Starch ethers imhando yakagadziridzwa yesitachi iyo yakagamuchira kutariswa kwakapararira mune dzakasiyana siyana maindasitiri ekushandisa nekuda kwekusiyana-siyana uye akasiyana zvivakwa. Kunyange ichiwanzo shandiswa mukunamira nekuda kwekugona kwayo kusungirira, kukodzera kwayo kwenzvimbo dzekupisa kwepamusoro kunoenderana nezvakati wandei.
1. Nhanganyaya kune starch ether:
Starch ethers zvinobva kune yekuzvarwa starch, ari mapolysaccharides anowanikwa mumiti. Kuburikidza nekuchinja kwemakemikari, kazhinji kunosanganisira etherification, starch ethers inogadzirwa kuti iwedzere zvimiro zvadzo uye kuita kuti ive yakakodzera kune chaiwo maapplication. Iyo yekugadziridza maitiro inoshandura iyo hydrophilic uye hydrophobic zvimiro zve starch, nekudaro inovandudza kugadzikana, solubility uye rheological properties.
2. Zvinhu zve starch ether:
Starch ethers vane akati wandei akakosha zvivakwa zvinoita kuti vataridzike kune akasiyana maindasitiri ekushandisa, kusanganisira zvinonamira. Zvinhu izvi zvinosanganisira:
A. Mvura Inonyungudutswa: Starch ethers inonyungudika mumvura uye inogona kuiswa nyore nyore mukugadzira zvinonamira uye inokurudzira kunaka kwekunyorova.
b. Kugona kugadzira firimu: Starch ethers inogona kugadzira mafirimu anobatsira anonamira kunamatira kumusoro uye kupa simba kune inonamira zvinhu.
C. Thickener: Inoita sechidzitiro mukugadzirwa kwekunamatira, inokanganisa viscosity nekuvandudza maitiro ekushandisa.
d. Biodegradability: Starch ethers inotorwa kubva kune zvinodzoreredzwa zviwanikwa uye saka ine hushamwari kwezvakatipoteredza uye inokodzera maapplication anotarisa pakusimba.
3. Adhesive applications of starch ether:
Starch ethers inogona kushandiswa mumhando dzakasiyana dzekunamatira, senge:
A. Mapepa nemapakeji ekunamira: Starch ether anowanzo shandiswa mumapepa nemapakeji ekunamira nekuda kwekugadzira firimu uye anonamira maitiro.
b. Zvinamira zvekuvaka: Kunyungudika kwemvura uye kugona kukora kwestarch ether kunoita kuti ive yakakodzera kushandiswa sezvinamira zvekuvaka kubatsira bhondi zvekuvaka.
C. Wood Adhesives: Mumhizha yehuni, starch ethers inoshandiswa mumatanda emiti kuti iwedzere simba rezvisungo uye kupa kugadzikana.
d. Textile adhesives: Starch ether inoshandiswa mumachira ekunamira nekuda kwekugona kwayo kusungirira mafiibha uye kuwedzera simba rose rejira.
4. Kuita munzvimbo yekushisa kwepamusoro:
Kune zvikumbiro uko kupisa kwakanyanya kunosangana, kushanda kwe starch ethers munzvimbo dzekushisa kwepamusoro chinhu chakakosha kufunga. Pane zvinhu zvakawanda zvinokanganisa maitiro ayo munyaya iyi:
A. Thermal Stability: Starch ethers inoratidza madhigirii akasiyana-siyana ekudzikama kwekupisa zvichienderana nedhigirii yadzo yekutsiva uye kugadziridzwa kwekemikari chaiyo kunoshandiswa panguva yekugadzira etherification.
b. Gelatinization tembiricha: Iyo tembiricha yegelatinization yestarch ether ndiyo yakakosha parameter mune yakakwirira-tembiricha maapplication uye ichakanganiswa nehuremu hwayo hwemamorekuru uye dhigirii rekutsiva.
