ʻO ka Hydroxypropyl methylcellulose (HPMC) he pūhui multifunctional i hoʻohana nui ʻia i nā ʻoihana like ʻole ma muli o kāna ʻano kemika a me nā waiwai.
1. Hoʻohui kemika:
a.iwi kuamoʻo cellulose:
ʻO ka HPMC he cellulose derivative, ʻo ia ka mea i loaʻa mai ka cellulose, he polysaccharide maoli i loaʻa i nā paia o nā mea kanu.Aia ka Cellulose i nā ʻāpana hou o ka β-D-glucose i hoʻopili ʻia e nā paʻa glycosidic β(1→4).
b.Pani:
I loko o ka HPMC, ua pani ʻia ka ʻāpana hydroxyl (-OH) o ka iwi kuamoʻo cellulose me nā hui methyl a me hydroxypropyl.Loaʻa kēia hoʻololi ma o ka hopena etherification.ʻO ke degere o ka pani ʻana (DS) e pili ana i ka helu awelika o nā pūʻulu hydroxyl i hoʻololi ʻia i kēlā me kēia ʻāpana glucose i ke kaulahao cellulose.ʻOkoʻa ka DS o nā hui methyl a me hydroxypropyl, e pili ana i ka hana o HPMC.
2. Hoʻohui:
a.Etherification:
Hoʻopili ʻia ʻo HPMC ma o ka hopena etherification o cellulose me propylene oxide a me methyl chloride.Hoʻopili ke kaʻina hana i ka cellulose me ka propylene oxide e hoʻolauna i nā pūʻulu hydroxypropyl a laila me ka methyl chloride e hoʻokomo i nā hui methyl.
b.Degere o ka mana 'ē aʻe:
Hiki ke ho'omalu 'ia ka DS o HPMC ma ka ho'ololi 'ana i nā kūlana ho'ololi e like me ka mahana, ka manawa pane, a me ka ne'e o ka reactant.
3. Hana:
a.Hiki ke hoʻoheheʻe:
Hiki ke hoʻoheheʻe ʻia ka HPMC i ka wai a me kekahi mau mea hoʻoheheʻe kūlohelohe, e like me ka methanol a me ka ethanol.Eia naʻe, e emi ana kona solubility me ka piʻi ʻana o ke kaumaha molekala a me ka pae o ka hoʻololi ʻana.
b.Hoʻokumu kiʻiʻoniʻoni:
Hoʻokumu ʻo HPMC i kahi kiʻiʻoniʻoni ʻoniʻoni a maʻalahi ke hoʻoheheʻe ʻia i ka wai.Loaʻa i kēia mau kiʻiʻoniʻoni maikaʻi ka ikaika mechanical a me nā mea pale.
C. Viscosity:
Hōʻike nā haʻina HPMC i ke ʻano pseudoplastic, ʻo ia hoʻi ka emi ʻana o ko lākou viscosity me ka piʻi ʻana o ka shear rate.ʻO ka viscosity o ka HPMC solutions e pili ana i nā mea e like me ka neʻe ʻana, ke kaumaha molekala, a me ke degere o ka hoʻololi ʻana.
d.Paʻa wai:
ʻO kekahi o nā waiwai koʻikoʻi o ka HPMC ʻo kona hiki ke mālama i ka wai.He mea koʻikoʻi kēia waiwai i nā noi like ʻole e like me nā mea kūkulu hale, kahi i hoʻohana ʻia ai ka HPMC ma ke ʻano he mānoanoa a me ka mea mālama wai.
e.Hoʻopili:
Hoʻohana pinepine ʻia ʻo HPMC ma ke ʻano he mea hoʻopili i nā ʻoihana like ʻole ma muli o kona hiki ke hana i nā paʻa ikaika i nā substrate like ʻole.
4. Noi:
a.ʻoihana lāʻau lapaʻau:
I loko o nā lāʻau lapaʻau, hoʻohana ʻia ka HPMC ma ke ʻano he mea hoʻopaʻa, mea hoʻopili kiʻiʻoniʻoni, mea hoʻokuʻu hoʻokuʻu ʻia, a me ka mea hoʻololi viscosity i nā ʻano papa.
b.ʻOihana kūkulu hale:
Hoʻohui ʻia ʻo HPMC i nā mortar ciment-based, gypsum-based plasters and tile adhesives e hoʻomaikaʻi i ka hana, ka paʻa ʻana o ka wai a me ka pili.
C. ʻoihana meaʻai:
I ka ʻoihana meaʻai, hoʻohana ʻia ʻo HPMC ma ke ʻano he mānoanoa, stabilizer a me ka emulsifier i nā huahana e like me nā kīʻaha, nā lole a me ka ice cream.
d.Nā huahana mālama pilikino:
Hoʻohana ʻia ʻo HPMC ma ke ʻano he mānoanoa, emulsifier a me ka mea hana kiʻiʻoniʻoni i nā huahana mālama pilikino e like me nā shampoos, lotions a me nā ʻaila.
e.Nā pena a me nā pena:
I loko o nā pena a me nā uhi, hoʻohana ʻia ka HPMC e hoʻomaikaʻi i ka hoʻopuehu ʻana i ka puaʻa, ka mana viscosity a me ka mālama ʻana i ka wai.
ʻO ka Hydroxypropylmethylcellulose (HPMC) he mea hoʻohui like me ka nui o nā noi ma nā ʻoihana like ʻole.ʻO kāna ʻano kemika kūʻokoʻa, synthesis a me nā waiwai e lilo ia i mea waiwai nui i nā lāʻau lapaʻau, nā mea kūkulu hale, nā meaʻai, nā huahana mālama pilikino a me nā pena/pena.ʻO ka hoʻomaopopo ʻana i nā waiwai o HPMC e hiki ai i nā noi maʻamau i nā ʻano ʻokoʻa, e hāʻawi ana i kāna hoʻohana ākea a me ka mea nui i nā kaʻina hana hana hou.
Ka manawa hoʻouna: Feb-22-2024