ʻO ka ʻokoʻa ma waena o ka hydroxypropyl starch ether a me cellulose ether

I kēia manawa ʻaʻole ʻike nui ka poʻe e pili ana i ka hydroxypropyl starch ether. Manaʻo lākou he ʻokoʻa liʻiliʻi ma waena o ka hydroxypropyl starch ether a me ka starch maʻamau, akā ʻaʻole. ʻO ka nui o ka hydroxypropyl starch ether i hoʻohana ʻia i nā huahana mortar he liʻiliʻi loa, a ʻo ka hoʻohui ʻana o ka polar hiki ke loaʻa nā hopena maikaʻi.

ʻO ka hydroxypropyl starch ether (HPS) he pauka keʻokeʻo keʻokeʻo i loaʻa ma o ka hoʻololi ʻana i nā mea kanu maoli, hoʻoulu nui ʻia, a laila hoʻomaloʻo ʻia, me ka ʻole o ka plasticizer. He ʻokoʻa loa ia mai ka starch maʻamau a i ʻole starch hoʻololi ʻia.

A me ka hydroxypropyl methyl cellulose, i ʻike ʻia hoʻi he hypromellose, hydroxypropyl methyl ʻulaʻula ʻulaʻula etera, e hoʻohana i ka pulupulu maʻemaʻe maʻemaʻe cellulose e like me ka mea maka, a mālama iā ia me ka lye ma 35-40 ° C no ka hapalua hola, Squeeze, ʻoki i ka cellulose, a makahiki pono ma 35°C, no laila, i ka awelika degere o ka polymerization o ka loaa alkali fiber i loko o ka i koi 'ia. E hoʻokomo i ka fiber alkali i loko o ka ipu etherification, e hoʻohui i ka propylene oxide a me ka methyl chloride i ke kaʻina, a etherify ia ma 50-80 ° C no 5 mau hola, a ʻo ke kaomi kiʻekiʻe ma kahi o 1.8MPa. A laila e hoʻohui i ka nui kūpono o ka waika hydrochloric a me ka waikawa oxalic i ka wai wela ma 90 ° C e holoi i ka mea e hoʻonui ai i ka leo, a laila e hoʻomaloʻo me ka centrifuge, a hope e holoi pinepine i ka neutrality. Hoʻohana nui ʻia i ke kūkulu ʻana, ka ʻoihana kemika, ka pena, ka lāʻau lapaʻau, ka ʻoihana koa a me nā ʻoihana ʻē aʻe, e like me ka mea hana kiʻiʻoniʻoni, binder, dispersant, stabilizer, thickener, etc.

Hiki ke hoʻohana ʻia ka hydroxypropyl starch ether ma ke ʻano he admixture no nā huahana ciment-based, nā huahana gypsum-based a me nā huahana lime calcium. He kūpono kūpono me nā mea hoʻohui hale ʻē aʻe. Hoʻohana pū ʻia me ka hydroxypropyl methylcellulose ether HPMC, hiki iā ia ke hōʻemi i ke ʻano o ka hydroxypropyl methylcellulose (ma ka hoʻohui ʻana i ka 0.05% o ka HPS hiki ke hōʻemi i ke ʻano o ka HPMC ma kahi o 20% -30%)), a hiki ke pāʻani i kahi hopena mānoanoa, e hoʻolaha i ka kūloko kūloko. hale, me ka ʻoi aku ka maikaʻi o ka pale ʻana a me ka maikaʻi o ka hana.