Chii chinonzi hydroxypropyl starch ethers?

Hydroxypropyl starch ethers (HPStEs) zvakagadziridzwa zvakabva sitachi zvinowanikwa kuburikidza nekugadziriswa kwekemikari yemamorekuru estarch, anowanzo torwa kubva kune zvakaita sechibage, gorosi, mbatatisi, kana tapioca. HPStEs inogadzirwa nekuunza mapoka ehydroxypropyl kumusana westarch kuburikidza ne etherification reactions.

Iyo kemikari chimiro chehydroxypropyl starch ethers ine starch mamorekuru ane hydroxypropyl (-OCH2CH(OH)CH3) mapoka akasungirirwa kuhydroxyl (-OH) anoshanda mapoka pamwe neiyo starch polymer cheni. Iyo dhigirii yekutsiva (DS), iyo inoreva huwandu hweavhareji yemapoka ehydroxypropyl akasungirirwa paglucose unit ye ​​starch molecule, inogona kusiyana zvichienderana nemamiriro ekuita uye inodiwa zvimiro zvechigadzirwa chekupedzisira.

HPStEs anowanzo chena kusvika kunze-chena hupfu ane akasiyana emuviri zvimiro senge particle size, bulk density, solubility, uye viscosity, iyo inogona kugadzirwa kune chaiyo maapplication uye magadzirirwo zvinodiwa. Hadzina kunyungudika mumvura inotonhora asi dzinogona kupararira nekuzvimba mumvura inopisa, dzichigadzira viscous solutions kana gels.

Hydroxypropyl starch ethers inoratidza akati wandei anodiwa zvivakwa zvinoita kuti zvive zvakakosha zvekuwedzera mune dzakasiyana siyana dzemaindasitiri nekutengesa maapplication:

1. Kuchengeta Mvura: HPStEs ine zvivakwa zvekuchengetedza mvura zvakanyanya, zvichiita kuti ive inoshanda kukora uye kusunga maajenti mumigadziriso senge zvinonamira, machira, uye zvekuvakisa. Vanobatsira kuvandudza kushanda, hydration, uye kunamatira kwezvinhu izvi.
2. Kukora: HPStEs inoshanda seyakagwinya gobvu maajenti mumasisitimu ane aqueous, ichiwedzera viscosity uye kuenderana kwekuumbwa senge pendi, zvinonamira, uye zvigadzirwa zvekuchengeta munhu. Ivo vanopa yakagadziridzwa manyorerwo, kugadzikana, uye kupararira kune aya magadzirirwo.
3. Kugadzira Firimu: HPStEs inogona kuumba mafirimu akajeka uye anochinjika kana akaparadzirwa mumvura, achiita kuti abatsire mukupfeka, mafirimu, uye kurongedza maapplication. Ivo vanovandudza kuumbwa kwemafirimu, kunamatira, uye zvipingamupinyi zvivakwa, vachiwedzera kuita uye kusimba kwechigadzirwa chekupedzisira.
4. Kudzikamisa: HPStEs inoratidza kugadzikana kwakanakisa mumasisitimu ane aqueous, kudzivirira kuparadzaniswa kwechikamu, sedimentation, kana coagulation yezvimedu. Vanobatsira kuchengetedza kufanana uye kugadzikana mumagadzirirwo akadai semulsions, suspensions, uye dispersions.
5. Biodegradability: HPStEs anotorwa kubva kune echisikigo starch masosi uye anogona kuparara, zvichiita kuti ive nehushamwari hwezvakatipoteredza uye inogoneka dzimwe nzira kune zvekugadzira zvekuwedzera mune akasiyana maapplication.
6. Kugarisana: HPStEs inowirirana nehuwandu hwakawanda hwezvimwe zvinhu uye zvinowedzera zvinowanzo shandiswa mukugadzirisa. Iwo anogona kuiswa nyore nyore mumagadzirirwo kuti awane anodiwa zvivakwa uye maitiro ekuita.

Pakazere, hydroxypropyl starch ethers inopa kuita kwakasiyana-siyana, kushanda, uye kusimba, zvichiita kuti ive yekuwedzera inodiwa mumaindasitiri akadai sekuvaka, anonamira, machira, kutarisirwa kwevanhu, chikafu, uye mishonga. Zvivakwa zvavo zvakasiyana-siyana uye mashandisirwo anobatsira mukuvandudza mashandiro, mashandiro, uye kuchengetedza kwezvakatipoteredza muzvikamu zvakasiyana.