Nā ʻokoʻa ma waena o hydroxypropyl starch a me Hydroxypropyl methyl cellulose

ʻO ka hydroxypropyl starch a me ka hydroxypropyl methyl cellulose (HPMC) he polysaccharides i hoʻololi ʻia i hoʻohana ʻia i nā ʻoihana like ʻole, me ka meaʻai, nā lāʻau lapaʻau, nā mea hoʻonaninani, a me ke kūkulu ʻana. ʻOiai kaʻana like lākou, loaʻa iā lākou nā ʻokoʻa like ʻole e pili ana i ke ʻano kemika, nā waiwai, a me nā noi. Eia nā ʻokoʻa nui ma waena o ka hydroxypropyl starch a me HPMC:

Hoʻolālā Kimia:

1. Hydroxypropyl Starch:
   • ʻO ka mākiko hydroxypropyl kahi mākū i hoʻololi ʻia i loaʻa ma ka hoʻokomo ʻana i nā pūʻulu hydroxypropyl ma luna o ka molela starch.
   • ʻO ka starch kahi polysaccharide i haku ʻia me nā ʻāpana glucose i hoʻopili pū ʻia e nā paʻa glycosidic. Hoʻokomo ka Hydroxypropylation i ka hoʻololi ʻana o nā pūʻulu hydroxyl (-OH) i loko o ka molekele starch me nā pūʻulu hydroxypropyl (-CH2CHOHCH3).
2. Hydroxypropyl Methyl Cellulose (HPMC):
   • ʻO ka HPMC he cellulose ether i hoʻololi ʻia i loaʻa ma ka hoʻokomo ʻana i nā pūʻulu hydroxypropyl a me methyl ma luna o ka mole cellulose.
   • ʻO ka cellulose kahi polysaccharide i haku ʻia me nā ʻāpana glucose i hoʻopili pū ʻia e nā paʻa glycosidic β(1→4). Hoʻokomo ka Hydroxypropylation i nā pūʻulu hydroxypropyl (-CH2CHOHCH3), aʻo ka methylation e hoʻokomo i nā pūʻulu methyl (-CH3) ma ka iwi kuamoʻo cellulose.

Nā waiwai:

1. Hiki ke hoʻoheheʻe:
   • Hiki ke hoʻoheheʻe ʻia ka hydroxypropyl starch i ka wai wela akā hiki ke hōʻike i ka hiki ke hoʻoheheʻe ʻia i ka wai anuanu.
   • Hiki ke hoʻoheheʻe ʻia ka HPMC i loko o ka wai anuanu a me ka wai wela, e hana ana i nā ʻoluʻolu maʻemaʻe. ʻO ka solubility o ka HPMC e pili ana i ka degere o ka pani ʻana (DS) a me ke kaumaha molekala o ka polymer.
2. viscosity:
   • Hiki i ka hydroxypropyl starch ke hōʻike i nā waiwai hoʻonui viscosity, akā ʻoi aku ka haʻahaʻa o kona viscosity i ka HPMC.
   • Ua ʻike ʻia ʻo HPMC no kāna mau ʻano mānoanoa maikaʻi loa a me ka viscosity-modifying waiwai. Hiki ke hoʻololi ʻia ka viscosity o nā hāʻina HPMC ma ka hoʻololi ʻana i ka neʻe ʻana o ka polymer, DS, a me ke kaumaha molekala.

Nā noi:

1. Meaʻai a me nā lāʻau lapaʻau:
   • Hoʻohana pinepine ʻia ka hydroxypropyl starch ma ke ʻano he mānoanoa, stabilizer, a me ka gelling agent i nā huahana meaʻai e like me ka soup, sauces, a me nā mea ʻono. Hiki ke hoʻohana ʻia i loko o nā ʻano lāʻau lapaʻau.
   • Hoʻohana nui ʻia ʻo HPMC i ka meaʻai, nā lāʻau lapaʻau, a me nā mea hoʻonaninani ma ke ʻano he mānoanoa, emulsifier, stabilizer, kiʻiʻoniʻoni mua, a me ka mea hoʻokuʻu hoʻokuʻu. Loaʻa pinepine ia i nā huahana e like me nā papa, nā ʻaila, nā ʻaila, a me nā mea mālama pilikino.
2. Nā mea kūkulu hale a me nā mea hana:
   • Hoʻohana nui ʻia ʻo HPMC i ka ʻoihana hana ma ke ʻano he mea hoʻohui i nā huahana sima e like me nā tile adhesives, mortars, renders, a me nā plasters. Hāʻawi ia i ka mālama ʻana i ka wai, ka hana, adhesion, a me ka hoʻomaikaʻi ʻana i ka hana i kēia mau noi.

Ka hopena:

ʻOiai ʻo ka hydroxypropyl starch a me ka HPMC ua hoʻololi ʻia nā polysaccharides me nā hana like, loaʻa iā lākou nā hale kemika ʻokoʻa, nā waiwai, a me nā noi. Hoʻohana nui ʻia ka hydroxypropyl starch i ka meaʻai a me nā noi lāʻau lapaʻau, ʻoiai ʻike ʻo HPMC i ka hoʻohana nui ʻana i ka meaʻai, nā lāʻau lapaʻau, nā mea hoʻonaninani, a me nā mea hana. ʻO ka koho ma waena o ka hydroxypropyl starch a me HPMC e pili ana i nā koi kūikawā o ka noi i manaʻo ʻia.