Tsawg-hloov hydroxyprropyl cellulose (L-HPC) thiab hydroxypropyl cellulose (HPC) yog cov cellulops siv hauv cov tshuaj, khoom noj thiab lwm daim teb. Txawm hais tias lawv tau zoo sib xws hauv cov qauv siv tshuaj lom neeg thiab cov kev siv, lawv muaj qhov sib txawv ntawm cov neeg muaj mob, lub cev, solubility, thiab chaw thov.
1.. Cov qauv siv tshuaj lom neeg thiab qib hloov chaw
HydroxyPropenCellulose (HPC) yog cov khoom lag luam tau tom qab Erications etherification ntawm cov pab pawg hydroxyl tau hloov nrog hydroxypropyl pawg. Cov degree ntawm kev hloov pauv (feem ntau qhia raws li cov qib mololl, uas yog, qhov nruab nrab ntawm cov chav dej zoo nkauj) yog qhov tseem ceeb cuam tshuam rau kev ua haujlwm ntawm HPC. HPC muaj qib siab dua ntawm kev hloov pauv, feem ntau ntawm 3.0 thiab 4.5, uas txhais tau tias feem ntau ntawm cov pab pawg hydroxyl tau hloov los ntawm hydroxypropyl pawg.
Tsawg-hloov hydroxyprophlencellulose (L-HPC) kuj tau npaj los ntawm ib qho kev tiv thaiv ib qho kev tiv thaiv zoo ib yam li, tab sis nws cov qib pauv tau qis dua 0.1 thiab 0.2. Yog li ntawd, cov pab pawg hydroxyl ntawm L-HPC tsuas yog hloov los ntawm cov pab pawg hydroxyprropyl, thiab tus naj npawb ntawm cov pab pawg tsis tau tso tseg hydroxyl yog qhov loj dua. Qhov kev kawm tsawg tsawg ntawm kev hloov pauv L-HPC sib txawv los ntawm HPC hauv lub cev thiab tshuaj kho mob.
2. Solubility
Vim tias qhov sib txawv hauv qib degree hloov chaw, lub solubility ntawm HPC thiab L-HPC qhia qhov sib txawv. HPC yog dej-soluble thiab tuaj yeem yaj nyob rau hauv cov dej txias lossis dej kub kom tsim cov tshuaj muaj kuab. Nws tseem muaj solubility zoo hauv cov kuab tshuaj organic. Qhov kev ua yeeb yam no ua rau HPC feem ntau siv los ua cov khoom siv dag zog, tuab lossis tus neeg sawv cev ntawm cov tshuaj.
Hauv kev sib piv, L-HPC muaj txawv sterliv cog lus vim nws cov qib qis dua hloov chaw. L-HPC yog insoluble hauv dej, tab sis muaj cov dej zoo-nqus o muaj peev xwm hauv dej thiab tuaj yeem tsim cov gel. Cov cuab yeej no ntawm L-HPC tso cai rau nws tau siv ua ib qho kev ua tsis taus lossis muab tub lim rau hauv cov ntsiav tshuaj, pab cov tshuaj kom nrawm nrawm thiab tso dej.
3. Lub cev lub cev
HPC feem ntau ua rau pom ntau dua thiab ua yeeb yaj kiab ua yeeb yam vim nws qib siab dua ntawm kev hloov pauv thiab solubility. HPC cov kev daws teeb meem tuaj yeem tsim cov yeeb yaj kiab HPC tom qab ziab thiab yog li siv tau ntau hauv cov txheej txheej, ua yeeb yaj kiab thiab txheej txheej. Tsis tas li ntawd, HPC kuj muaj qhov zoo thermal stability thiab cov roj kuj, ua kom haum rau cov ntawv thov lub zog kom zoo thiab tshuaj kom ruaj khov.
L-HPC cov khoom pov thawj qis dua viscosity thiab cov dej nqus dej ntau dua vim nws cov qib qis hloov chaw. Nws insolubility nyob rau hauv dej thiab zoo o o o o oping operties muab nws tshwj xeeb zoo nyob rau hauv cov ntsiav tshuaj tsim. L-HPC tuaj yeem nqus dej thiab swell, yog li txhawb nqa cov ntsiav tshuaj sib tsoo thiab kev tso yeeb tshuaj. Cov cuab yeej ua txhaum no ua rau L-HPC dav siv ua tus tsis muaj kev kub ntxhov hauv kev lag luam kws tshuaj.
