kuonda maitiro, zvichireva kuti viscosity yavo inodzikira nekuwedzera shear rate. Ichi chivakwa chinobatsira mukushandisa uko kuri nyore kushandisa kana kugadzirisa kunodiwa, senge pendi uye machira.
Iyo viscosity yeHPMC mhinduro inopesvedzerwa nezvinhu zvakaita se polymer concentration, molecular weight, substitution degree, tembiricha, uye shear rate.
Payero yakaderera shear, HPMC mhinduro dzinoita senge zvinwiwa zvinopenya zvine viscosity yakakwira, nepo pakakwirira shear mitengo, dzinoita senge mvura shoma inopenya, ichifambisa kuyerera kuri nyore.
2. Thixotropy:
Thixotropy inoreva pfuma yezvimwe zvinwiwa kuti zviwanezve viscosity yavo pakumira mushure mekuiswa kune shear stress. HPMC thickener masisitimu anowanzo kuratidza maitiro ethixotropic.
Kana yaiswa kune shear stress, iyo yakareba polymer cheni inonangana munzira yekuyerera, ichideredza viscosity. Pakupera kwekunetseka kweshear, cheni dzepolymer zvishoma nezvishoma dzinodzokera kune yakasarudzika, zvichikonzera kuwedzera kwe viscosity.
Thixotropy inodikanwa mumashandisirwo akadai sekuputira uye kunamatira, uko zvinhu zvinoda kuchengetedza kugadzikana panguva yekushandiswa asi kuyerera nyore pasi peshear.
3. Goho Stress:
HPMC thickener masisitimu anowanzo kuve nekushushikana kwegoho, kunova kudiki kushushikana kunodiwa kuti utange kuyerera. Pazasi pekushushikana uku, izvo zvinhu zvinoita senge yakasimba, inoratidza elastic maitiro.
Iko kushushikana kwegoho kweHPMC mhinduro kunoenderana nezvinhu zvakaita se polymer concentration, molecular huremu, uye tembiricha.
Kushushikana kwegoho kwakakosha mumashandisirwo apo zvinhu zvinoda kuramba zviri panzvimbo pasina kuyerera pasi pehuremu hwayo, senge mumachira akachinjika kana kumiswa kwezvimedu zvakasimba mumapende.
4. Temperature Sensitivity:
Iyo viscosity yeHPMC mhinduro inokanganiswa netembiricha, ine viscosity inowanzo dzika sezvo tembiricha inowedzera. Iyi hunhu ndiyo yakajairika yepolymer mhinduro.
Tembiricha senitivity inogona kukanganisa kuenderana uye kuita kweHPMC thickener masisitimu mumashandisirwo akasiyana siyana, ichida kugadziridzwa mukugadzira kana kuita maparamendi kuchengetedza zvivakwa zvinodikanwa pamhando dzakasiyana dzetembiricha.
5. Shear Rate Kutsamira:
Iyo viscosity yeHPMC mhinduro inoenderana zvakanyanya neshear rate, ine yakakwirira shear mitengo inotungamira kune yakaderera viscosity nekuda kwekurongeka uye kutatamuka kwepolymer cheni.
Uku kutsamira kwechiyero chekugera kunowanzo kutsanangurwa nemutemo-mutemo kana Herschel-Bulkley modhi, idzo dzine hukama hwekugera kushear rate uye kushushikana kwegoho.
Kunzwisisa kutsamira kweshear rate kwakakosha pakufanotaura nekudzora mafambiro ekuyerera kweHPMC thickener masisitimu mumashandisirwo anoshanda.
6. Concentration Effects:
Kuwedzera kuwanda kweHPMC mumhinduro kunowanzo tungamira mukuwedzera kwe viscosity uye goho kushushikana. Iyi yekusimbisa mhedzisiro yakakosha pakuwana iyo inodiwa kuenderana uye kuita mune akasiyana maapplication.
Nekudaro, pakunyanya kudzika, HPMC mhinduro dzinogona kuratidza gel-semaitiro, ichigadzira network sisitimu inowedzera zvakanyanya viscosity uye goho kushushikana.
7. Kusanganisa uye Kupararira:
Kusanganisa kwakaringana uye kupararira kweHPMC mumhinduro kwakakosha kuti uwane yunifomu viscosity uye rheological zvimiro mukati mehurongwa.
Kupararira kusina kukwana kana kusanganiswa kweHPMC zvimedu zvinogona kutungamirira kune isina-uniform viscosity uye kukanganisa kushanda mumashandisirwo akadai semajasi uye zvinonamira.
Akasiyana siyana ekusanganisa matekiniki uye ekuwedzera anogona kushandiswa kuve nechokwadi chekupararira uye kuita kweHPMC thickener masisitimu.
Iwo rheological zvimiro zveHPMC thickener masisitimu, anosanganisira viscosity, thixotropy, goho kushushikana, tembiricha senitivity, shear rate kutsamira, concentrations, uye kusanganisa/kuparadzira maitiro, inoita basa rakakosha mukuona mashandiro avo mumashandisirwo akasiyana siyana. Kunzwisisa nekudzora zvivakwa izvi kwakakosha pakugadzira HPMC-yakavakirwa zvigadzirwa neinodiwa kuenderana, kugadzikana, uye kushanda.
Nguva yekutumira: Chivabvu-08-2024