C. Viscosity inoshanduka: Kupisa kwepamusoro kunogona kushandura viscosity yemiti yakanamatira ine starch ethers. Kunzwisisa shanduko idzi kwakakosha kuti uve nechokwadi chekuenderana kwekunamatira kuita.
d. Bond Strength: Simba rechisungo remaumbirwo ane starch ether anogona kukanganiswa netembiricha, saka kunzwisisa kwakakwana kwezvinodikanwa zvekushandisa kunodiwa.
5. Kugadzirisa nzira yekudzikama kwekushisa kwepamusoro:
Kuti uwedzere kushanda kwe starch ether munzvimbo dzekushisa kwepamusoro, nzira dzinotevera dzekugadzirisa dzinogona kutorwa:
A. Cross-linking: Cross-linking starch ether molecules inowedzera kugadzikana kwekupisa uye kuramba kune tembiricha-induced viscosity shanduko.
b. Kusanganisa nemapolima asingadziviriri kupisa: Kubatanidza starch ethers nemapolima asingapise kupisa kunogona kuita mahybrid adhesive formulations anochengetedza kugadzikana pakupisa kwakanyanya.
C. Mishonga yemakemikari: Zvimwe zvinogadziriswa zvemakemikari, zvakadai sekuiswa kwemapoka ekushanda asingadziviriri kupisa, anogona kuongororwa kuti agadzirise starch ethers kune mamwe maitiro ekupisa kwepamusoro.
6. Zvidzidzo uye mashandisirwo anoshanda:
Kuongorora zviitiko zvepasirese zvepasirese uye zvinoshanda zvinopa ruzivo rwakakosha mukuita kwe starch ether munzvimbo dzekupisa kwepamusoro. Maindasitiri uko kushomeka kwekushisa kwakakosha, senge mota, aerospace uye zvemagetsi, anogona kupa mienzaniso yakakosha.
7. Mafungiro ezvakatipoteredza:
Sezvo kunetseka kwezvakatipoteredza kunowedzera kukosha, biodegradability ye starch ethers inowedzera mukana wakakura. Kuongorora kukanganiswa kwezvakatipoteredza kweanonamira maumbirwo ane starch ethers mune yakanyanya tembiricha yekushandisa kune inoenderera maitiro.
8. Nhungamiro yeramangwana nemikana yekutsvaga:
Kuenderera mberi nekutsvagisa uye kusimukira mumunda we starch ether kugadziridzwa kunogona kuvhura mikana mitsva yekushandiswa kwayo munzvimbo dzekupisa kwepamusoro. Kuongorora hunyanzvi hwekugadzirisa hunyanzvi, kunzwisisa nzira dzepasi dzekudzikama kwekupisa, uye kuona kuwirirana nemamwe mapolymer inzvimbo dzakakodzera dzekuferefeta.
9. Mhedziso:
Muchidimbu, starch ethers vari kuvimbisa vakwikwidzi veadhesive application, vane huwandu hwezvinhu zvinodikanwa. Kuita kwayo munzvimbo dzekushisa kwepamusoro kunoenderana nekunyatsotariswa kwezvinhu zvakadai sekugadzikana kwekupisa, gelatinization tembiricha uye kusimba kwechisungo. Kuburikidza nekugadziridzwa kwehungwaru uye magadzirirwo matsva, starch ethers inogona kugadzirwa kuti igadzirise matambudziko anokonzerwa nekupisa kwakanyanya, kuvhura nzira nyowani dzekushandisa mumaindasitiri uko kushomeka kwekupisa. Sezvo tsvagiridzo inofambira mberi, basa remasitashi ethers mune zvinonamira zvikumbiro zvingangowedzera, zvichiwedzera kusimbisa chinzvimbo chavo sechinhu chinobatika uye chinobatika chinonamira zvinhu.
Nguva yekutumira: Zvita-02-2023