4. Daim ntawv thov Thaj Chaw
HPC tau dav hauv cov tshuaj, cov tshuaj pleev zaub mov, cov tshuaj pleev ib ce thiab lwm thaj chaw muaj kev lag luam vim nws cov khoom siv solubility zoo, ua yeeb yaj kiab ua yeeb yaj kiab thiab ua kom tuab. Hauv cov chaw muag tshuaj, HPC feem ntau siv los ua tuab, tus neeg sawv cev ntawm tus kheej, cov khoom siv quav, quav yeeb tshuaj thiab cov cab kuj. Tsis tas li ntawd, HPC kuj tseem siv nyob rau hauv cov zaub mov ua cov tuab thiab emulsifier, thiab hauv tshuaj pleev ib ce ua cov yeeb yaj kiab-ua yeeb yaj kiab thiab moisturizer.
L-HPC feem ntau yog siv hauv kev lag luam kws tshuaj, tshwj xeeb tshaj yog nyob rau hauv kev npaj cov ntsiav tshuaj. Raws li ib qho kev tsis sib haum xeeb zoo, nws tuaj yeem nce cov tshuaj tua kab mob ceev thiab txhawb nqa cov tshuaj tso tawm, yog li txhim kho cov tshuaj lom neeg. Tsis tas li ntawd, L-HPC kuj tseem siv tau los ua tus muab tub lim thiab ua rau muaj kev ua kom zoo dua los txhim kho lub hardness thiab ruaj khov ntawm cov ntsiav tshuaj.
5. Thov cov piv txwv
Hauv kev lag luam kws tshuaj, HPC feem ntau siv nyob rau hauv kev npaj ntawm kev tswj hwm-tso tawm. Nws tuaj yeem tswj cov tshuaj tso tawm los ntawm kev tsim cov txheej uas muaj hom phiaj ua kua, nyob ntawm cov tshuaj. Cov ntawv thov raug suav nrog kev muab cov tshuaj tso tawm hauv kev ncua-tso cov ntsiav tshuaj thiab cov ntsiav tshuaj.
L-HPC tau dav siv hauv cov ntsiav tshuaj tam sim ntawd ua cov ntsiav tshuaj tsis raug. Piv txwv li, hauv qee cov tshuaj sai sai-tso tawm ntsiav tshuaj, qhov ntxiv ntawm L-HPC tuaj yeem ua kom luv rau hauv lub cev, yog li nrawm qhov pib ntawm cov tshuaj.
6. Ib puag ncig kev cuam tshuam thiab kev nyab xeeb
MPC thiab L-HPC yog derivatives muab tau los ntawm ntuj cellulose thiab yog li ntawd muaj cov phooj ywg biodegress thiab ib puag ncig ib puag ncig. Lawv tau yooj yim decomposed nyob rau hauv lub ntuj ib puag ncig thiab muaj tsawg dua kev cuam tshuam rau ntawm ecological ib puag ncig. Ib qho ntxiv, ob qho tib si yog cov ntaub ntawv nyab xeeb thiab siv dav hauv kev tsim cov khoom noj thiab cov tshuaj.
Txawm hais tias tsawg-hloov hydroxyprropyl cellulose (L-HPC) thiab hydroxypropyl cellulose, lub zog siv lub cev, thiab daim teb. Ho txawv. L-HPC feem ntau yog siv nyob rau hauv lub chaw muag tshuaj vim nws cov khoom siv tsis txaus siab, thaum HPC tau dav siv hauv nws cov khoom siv solubility zoo thiab ua yeeb yaj kiab zoo nkauj. Qhov sib txawv ntawm ob tug lus dag nyob rau hauv cov nyhuv ntawm cov qib degree hloov ntawm lub cev nqaij daim tawv thiab tshuaj, yog li txiav txim siab lawv cov kev haum rau cov ntawv thov sib txawv.
Lub Sijhawm Post: Feb-17-2025